Nissan Tiida C11. Manual - part 559

EC-886

< COMPONENT DIAGNOSIS >

[MR18DE]

P1121 ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Turn ignition switch OFF.

2.

Remove the intake air duct.

3.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Go to 

EC-886, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000001161858

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-694, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-694, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

2.

Electric throttle control actuator

JMBIA0447ZZ

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

EC-887

< COMPONENT DIAGNOSIS >

[MR18DE]

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P1122 ELECTRIC THROTTLE CONTROL FUNCTION

Description

INFOID:0000000001161859

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.

DTC Logic

INFOID:0000000001161860

DTC DETECTION LOGIC

NOTE:
If DTC P1122 is displayed with DTC P1121 or P1126, first perform the trouble diagnosis for DTC P1121
or P1126. Refer to 

EC-891, "DTC Logic"

 or 

EC-885, "DTC Logic"

.

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 more than 11V when engine
is running.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Start engine and let it idle for 5 seconds.

3.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-887, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001161861

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E15. Refer to Ground Inspection in 

GI-58, "Circuit Inspection"

. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Check the voltage between ECM harness connector terminals as follows.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1122

Electric throttle control 
performance

Electric throttle control function does not oper-
ate properly.

• Harness or connectors

(Throttle control motor circuit is open or 
shorted)

• Electric throttle control actuator

EC-888

< COMPONENT DIAGNOSIS >

[MR18DE]

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 3.

3.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Check the voltage between ECM harness connector terminals as follows.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 4.

4.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between ECM 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

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness connectors.

6.

CHECK FUSE

1.

Disconnect 15A fuse (No. 52) from IPDM E/R.

2.

Check 15A fuse for blown.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace 15A fuse.

7.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-III

1.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

(+)

(–)

Condition

Voltage

Connector

Terminal

Connector

Terminal

F10

2

F16

108

Ignition switch OFF

Approx. 0V

Ignition switch ON

Battery voltage

(+)

(–)

Voltage

Connector

Terminal

Connector

Terminal

F10

15

E16

108

Battery voltage

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E46

46

F10

15

Existed

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E43

8

F10

2

Existed

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

EC-889

< COMPONENT DIAGNOSIS >

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2.

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

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness connectors.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-55, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.

10.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Disconnect ECM harness connector.

4.

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

5.

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

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace.

11.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 

1.

Remove the intake air duct.

2.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

12.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-890, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 14.

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F7

5

F10

1

Not existed

4

Existed

6

1

Existed

4

Not existed

2.

Electric throttle control actuator

JMBIA0447ZZ