Nissan Altima L32. Manual - part 586

P2A00, P2A03 A/F SENSOR 1

EC-1465

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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

ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.

• IPDM E/R harness connector F10

• 15 A fuse (No. 37)

• Harness for open or short between A/F sensor 1 and IPDM E/R

>> Repair or replace harness or connectors.

8.

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 power.
Is the inspection result normal?

YES

>> GO TO 9.

NO

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

DTC

A/F sensor

Ground

Voltage (V)

Bank

Connector

Terminal

P2A00

1

F12

4

Ground

Battery voltage

P2A03

2

F61

4

PBIB3308E

DTC

A/F sensor 1

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P2A00

1

F12

1

F13

45

Existed

2

49

P2A03

2

F61

1

53

2

57

DTC

A/F sensor 1

Ground

Continuity

Bank

Connector

Terminal

P2A00

1

F12

1

Ground

Not existed

2

P2A03

2

F61

1

2

DTC

ECM

Ground

Continuity

Connector

Terminal

P2A00

F13

45

Ground

Not existed

49

P2A03

53

57

EC-1466

< COMPONENT DIAGNOSIS >

[VQ35DE]

P2A00, P2A03 A/F SENSOR 1

9.

CHECK INTERMITTENT INCIDENT

Perform 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace malfunctioning part.

10.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1.

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 using Oxygen Sensor Thread

Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant

(commercial service tool).

>> INSPECTION END

ASCD BRAKE SWITCH

EC-1467

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ASCD BRAKE SWITCH

Description

INFOID:0000000004362344

When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.

ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).

Refer to 

EC-1090, "System Diagram"

 for the ASCD function.

Component Function Check

INFOID:0000000004362345

1.

CHECK ASCD BRAKE SWITCH FUNCTION

 With CONSULT-III

1. Turn ignition switch ON.

2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3. Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-III

1. Turn ignition switch ON.

2. Check the voltage between ECM harness connectors.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-1467, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004458156

1.

CHECK OVERALL FUNCTION-I

Check which type of transmission the vehicle is equipped with.
Which type of transmission?

CVT

>> GO TO 2.

M/T

>> GO TO 6.

2.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Turn ignition switch ON.

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal (CVT)
Brake pedal and clutch pedal (M/T)

Slightly depressed

OFF

Fully released

ON

ECM

Condition

Voltage

Con-

nector

+

–

Terminal

Terminal

E10

110

(ASCD 

brake 

switch 

signal)

112

Brake pedal (CVT)
Brake pedal and 
clutch pedal (M/T)

Slightly 
depressed

Approx. 0 V

Fully re-
leased

Battery voltage

JMBIA1881ZZ

EC-1468

< COMPONENT DIAGNOSIS >

[VQ35DE]

ASCD BRAKE SWITCH

4. Check the voltage between ASCD brake switch harness con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E6

• 10 A fuse (No. 3)

• Harness for open or short between ASCD brake switch and fuse

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

4.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-1470, "Component Inspection (ASCD Brake Switch)"

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace ASCD brake switch.

6.

CHECK ASCD BRAKE SWITCH CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ASCD clutch switch harness connector.

3. Turn ignition switch ON.

4. Check the voltage between ASCD clutch switch harness con-

nector and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 7.

7.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

ASCD brake switch

Ground

Voltage (V)

Connector

Terminal

E37

1

Ground

Battery voltage

PBIB0857E

ASCD brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E37

2

E10

110

Existed

ASCD clutch switch

Ground

Condition

Voltage (V)

Connector

Terminal

E39

1

Ground

Brake pedal

Slightly de-
pressed

Approx. 0

Fully released

Battery voltage

PBIB0857E