Qashqai J11. Engine control system (MR20DD) - part 13

ECM-194

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0122, P0123 TP SENSOR

P0122, P0123 TP SENSOR

DTC Description

INFOID:0000000010702918

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (TP sensor 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 2)

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 8 V or more at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECM-194, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702919

1.

CHECK DTC PRIORITY

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0122

TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A” 
circuit low)

An excessively low voltage from the TP sensor 2 is sent to ECM.

P0123

TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A” 
circuit high)

An excessively high voltage from the TP sensor 2 is sent to ECM.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

• The ECM controls the electric throttle control actuator in regulating the throttle opening in order 

for the idle position to be within +10 degrees.

• The ECM regulates the opening speed of the throttle valve to be slower than the normal con-

dition. So, the acceleration will be poor. 

NOTE:
If throttle position sensor1 and 2 malfunction at the same time conducts following control.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

P0122, P0123 TP SENSOR

ECM-195

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

N

P

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If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

ECM-306, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

4.

CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

+

Ground

Voltage

Electric throttle control actuator

Connector

Terminal

F45

2

Ground

Approx. 5 V

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

2

F16

60

Existed

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

4

F16

75

Existed

ECM-196

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0122, P0123 TP SENSOR

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK THROTTLE POSITION SENSOR

Refer to 

ECM-196, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

Component Inspection

INFOID:0000000010702920

1.

CHECK THROTTLE POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform 

ECM-128, "Work Procedure"

.

4.

Turn ignition switch ON.

5.

Set selector lever position to D (CVT) or 1st (M/T) position.

6.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-149, "Removal and Installation"

.

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F45

3

F16

71

Existed

ECM

Condition

Voltage

Connector

+

–

Terminal

F16

63

75

Accelerator pedal

Fully re-
leased

More than 0.36 V

Fully de-
pressed

Less than 4.75 V

71

Fully re-
leased

Less than 4.75 V

Fully de-
pressed

More than 0.36 V

P0130 A/F SENSOR 1

ECM-197

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

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P0130 A/F SENSOR 1

DTC Description

INFOID:0000000010702921

DTC DETECTION LOGIC

To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 sig-
nal fluctuates according to fuel feedback control.

POSSIBLE CAUSE

• Harness or connectors (The A/F sensor 1 circuit is open or shorted.)
• A/F sensor 1

FAIL-SAFE

Not applicable

PERFORM DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 6.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

WITH CONSULT

1.

Start engine and warm it up to normal operating temperature.

2.

Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” with CONSULT.

3.

Check “A/F SEN1 (B1)” indication.

Does the indication constantly fluctuate around 2.2 V?

YES

>> GO TO 3.

NO

>> Proceed to 

ECM-198, "Diagnosis Procedure"

.

3.

PERFORM DTC CONFIRMATION PROCEDURE-1

1.

Select “ENGINE” of “A/F SEN1” in “DTC WORK SUPPORT” mode of “A/F (B1) P0130” with CONSULT.

2.

“TESTING” is displayed on the CONSULT screen when the following conditions are met.

CAUTION:

Always drive vehicle at a safe speed.

Is “TESTING” displayed on CONSULT screen?

YES

>> GO TO 4.

NO

>> If “TESTING” is not displayed after 20 seconds, GO TO 2.

4.

PERFORM DTC CONFIRMATION PROCEDURE-2

1.

Release accelerator pedal fully.
NOTE:

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0130

A/F SENSOR1 (B1)
(O2 sensor circuit bank 1 sensor 1)

The output voltage computed by ECM according to the A/F sensor 1 signal 
is constant.

ENG SPEED

850 - 2,300 rpm

VHCL SPEED SE

More than 64 km/h (40 mph)

B/FUEL SCHDL

1.0 - 8.0 msec

Selector lever

Suitable position

ECM-198

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0130 A/F SENSOR 1

Never operate brake pedal when releasing the accelerator pedal.

2.

Confirm that “TESTING” change to “COMPLETED”.

Is “COMPLETED” displayed on CONSULT screen?

YES

>> GO TO 5.

OUT OF CONDITION>>GO TO 3.

5.

PERFORM DTC CONFIRMATION PROCEDURE-3

Touch “SELF - DIAG RESULT”.

Is “OK” displayed on CONSULT screen?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> “NG” proceed to 

ECM-198, "Diagnosis Procedure"

.

6.

PERFORM COMPONENT FUNCTION CHECK

WITHOUT CONSULT

NOTE:
Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.
1.

Start engine and warm it up to normal operating temperature.

2.

Shift the lever to suitable position and drive for a few minutes at 80 km/h (50 MPH).

CAUTION:

Always drive vehicle at a safe speed.

3.

Release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (31 MPH).
NOTE:
Never apply brake when releasing the accelerator pedal.

4.

Repeat steps 2 and 3, 5 times.

5.

Stop the vehicle, turn ignition switch OFF and wait at least 10 seconds.

6.

Restart engine.

7.

Repeat steps 2 and 3, 5 times.

8.

Stop the vehicle and Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-198, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702922

1.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect air fuel ratio (A/F) sensor 1 harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between A/F sensor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

+

Ground

Voltage

A/F sensor 1

Connector

Terminal

F74

4

Ground

Battery voltage

P0130 A/F SENSOR 1

ECM-199

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

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4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

4.

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

REPLACE A/F SENSOR 1

Replace malfunctioning A/F sensor 1. Refer to 

EM-153, "Exploded View"

.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads.

>> INSPECTION END

+

−

Continuity

A/F sensor 1

IPDM E/R

Connector

Terminal

Connector

Terminal

F74

4

F90

105

Existed

+

−

Continuity

A/F sensor 1

ECM

Connector

Terminal

Connector

Terminal

F74

1

F16

64

Existed

2

72

+

Ground

Continuity

A/F sensor 1

Connector

Terminal

F74

1

Ground

Not existed

2

+

Ground

Continuity

ECM

Connector

Terminal

F16

64

Ground

Not existed

72

ECM-200

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0131 A/F SENSOR 1

P0131 A/F SENSOR 1

DTC Description

INFOID:0000000010702923

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately low.

POSSIBLE CAUSE

• Harness or connectors (The A/F sensor 1 circuit is open or shorted.)
• The A/F sensor 1

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10.5 V or more at idle.
Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK A/F SENSOR FUNCTION

WITH CONSULT

1.

Start engine and warm it up to normal operating temperature.

2.

Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” system with CONSULT.

3.

Check “A/F SEN1 (B1)” indication.

Is the indication constantly approx. 0 V?

YES

>> Proceed to 

ECM-201, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.

CAUTION:

Always drive vehicle at a safe speed.

3.

Maintain the following conditions for approximately 20 consecutive seconds.

NOTE:
• Keep the accelerator pedal as steady as possible during cruising.
• If this procedure is not completed within 1 minute after restarting engine at step 1, return to step 1.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0131

A/F SENSOR1 (B1)
(O2 sensor circuit low voltage bank 1 sen-
sor 1)

The output voltage computed by ECM according to the A/F sensor 1 signal 
is excessively low at all times.

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 40 km/h (25 mph)

VHCL SPEED SE

1.5 - 9.0 msec

Selector lever

Suitable position

P0131 A/F SENSOR 1

ECM-201

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

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F

G

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M

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ECM

N

P

O

YES

>> Proceed to 

ECM-201, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

4.

PERFORM COMPONENT FUNCTION CHECK

WITHOUT CONSULT

NOTE:
Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.
1.

Start engine and warm it up to normal operating temperature.

2.

Shift the lever to suitable position and drive for a few minutes at 80 km/h (50 MPH).

CAUTION:

Always drive vehicle at a safe speed.

3.

Release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (31 MPH).
NOTE:
Never apply brake when releasing the accelerator pedal.

4.

Repeat steps 2 and 3, 5 times.

5.

Stop the vehicle, turn ignition switch OFF and wait at least 10 seconds.

6.

Restart engine.

7.

Repeat steps 2 and 3, 5 times.

8.

Stop the vehicle and Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-198, "Diagnosis Procedure"

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702924

1.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect air fuel ratio (A/F) sensor 1 harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between A/F sensor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

+

Ground

Voltage

A/F sensor 1

Connector

Terminal

F74

4

Ground

Battery voltage

+

−

Continuity

A/F sensor 1

IPDM E/R

Connector

Terminal

Connector

Terminal

F74

4

F90

105

Existed

ECM-202

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0131 A/F SENSOR 1

3.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

4.

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

REPLACE A/F SENSOR 1

Replace malfunctioning A/F sensor 1. Refer to 

EM-153, "Exploded View"

.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads.

>> INSPECTION END

+

−

Continuity

A/F sensor 1

ECM

Connector

Terminal

Connector

Terminal

F74

1

F16

64

Existed

2

72

+

Ground

Continuity

A/F sensor 1

Connector

Terminal

F74

1

Ground

Not existed

2

+

Ground

Continuity

ECM

Connector

Terminal

F16

64

Ground

Not existed

72

P0132 A/F SENSOR 1

ECM-203

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

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P0132 A/F SENSOR 1

DTC Description

INFOID:0000000010702925

DTC DETECTION LOGIC

To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately high.

POSSIBLE CAUSE

• Harness or connectors (The A/F sensor 1 circuit is open or shorted.)
• A/F sensor 1

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10.5 V or more at idle.
Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

WITH CONSULT

1.

Start engine and warm it up to normal operating temperature.

2.

Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” with CONSULT.

3.

Check “A/F SEN1 (B1)” indication.

Does the indication constantly approximately 5 V?

YES

>> Proceed to 

ECM-204, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.

CAUTION:

Always drive vehicle at a safe speed.

3.

Maintain the following conditions for approximately 20 consecutive seconds.

NOTE:
• Keep the accelerator pedal as steady as possible during cruising.
• If this procedure is not completed within 1 minute after restarting engine at step 1, return to step 1.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0132

A/F SENSOR1 (B1)
(O2 sensor circuit high voltage bank 1 sen-
sor 1)

The output voltage computed by ECM according to the A/F sensor 1 signal 
is excessively high at all times.

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 40 km/h (25 mph)

VHCL SPEED SE

1.5 - 9.0 msec

Selector lever

Suitable position

ECM-204

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0132 A/F SENSOR 1

YES

>> Proceed to 

ECM-204, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

4.

PERFORM COMPONENT FUNCTION CHECK

WITHOUT CONSULT

NOTE:
Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a
1st trip DTC might not be confirmed.
1.

Start engine and warm it up to normal operating temperature.

2.

Shift the lever to suitable position and drive for a few minutes at 80 km/h (50 MPH).

CAUTION:

Always drive vehicle at a safe speed.

3.

Release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (31 MPH).
NOTE:
Never apply brake when releasing the accelerator pedal.

4.

Repeat steps 2 and 3, 5 times.

5.

Stop the vehicle, turn ignition switch OFF and wait at least 10 seconds.

6.

Restart engine.

7.

Repeat steps 2 and 3, 5 times.

8.

Stop the vehicle and Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-198, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702926

1.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect air fuel ratio (A/F) sensor 1 harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between A/F sensor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

+

Ground

Voltage

A/F sensor 1

Connector

Terminal

F74

4

Ground

Battery voltage

+

−

Continuity

A/F sensor 1

IPDM E/R

Connector

Terminal

Connector

Terminal

F74

4

F90

105

Existed

P0132 A/F SENSOR 1

ECM-205

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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3.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

4.

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

REPLACE A/F SENSOR 1

Replace malfunctioning A/F sensor 1. Refer to 

EM-153, "Exploded View"

.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads.

>> INSPECTION END

+

−

Continuity

A/F sensor 1

ECM

Connector

Terminal

Connector

Terminal

F74

1

F16

64

Existed

2

72

+

Ground

Continuity

A/F sensor 1

Connector

Terminal

F74

1

Ground

Not existed

2

+

Ground

Continuity

ECM

Connector

Terminal

F16

64

Ground

Not existed

72

ECM-206

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0137 HO2S2

P0137 HO2S2

DTC Description

INFOID:0000000010702927

DTC DETECTION LOGIC

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen storage capacity of the three way catalyst (manifold) causes the
longer switching time.

: 0.77V

To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the maximum voltage of the sensor is sufficiently high dur-
ing various driving conditions such as fuel cut.

POSSIBLE CAUSE

• Harness or connectors (The heated oxygen sensor 2 circuit is open or shorted.)
• Heated oxygen sensor 2
• Fuel pressure
• Fuel injector
• Intake air leaks

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
TESTING CONDITION:
Check that “COOLAN TEMP/S” indicates between 0

°

C to 30

°

C (30

°

F to 86

°

F) before conducting follow-

ing procedure.
Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

PERFORM DTC CONFIRMATION PROCEDURE

WITH CONSULT

1.

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT.

2.

Start engine and warm it up to the normal operating temperature.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no
load.

5.

Let engine idle for 1 minute.

6.

Check that “COOLAN TEMP/S” indicates more than 70

°

C (158

°

F).

If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches 70

°

C (158

°

F).

7.

Open engine hood.

8.

Select “O

2

 (B1) P0137” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT.

9.

Follow the instruction of CONSULT display.
NOTE:

JSBIA4446GB

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0137

HO2S2 (B1)
(O2 sensor circuit low voltage bank 1 sen-
sor 2)

The maximum voltage from the sensor does not reach the specified volt-
age.

P0137 HO2S2

ECM-207

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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It will take at most 10 minutes until “COMPLETED” is displayed.

10.  Touch “SELF-DIAG RESULTS”
Is “OK” displayed on CONSULT screen?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NG

>> Proceed to 

ECM-208, "Diagnosis Procedure"

.

CAN NOT BE DIAGNOSED>>GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

1.

Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).

2.

Perform DTC confirmation procedure again.

>> GO TO 2.

4.

PERFORM COMPONENT FUNCTION CHECK-1

WITHOUT CONSULT

NOTE:
Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this
check, a 1st trip DTC might not be confirmed.
1.

Start engine and warm it up to the normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no
load.

4.

Let engine idle for 1 minute.

5.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> GO TO 5.

5.

PERFORM COMPONENT FUNCTION CHECK-2

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> GO TO 6.

6.

PERFORM COMPONENT FUNCTION CHECK-3

Check the voltage between ECM harness connector terminals under the following conditions.

CAUTION:

ECM

Condition

Voltage

Connector

+

–

Terminal

F16

57

59

Revving up to 4,000 rpm quickly under no load 
at least 10 times. (Depress and release the ac-
celerator pedal as quickly as possible.)

The voltage should be above 0.77 V at 
least once during this procedure.
The voltage should be below 0.18 V at 
least once during this procedure.

ECM

Condition

Voltage

Connector

+

–

Terminal

F16

57

59

Keeping engine at idle for 10 minutes.

The voltage should be above 0.77 V at 
least once during this procedure.
The voltage should be below 0.18 V at 
least once during this procedure.

ECM-208

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0137 HO2S2

Always drive vehicle at a safe speed.

Is the inspection result normal?

YES-1 >> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

YES-2 >> Confirmation after repair: INSPECTION END
NO

>> Proceed to 

ECM-208, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010702928

1.

CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

1.

Start engine and warm it up to the normal operating temperature.

2.

Clear the mixture ratio self-learning value. Refer to 

ECM-131, "Work Procedure"

.

3.

Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171 detected? Is it difficult to start engine?

YES

>> Perform trouble diagnosis for DTC P0171. Refer to 

ECM-231, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

CHECK HEATED OXYGEN SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect heated oxygen sensor 2 (HO2S2) harness connector.

4.

Check the continuity between HO2S2 harness connector and ECM harness connector.

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between HO2S2 harness connector and ECM harness connector.

2.

Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and
ground.

ECM

Condition

Voltage

Connector

+

–

Terminal

F16

57

59

Coasting from 80 km/h (50 MPH) with selector 
lever in the D position (CVT), 4th gear position 
(M/T).

The voltage should be above 0.77 V at 
least once during this procedure.
The voltage should be below 0.18 V at 
least once during this procedure.

+

−

Continuity

HO2S2

ECM

Connector

Terminal

Connector

Terminal

F35

1

F16

59

Existed

+

−

Continuity

HO2S2

ECM

Connector

Terminal

Connector

Terminal

F35

2

F16

57

Existed

P0137 HO2S2

ECM-209

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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3.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK HEATED OXYGEN SENSOR 2

Refer to 

ECM-209, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning heated oxygen sensor 2. Refer to 

EX-11, "Exploded View"

.

CAUTION:

• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7

in) onto a hard surface such as a concrete floor; use a new one.

• Before installing new oxygen sensor, clean exhaust system threads.

>> INSPECTION END

Component Inspection

INFOID:0000000010702929

1.

INSPECTION START

Will CONSULT be used?

Will CONSULT be used?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEATED OXYGEN SENSOR 2-1

WITH CONSULT

1.

Select “DATA MONITOR” mode with CONSULT.

2.

Start engine and warm it up to the normal operating temperature.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no
load.

5.

Let engine idle for 1 minute.

6.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with
CONSULT.

7.

Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to 

±

 25%.

“HO2S2 (B1)/(B2)” should be above 0.77 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.18 V at least once when the “FUEL INJECTION” is +25%.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 6.

+

Ground

Continuity

HO2S2

Connector

Terminal

F35

2

Ground

Not existed

+

Ground

Continuity

ECM

Connector

Terminal

F16

57

Ground

Not existed