control unit INFINITI M35 2007 Factory Service Manual

LAN-86
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of RAS control unit.
2. Check the continuity between the harness connector and the RAS control unit harness connector.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the data link connector and the RAS
control unit.
NG >> Replace the body No. 2 harness.
Main Line Between RAS Control Unit and Pre-crash Seat Belt Control UnitNKS004GZ
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 (connector side
and harness side).
–Harness connector B437
–Harness connector B67
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of RAS control unit and the harness connectors B437 and B67.
2. Check the continuity between the RAS control unit harness connector and the harness connector.
OK or NG
OK >> GO TO 3.
NG >> Replace the body No. 2 harness.
Harness connector RAS control unit harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B41838P
B4761Yes
39P 8 Yes
RAS control unit harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B4761
B4371Yes
812Yes

TROUBLE DIAGNOSIS
LAN-87
[CAN]
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LAN
Revision: 2007 April2007 M35/M45
3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the connector of pre-crash seat belt control unit.
2. Check the continuity between the harness connector and the pre-crash seat belt control unit harness con-
nector.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the RAS control unit and the pre-crash
seat belt control unit.
NG >> Replace the body harness.
Main Line Between Pre-crash Seat Belt Control Unit and Driver Seat Control
Unit
NKS004G8
INSPECTION PROCEDURE
1. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
–ECM harness connector
–Pre-crash seat belt control unit harness connector
–Harness connector B15 and B202
4. Check continuity between the pre-crash seat belt control unit harness connector and the harness connec-
tor.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the pre-crash seat belt control unit and
the driver seat control unit.
NG >> Replace the body harness.
Harness connectorPre-crash seat belt control unit
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B671
B14224 Yes
12 22 Yes
Pre-crash seat belt control unit
harness connectorHarness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B14224
B153Yes
22 19 Yes

LAN-88
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Main Line Between Driver Seat Control Unit and ABS Actuator and Electric Unit
(Control Unit)
NKS004G9
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 (connector side
and harness side).
–Harness connector B3
–Harness connector E105
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
–Harness connectors B202 and B15
–Harness connectors B3 and E105
2. Check the continuity between harness connectors.
OK or NG
OK >> GO TO 3.
NG >> Replace the body harness.
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.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the driver seat control unit and the ABS
actuator and electric unit (control unit).
NG >> Repair the main line between the harness connector E105 and the ABS actuator and electric unit
(control unit).
Harness connector Harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
B153
B39Yes
19 8 Yes
Harness connectorABS actuator and electric unit (control unit)
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E1059
E3035 Yes
814Yes

TROUBLE DIAGNOSIS
LAN-89
[CAN]
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Revision: 2007 April2007 M35/M45
Main Line Between ABS Actuator and Electric Unit (Control Unit) and ICC Sen-
sor Integrated Unit
NKS004H0
INSPECTION PROCEDURE
1. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect the following harness connectors.
–ABS actuator and electric unit (control unit) harness connector
–ICC sensor integrated unit harness connector
–IPDM E/R harness connector
4. Check continuity between the ABS actuator and electric unit (control unit) harness connector and the ICC
sensor integrated unit harness connector.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the main line between the ABS actuator and electric unit (con-
trol unit) and the ICC sensor integrated unit.
NG >> Repair the main line between the ABS actuator and electric unit (control unit) and the ICC sensor
integrated unit.
ECM Branch Line CircuitNKS004GA
INSPECTION PROCEDURE
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 ECM for damage, bend and loose connection (unit side and
connector side).
OK or NG
OK >> GO TO 2.
NG >> 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.
OK or NG
OK >> GO TO 3.
NG >> Repair the ECM branch line.
ABS actuator and electric unit (control unit)
harness connectorICC sensor integrated unit
harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
E3035
E613Yes
14 6 Yes
ECM harness connector
Resistance (Ω)
Connector No. Terminal No.
M71 94 86 Approx. 108 – 132

LAN-90
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to EC-154, "
POWER SUPPLY AND
GROUND CIRCUIT" (VQ engine), EC-858, "POWER SUPPLY AND GROUND CIRCUIT" (VK engine).
OK or NG
OK >>
Present error: Replace the ECM. Refer to EC-85, "Procedure After Replacing ECM" (VQ
engine), EC-787, "
Procedure After Replacing ECM" (VK engine).

Past error: Error was detected in the ECM branch line.
NG >> Repair the power supply and the ground circuit.
AWD Control Unit Branch Line CircuitNKS004GL
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).
–AWD control unit connector
–Harness connector F102
–Harness connector M72
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of AWD control unit.
2. Check the resistance between the AWD control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the AWD control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AWD control unit. Refer to TF-16, "
Circuit Diagram" .
OK or NG
OK >>
Present error: Replace the AWD control unit. Refer to TF-39, "Removal and Installation" .

Past error: Error was detected in the AWD control unit branch line.
NG >> Repair the power supply and the ground circuit.
AWD control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
F109 8 16 Approx. 54 – 66

TROUBLE DIAGNOSIS
LAN-91
[CAN]
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Revision: 2007 April2007 M35/M45
AFS Control Unit Branch Line CircuitNKS004H1
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).
–AFS control unit connector
–Harness connector F102
–Harness connector M72
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of AFS control unit.
2. Check the resistance between the AFS control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the AFS control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AFS control unit. Refer to LT- 1 4 2 , "
Schematic" .
OK or NG
OK >>
Present error: Replace the AFS control unit. Refer to LT- 1 9 2 , "Removal and Installation of AFS
Control Unit" .

Past error: Error was detected in the AFS control unit branch line.
NG >> Repair the power supply and the ground circuit.
BCM Branch Line CircuitNKS004GD
INSPECTION PROCEDURE
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 BCM for damage, bend and loose connection (unit side and
connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
AFS control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
F110 30 7 Approx. 54 – 66

TROUBLE DIAGNOSIS
LAN-93
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Revision: 2007 April2007 M35/M45
TCM Branch Line CircuitNKS004GK
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).
–A/T assembly connector
–Harness connector F102
–Harness connector M72
OK or NG
OK >> GO TO 2.
NG >> 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.
OK or NG
OK >> GO TO 3.
NG >> Repair the TCM branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to AT- 1 8 0 , "
MAIN POWER SUPPLY AND
GROUND CIRCUIT" .
OK or NG
OK >>
Present error: Replace the control valve with TCM.

Past error: Error was detected in the TCM branch line.
NG >> Repair the power supply and the ground circuit.
NAVI Control Unit Branch Line CircuitNKS004GI
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).
–NAVI control unit connector
–Harness connector M216
–Harness connector M53
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
A/T assembly harness connector
Resistance (Ω)
Connector No. Terminal No.
F42 3 8 Approx. 54 – 66

LAN-94
[CAN]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of NAVI control unit.
2. Check the resistance between the NAVI control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the NAVI control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply, ignition signal and the ground circuit of the NAVI control unit. Refer to AV- 1 7 1 , "
Sche-
matic — BOSE Surround Audio 5.1ch System —" .
OK or NG
OK >>
Present error: Replace the NAVI control unit. Refer to AV- 2 8 2 , "AV ( N AV I ) C o n t r o l U n i t" .

Past error: Error was detected in the NAVI control unit branch line.
NG >> Repair the power supply and the ground circuit.
AV Control Unit Branch Line CircuitNKS004HO
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).
–AV control unit connector
–Harness connector M216
–Harness connector M53
OK or NG
OK >> GO TO 2.
NG >> 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.
OK or NG
OK >> GO TO 3.
NG >> Repair the AV control unit branch line.
NAVI control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M210 71 72 Approx. 54 – 66
AV control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M210 71 72 Approx. 54 – 66

TROUBLE DIAGNOSIS
LAN-95
[CAN]
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LAN
Revision: 2007 April2007 M35/M45
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply, ignition signal and the ground circuit of the AV control unit. Refer to AV- 4 2 , "
Sche-
matic — BOSE Surround Audio 5.1ch System —" .
OK or NG
OK >>
Present error: Replace the AV control unit. Refer to AV- 1 3 1 , "AV ( N AV I ) C o n t r o l U n i t" .

Past error: Error was detected in the AV control unit branch line.
NG >> Repair the power supply and the ground circuit.
Data Link Connector Branch Line CircuitNKS004GE
INSPECTION PROCEDURE
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 data link connector for damage, bend and loose connection (con-
nector side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the data link connector branch line circuit.
NG >> Repair the data link connector branch line.
Intelligent Key Unit Branch Line CircuitNKS004GF
INSPECTION PROCEDURE
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 Intelligent Key unit for damage, bend and loose connection
(unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M60 6 14 Approx. 54 – 66

TROUBLE DIAGNOSIS
LAN-97
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Revision: 2007 April2007 M35/M45
Steering Angle Sensor Branch Line CircuitNKS004GH
INSPECTION PROCEDURE
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 steering angle sensor for damage, bend and loose connection
(unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of steering angle sensor.
2. Check the resistance between the steering angle sensor harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the steering angle sensor branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-14, "
Schematic"
(Models with VDC), LT- 1 4 2 , "Schematic" (Models with AFS).
OK or NG
OK >>
Present error: Replace the steering angle sensor. Refer to BRC-60, "Removal and Installation" .

Past error: Error was detected in the steering angle sensor branch line.
NG >> Repair the power supply and the ground circuit.
Low Tire Pressure Warning Control Unit Branch Line CircuitNKS004H3
INSPECTION PROCEDURE
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 low tire pressure warning control unit for damage, bend and
loose connection (unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
Steering angle sensor harness connector
Resistance (Ω)
Connector No. Terminal No.
M47 4 5 Approx. 54 – 66