bcm INFINITI FX35 2004 Service Manual

LAN-78
[CAN]
CAN SYSTEM (TYPE 2)
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect display unit connector.
2. Check resistance between display unit harness connector M62
terminals 14 (L) and 16 (R).
OK or NG
OK >> Replace display unit.
NG >> Repair harness between display unit and harness con-
nector M82.
Data Link Connector Circuit CheckAKS00C01
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check data link connector and terminals for damage, bend and loose connection (connector side and har-
ness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check resistance between data link connector M5 terminals 6 (L)
and 14 (R).
OK or NG
OK >> Diagnose again. Refer to LAN-55, "Work Flow" .
NG >> Repair harness between data link connector and BCM.
BCM Circuit CheckAKS00C02
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of BCM for damage, bend and loose connection (control module side and
harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.14 (L) - 16 (R) : Approx. 54 - 66Ω
SKIA6867E
6 (L) - 14 (R) : Approx. 54 - 66Ω
SKIA6868E

CAN SYSTEM (TYPE 2)
LAN-79
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect BCM connector.
2. Check resistance between BCM harness connector M3 termi-
nals 39 (L) and 40 (R).
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Repair harness between BCM and data link connector.
Steering Angle Sensor Circuit CheckAKS00C03
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. 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 M14 terminals 4 (L) and 5 (R).
OK or NG
OK >> Replace steering angle sensor.
NG >> Repair harness between steering angle sensor and data
link connector.
Unified Meter and A/C Amp. Circuit CheckAKS00C04
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of unified meter and A/C amp. for damage, bend and loose connection
(meter side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.39 (L) - 40 (R) : Approx. 54 - 66Ω
SKIA6869E
4 (L) - 5 (R) : Approx. 54 - 66Ω
SKIA6870E

LAN-82
[CAN]
CAN SYSTEM (TYPE 2)
Revision: 2004 November 2004 FX35/FX45
CAN Communication Circuit CheckAKS00C08
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connectors for damage, bend and loose connection (control module side,
unit side, sensor side, meter side, control unit side and harness side).
–ECM
–A/T assembly
–Display unit
–BCM
–Steering angle sensor
–Unified meter and A/C amp.
–ABS actuator and electric unit (control unit)
–Driver seat control unit
–IPDM E/R
–Between ECM and IPDM E/R
–Between ECM and A/T assembly
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect following connectors.
–ECM connector
–Harness connector M82
–Display unit connector
–BCM connector
–Steering angle sensor connector
–Unified meter and A/C amp. connector
–Harness connector M41
2. Check continuity between data link connector M5 terminals 6 (L)
and 14 (R).
OK or NG
OK >> GO TO 3.
NG >> Check the following harnesses. If any harness is dam-
aged, repair the harness.

Harness between data link connector and ECM

Harness between data link connector and harness
connector M82

Harness between data link connector and display unit

Harness between data link connector and BCM

Harness between data link connector and steering angle sensor

Harness between data link connector and unified meter and A/C amp.

Harness between data link connector and harness connector M41 6 (L) - 14 (R) : Continuity should not exist.
SKIA6868E

CAN SYSTEM (TYPE 2)
LAN-83
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
3. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between data link connector M5 terminals 6 (L), 14
(R) and ground.
OK or NG
OK >> GO TO 4.
NG >> Check the following harnesses. If any harness is dam-
aged, repair the harness.

Harness between data link connector and ECM

Harness between data link connector and harness
connector M82

Harness between data link connector and display unit

Harness between data link connector and BCM

Harness between data link connector and steering angle sensor

Harness between data link connector and unified meter and A/C amp.

Harness between data link connector and harness connector M41
4. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect A/T assembly connector.
2. Check continuity between A/T assembly harness connector F44
terminals 3 (L) and 8 (R).
OK or NG
OK >> GO TO 5.
NG >> Repair harness between A/T assembly and harness
connector F102.
5. CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between A/T assembly harness connector F44 ter-
minals 3 (L), 8 (R) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness between A/T assembly and harness
connector F102. 6 (L) - Ground : Continuity should not exist.
14 (R) - Ground : Continuity should not exist.
SKIA6874E
3 (L) - 8 (R) : Continuity should not exist.
SKIA6866E
3 (L) - Ground : Continuity should not exist.
8 (R) - Ground : Continuity should not exist.
SKIA6875E

LAN-92
[CAN]
CAN SYSTEM (TYPE 3)
Revision: 2004 November 2004 FX35/FX45
Work FlowAKS00C0F
1. When there are no indications of “AIR PRESSURE MONITOR”, “INTELLIGENT KEY”, “BCM”, “METER A/
C AMP”, “AUTO DRIVE POS.” or “IPDM E/R” on “SELECT SYSTEM” display of CONSULT-II, print the
“SELECT SYSTEM”.
2. Print all the data of “SELF-DIAG RESULTS” for “ENGINE”, “A/T”, “AIR PRESSURE MONITOR”, “ICC”,
“INTELLIGENT KEY”, “BCM”, “METER A/C AMP”, “ABS”, “AUTO DRIVE POS.”, and “IPDM E/R” dis-
played on CONSULT-II.
3. Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “A/T”, “AIR PRESSURE MONITOR”,
“ICC”, “INTELLIGENT KEY”, “BCM”, “METER A/C AMP”, “ABS”, “AUTO DRIVE POS.”, and “IPDM E/R”
displayed on CONSULT-II.
4. Attach the printed sheet of “SELECT SYSTEM”, “SELF-DIAG RESULTS” and “CAN DIAG SUPPORT
MNTR” onto the check sheet. Refer to LAN-94, "
CHECK SHEET" .
5. Based on the indications of “SELECT SYSTEM” and the results of “CAN DIAG SUPPORT MNTR”, put
marks “v” onto the items with “No indication”, “NG”, or “UNKWN” in the check sheet table. Refer to LAN-
94, "CHECK SHEET" .
NOTE:

If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” as “CAN DIAG SUPPORT MNTR” for the diag-
nosed control unit, replace the control unit.

The “CAN DIAG SUPPORT MNTR” items, which are not in check sheet table, are not related to diag-
nostic procedure on service manual.
So it is not necessary to check the status of “CAN DIAG SUPPORT MNTR” items which are not indi-
cated in check sheet table.
6. Check CAN communication line of the navigation system. Refer to AV- 1 5 8 , "
CAN Communication Line
Check" .
PKIA2093E
PKIA8260E
PKIA8343E

LAN-108
[CAN]
CAN SYSTEM (TYPE 3)
Revision: 2004 November 2004 FX35/FX45
Case 12
Check BCM circuit. Refer to LAN-122, "BCM Circuit Check" .
PKIA7975E
SKIA6595E

LAN-122
[CAN]
CAN SYSTEM (TYPE 3)
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check resistance between Intelligent Key unit harness connec-
tor M34 terminals 2 (L) and 3 (R).
OK or NG
OK >> Replace Intelligent Key unit.
NG >> Repair harness between Intelligent Key unit and data
link connector.
Data Link Connector Circuit CheckAKS00C0Q
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check data link connector and terminals for damage, bend and loose connection (connector side and har-
ness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check resistance between data link connector M5 terminals 6 (L)
and 14 (R).
OK or NG
OK >> Diagnose again. Refer to LAN-92, "Work Flow" .
NG >> Repair harness between data link connector and BCM.
BCM Circuit CheckAKS00C0R
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of BCM for damage, bend and loose connection (control module side and
harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.2 (L) - 3 (R) : Approx. 54 - 66Ω
SKIA6887E
6 (L) - 14 (R) : Approx. 54 - 66Ω
SKIA6868E

CAN SYSTEM (TYPE 3)
LAN-123
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect BCM connector.
2. Check resistance between BCM harness connector M3 termi-
nals 39 (L) and 40 (R).
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Repair harness between BCM and data link connector.
Steering Angle Sensor Circuit CheckAKS00C0S
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. 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 M14 terminals 4 (L) and 5 (R).
OK or NG
OK >> Replace steering angle sensor.
NG >> Repair harness between steering angle sensor and data
link connector.
Unified Meter and A/C Amp. Circuit CheckAKS00C0T
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check terminals and connector of unified meter and A/C amp. for damage, bend and loose connection
(meter side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.39 (L) - 40 (R) : Approx. 54 - 66Ω
SKIA6869E
4 (L) - 5 (R) : Approx. 54 - 66Ω
SKIA6870E

CAN SYSTEM (TYPE 3)
LAN-127
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
CAN Communication Circuit CheckAKS00C0Y
1. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal.
3. Check following terminals and connectors for damage, bend and loose connection (control module side,
control unit side, unit side, sensor side, meter side and harness side).
–ECM
–A/T assembly
–Display control unit
–Low tire pressure warning control unit
–ICC unit
–Intelligent Key unit
–BCM
–Steering angle sensor
–Unified meter and A/C amp.
–ICC sensor
–ABS actuator and electric unit (control unit)
–Driver seat control unit
–IPDM E/R
–Between ECM and IPDM E/R
–Between ECM and A/T assembly
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.

LAN-128
[CAN]
CAN SYSTEM (TYPE 3)
Revision: 2004 November 2004 FX35/FX45
2. CHECK HARNESS FOR SHORT CIRCUIT
1. Disconnect following connectors.
–ECM connector
–Harness connector M82
–Display control unit connector
–Low tire pressure warning control unit connector
–ICC unit connector
–Intelligent Key unit connector
–BCM connector
–Steering angle sensor connector
–Unified meter and A/C amp. connector
–Harness connector M41
2. Check continuity between data link connector M5 terminals 6 (L)
and 14 (R).
OK or NG
OK >> GO TO 3.
NG >> Check the following harnesses. If any harness is dam-
aged, repair the harness.

Harness between data link connector and ECM

Harness between data link connector and harness
connector M82

Harness between data link connector and display control unit

Harness between data link connector and low tire pressure warning control unit

Harness between data link connector and ICC unit

Harness between data link connector and Intelligent Key unit

Harness between data link connector and BCM

Harness between data link connector and steering angle sensor

Harness between data link connector and unified meter and A/C amp.

Harness between data link connector and harness connector M41 6 (L) - 14 (R) : Continuity should not exist.
SKIA6868E