Nissan Maxima. Manual - part 499

EC-480

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P2138 APP SENSOR

1. Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

2. Refer to 

EC-20, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-

ment"

.

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000010095192

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1. Reconnect all harness connectors disconnected.

2. Turn ignition switch ON.

3. Check the voltage between ECM harness connector terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1. Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

2. Go to 

EC-469, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000010095193

1.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to 

EC-20, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 2.

2.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 3.

3.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

ECM

Condition

Voltage (V)

Connector

+

–

Terminal

Terminal

E10

81

(APP 

sensor 1 

signal)

84

(Sensor 
ground)

Accelerator 

pedal

Fully released

0.5 - 1.0

Fully de-

pressed

4.2 - 4.8

82

(APP 

sensor 2 

signal)

100

(Sensor 
ground)

Fully released

0.25 - 0.5

Fully de-

pressed

2.0 - 2.5

JMBIA1884ZZ

P2138 APP SENSOR

EC-481

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

>> END

EC-482

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

ASCD BRAKE SWITCH

ASCD BRAKE SWITCH

Description

INFOID:0000000010095194

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-68, "System Diagram"

 for the ASCD function.

Component Function Check

INFOID:0000000010095195

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

1.

CHECK ASCD BRAKE SWITCH FUNCTION

 With CONSULT

1. Turn ignition switch ON.

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

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

 Without CONSULT

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-482, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010095196

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

1.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Turn ignition switch ON.

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

nector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal

Slightly depressed

OFF

Fully released

ON

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

E10

110

(ASCD brake 

switch signal)

112

Brake 

pedal

Slightly 
depressed

Approx. 0 V

Fully re-
leased

Battery voltage

JMBIA1881ZZ

ASCD brake switch

Ground

Voltage

Connector

Terminal

E37

1

Ground

Battery voltage

PBIB0857E

ASCD BRAKE SWITCH

EC-483

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Check the following.

• Fuse block (J/B) connector E6

• Junction block connectors E44, E46

• 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.

3.

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

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Junction block connectors E45, E46

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

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

5.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-483, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace ASCD brake switch. Refer to 

BR-18, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000010095197

1.

CHECK ASCD BRAKE SWITCH-I

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Check the continuity between ASCD brake switch terminals

under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

ASCD brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E37

2

E10

110

Existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released.

Existed

Slightly depressed.

Not existed

SEC023D