2007 NISSAN 350Z LAN System Workshop Manual

TROUBLE DIAGNOSIS
LAN-73
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LAN
Revision: 2006 November2007 350Z
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ABS actuator and electric unit (control unit).
2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi-
nals.
OK or NG
OK >> GO TO 3.
NG >> Repair the ABS actuator and electric unit (control unit) branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-13, "
Schematic" .
OK or NG
OK >>
Present error: Replace the ABS actuator and electric unit (control unit). Refer to BRC-36,
"Removal and Installation" .

Past error: Error was detected in the ABS actuator and electric unit (control unit) branch line.
NG >> Repair the power supply and the ground circuit.
IPDM E/R Branch Line CircuitNKS0054W
INSPECTION PROCEDURE
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).
–IPDM E/R connector
–Harness connector E108 (Models with VDC)
–Harness connector M15 (Models with VDC)
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of IPDM E/R.
2. Check the resistance between the IPDM E/R harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the IPDM E/R branch line.
ABS actuator and electric unit (control unit) harness connector
Resistance (Ω)
Connector No. Terminal No.
E51 20 23 Approx. 54 – 66
IPDM E/R harness connector
Resistance (Ω)
Connector No. Terminal No.
E9 48 49 Approx. 108 – 132

LAN-74
[CAN]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to PG-24, "
IPDM E/R Power/Ground
Circuit Inspection" .
OK or NG
OK >>
Present error: Replace the IPDM E/R. Refer to PG-26, "Removal and Installation of IPDM E/R"
.

Past error: Error was detected in the IPDM E/R branch line.
NG >> Repair the power supply and the ground circuit.
CAN Communication CircuitNKS0054X
INSPECTION PROCEDURE
1. CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect all the unit connectors on CAN communication system.
4. Check terminals and connectors for damage, bend and loose connection.
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Check the harness and repair the root cause.
3. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
OK or NG
OK >> GO TO 4.
NG >> Check the harness and repair the root cause.
Data link connector
Continuity
Connector No. Terminal No.
M8 6 14 No
Data link connector
GroundContinuity
Connector No. Terminal No.
M86No
14 No

TROUBLE DIAGNOSIS
LAN-75
[CAN]
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LAN
Revision: 2006 November2007 350Z
4. CHECK ECM AND IPDM E/R TERMINATION CIRCUIT
1. Remove the ECM and the IPDM E/R.
2. Check the resistance between the ECM terminals.
3. Check the resistance between the IPDM E/R terminals.
OK or NG
OK >> GO TO 5.
NG >> Replace the ECM and/or the IPDM E/R.
5. CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
6. CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect one of the unit connectors of CAN communication system.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.
4. 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.
ECM
Resistance (Ω)
Terminal No.
114 113 Approx. 108 – 132
IPDM E/R
Resistance (Ω)
Terminal No.
48 49 Approx. 108 – 132
LKIA0037E

LAN-76
[CAN]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z