Nissan Frontier. Manual — part 981

LAN-74

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

MAIN LINE BETWEEN DLC AND ABS CIRCUIT

MAIN LINE BETWEEN DLC AND ABS CIRCUIT

Diagnosis Procedure

INFOID:0000000009479133

1.

CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (connector side

and harness side).

-

Harness connector M91

-

Harness connector E26

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the harness connectors M91 and E26.

2. Check the continuity between the data link connector and the harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the data link connector and the harness connector M91.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1. Disconnect the connector of ABS actuator and electric unit (control unit).

2. Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)

harness connector.

Is the inspection result normal?

YES (Present error)>>Check the following items again.

• Decision of CAN system type.

• Not received CONSULT data (SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR).

• Procedure for detecting root cause.

YES (Past error)>>Error was detected in the main line between the data link connector and the ABS actuator

and electric unit (control unit).

NO

>> Repair the main line between the harness connector E26 and the ABS actuator and electric unit

(control unit).

Data link connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M22

6

M91

11

Existed

14

10

Existed

Harness connector

ABS actuator and electric unit (control unit)

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E26

11

E127

12

Existed

10

13

Existed

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ECM BRANCH LINE CIRCUIT

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< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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ECM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000009479134

1.

CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con-

nector side).

-

M/T models

•

ECM

•

Harness connector E152

•

Harness connector M31

-

A/T models

•

ECM

•

Harness connector E2

•

Harness connector F32

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

-

QR engine models

-

VQ engine models except for Mexico

-

VQ engine models for Mexico

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the ECM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to the following.

• QR25DE:

EC-146, "Diagnosis Procedure"

• VQ40DE except for Mexico:

EC-615, "Diagnosis Procedure"

• VQ40DE for Mexico:

EC-1091, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to the following.

• QR25DE:

EC-121, "Procedure After Replacing ECM"

• VQ40DE except for Mexico:

EC-588, "Additional Service When Replacing ECM"

• VQ40DE for Mexico:

EC-1072, "Additional Service When Replacing ECM"

YES (Past error)>>Error was detected in the ECM branch line.

NO

>> Repair the power supply and the ground circuit.

ECM harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E16

98

97

Approx. 108 – 132

ECM harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E55

114

113

Approx. 108 – 132

ECM harness connector

Resistance (

Ω)

Connector No.

Terminal No.

E8

94

86

Approx. 108 – 132

LAN-76

< DTC/CIRCUIT DIAGNOSIS >

[CAN]

TCM BRANCH LINE CIRCUIT

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000009479135

1.

CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the A/T assembly for damage, bend and loose connection (unit

side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of A/T assembly.

2. Check the resistance between the A/T assembly harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the TCM branch line.

3.

CHECK HARNESS FOR OPEN CIRCUIT

1. Remove the control valve with TCM. Refer to

TM-288, "Removal and Installation"

.

2. Disconnect the connector of TCM.

3. Check the continuity between the A/T assembly harness connector and TCM harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harness between the A/T assembly harness connector and the TCM harness connec-

tor.

4.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the TCM. Refer to

TM-218, "Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the control valve with TCM. Refer to

TM-288, "Removal and Installation"

.

YES (Past error)>>Error was detected in the TCM branch line.

NO

>> Repair the power supply and the ground circuit.

A/T assembly harness connector

Resistance (

Ω)

Connector No.

Terminal No.

F9

3

8

Approx. 54 – 66

A/T assembly harness connec-

tor

TCM harness connector

Continuity

Terminal No.

Connector No.

Terminal No.

3

F502

1

Existed

8

2

Existed

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AV BRANCH LINE CIRCUIT

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< DTC/CIRCUIT DIAGNOSIS >

[CAN]

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AV BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000009479136

1.

CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the terminals and connectors of the AV control unit for damage, bend and loose connection (unit

side and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of AV control unit.

2. Check the resistance between the AV control unit harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

NO

>> Repair the AV control unit branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the AV control unit. Refer to

AV-305, "AV CONTROL UNIT :

Diagnosis Procedure"

.

Is the inspection result normal?

YES (Present error)>>Replace the AV control unit. Refer to

AV-348, "Removal and Installation"

.

YES (Past error)>>Error was detected in the AV control unit branch line.

NO

>> Repair the power supply and the ground circuit.

AV control unit harness connector

Resistance (

Ω)

Connector No.

Terminal No.

M96

8

17

Approx. 54 – 66