Infiniti M45 (Y34). Manual - part 621

CAN SYSTEM (TYPE 2)

LAN-51

[CAN]

C

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LAN

Circuit Check Between ICC Unit and Data Link Connector

AKS003YM

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection (connector side and
harness side).

–

Harness connector B211

–

Harness connector M141

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect harness connector B211.

2.

Check continuity between harness connector B211 terminals
52V (L), 53V (R) and harness connector B211 terminals 66V (L),
61V (R).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness.

3. 

CHECK HARNESS FOR OPEN CIRCUIT

Check continuity between harness connector M141 terminals 66V
(L), 61V (R) and data link connector M31 terminals 6 (L), 3 (R).

OK or NG

OK

>> Connect all the connectors and diagnose again. Refer to

LAN-43, "Work Flow"

 .

NG

>> Repair harness.

ECM Circuit Check

AKS003YE

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection (control module side
and harness side).

–

ECM connector

–

Harness connector F105

–

Harness connector M135

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

52V (L) – 66V (L)

: Continuity should exist.

53V (R) – 61V (R)

: Continuity should exist.

SKIA3883E

66V (L) – 6 (L)

: Continuity should exist.

61V (R) – 3 (R)

: Continuity should exist.

SKIA3884E

LAN-52

[CAN]

CAN SYSTEM (TYPE 2)

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect ECM connector.

2.

Check resistance between ECM harness connector F102 termi-
nals 174 (L) and 171 (R).

OK or NG

OK

>> Replace ECM.

NG

>> Repair harness between ECM and harness connector

M141.

VDC/TCS/ABS Control Unit Circuit Check

AKS003YF

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection (control unit side and
harness side).

–

VDC/TCS/ABS control unit connector

–

Harness connector E222

–

Harness connector M132

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect VDC/TCS/ABS control unit connector.

2.

Check resistance between VDC/TCS/ABS control unit harness
connector E218 terminals 61 (L) and 63 (R).

OK or NG

OK

>> Replace VDC/TCS/ABS control unit.

NG

>> Repair harness between VDC/TCS/ABS control unit and

harness connector M141.

ICC Sensor Circuit Check

AKS003YN

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection (sensor side and har-
ness side).

–

ICC sensor connector

–

Harness connector E205

–

Harness connector M15

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

174 (L) – 171 (R) 

: Approx. 108 – 132

Ω

PKIA0279E

61 (L) – 63 (R) 

: Approx. 54 – 66

Ω

PKIA0280E

CAN SYSTEM (TYPE 2)

LAN-53

[CAN]

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LAN

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect ICC sensor connector.

2.

Check resistance between ICC sensor harness connector E52
terminals 3 (L) and 6 (R).

OK or NG

OK

>> Replace ICC sensor.

NG

>> Repair harness between ICC sensor and harness con-

nector M141.

ICC Unit Circuit Check

AKS003YO

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check terminals and connector of ICC unit for damage, bend and loose connection (unit side and harness
side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect ICC unit connector.

2.

Check resistance between ICC unit harness connector B243 ter-
minals 14 (L) and 5 (R).

OK or NG

OK

>> Replace ICC unit.

NG

>> Repair harness between ICC unit and harness connec-

tor B211.

TCM Circuit Check

AKS003YG

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check following terminals and connector for damage, bend and loose connection (control module side
and harness side).

–

TCM connector

–

Harness connector F105

–

Harness connector M135

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

3 (L) – 6 (R) 

: Approx. 54 – 66

Ω

SKIA1263E

14 (L) – 5 (R) 

: Approx. 54 – 66

Ω

SKIA3899E

LAN-54

[CAN]

CAN SYSTEM (TYPE 2)

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect TCM connector.

2.

Check resistance between TCM harness connector F103 termi-
nals 6 (L) and 7 (R).

OK or NG

OK

>> Replace TCM.

NG

>> Repair harness between TCM and data link connector.

Steering Angle Sensor Circuit Check

AKS003YH

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check terminals and connector of steering angle sensor for damage, bend and loose connection (sensor
side and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

2. 

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect steering angle sensor connector.

2.

Check resistance between steering angle sensor harness con-
nector M52 terminals 4 (L) and 5 (R).

OK or NG

OK

>> Replace steering angle sensor.

NG

>> Repair harness between steering angle sensor and

combination meter.

Combination Meter Circuit Check

AKS003YI

1. 

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

Check terminals and connector of combination meter for damage, bend and loose connection (meter side
and harness side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair terminal or connector.

6 (L) – 7 (R) 

: Approx. 54 – 66

Ω

PKIA0283E

4 (L) – 5 (R)

: Approx. 54 – 66

Ω

SKIA3777E