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Infiniti EX35. Manual - part 1048

LAN

IPDM-E BRANCH LINE CIRCUIT

LAN-251

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 10)]

IPDM-E BRANCH LINE CIRCUIT

Diagnosis Procedure

INFOID:0000000003515822

CHECK CONNECTOR

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Check the terminals and connectors of the IPDM E/R for damage, bend and loose connection (unit side
and connector side).

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of IPDM E/R.

Check the resistance between the IPDM E/R harness connector terminals.

Is the measurement value within the specification?

YES

>> GO TO 3.

>> Repair the IPDM E/R branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the IPDM E/R. Refer to

PCS-19, "Diagnosis Procedure"

Is the inspection result normal?

YES (Present error)>>Replace the IPDM E/R. Refer to

PCS-34, "Removal and Installation"

YES (Past error)>>Error was detected in the IPDM E/R branch line.
NO

>> Repair the power supply and the ground circuit.

IPDM E/R harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

Approx. 108 – 132

LAN-252

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 10)]

CAN COMMUNICATION CIRCUIT

CAN COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000003515823

CONNECTOR INSPECTION

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Disconnect all the unit connectors on CAN communication system.

Check terminals and connectors for damage, bend and loose connection.

Is the inspection result normal?

YES

>> GO TO 2.

>> Repair the terminal and connector.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

>> Check the harness and repair the root cause.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector and the ground.

Is the inspection result normal?

YES

>> GO TO 4.

>> Check the harness and repair the root cause.

CHECK ECM AND IPDM E/R TERMINATION CIRCUIT

Remove the ECM and the IPDM E/R.

Check the resistance between the ECM terminals.

Check the resistance between the IPDM E/R terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

>> Replace the ECM and/or the IPDM E/R.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.

Data link connector

Continuity

Connector No.

Terminal No.

M24

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M24

Not existed

ECM

Resistance (

Ω

)

Terminal No.

114

113

Approx. 108 – 132

IPDM E/R

Resistance (

Ω

)

Terminal No.

Approx. 108 – 132

LKIA0037E

LAN

CAN COMMUNICATION CIRCUIT

LAN-253

< COMPONENT DIAGNOSIS >

[CAN SYSTEM (TYPE 10)]

Inspection result

Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.
1.

Turn the ignition switch OFF.

Disconnect the battery cable from the negative terminal.

Disconnect one of the unit connectors of CAN communication system.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.

Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

LU-1

ENGINE