Infiniti F50. Manual — part 627
CAN SYSTEM (FOR VDC MODELS)
LAN-37
[CAN]
C
D
E
F
G
H
I
J
L
M
A
B
LAN
5.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between Data Link Connector M31 terminals 6 (LG/
B), 3(P/B) and ground.
OK or NG
OK
>> GO TO 6.
NG
>>
●
Repair harness between harness connector M6 and
harness connector M135.
●
Repair harness between harness connector M6 and
Data Link Connector.
●
Repair harness between harness connector M6 and combination meter.
●
Repair harness between harness connector M6 and steering angle sensor.
6.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect harness connector B63.
2.
Check continuity between harness connector B6 terminals
23(LG/B) and 24(P/B).
OK or NG
OK
>> GO TO 7.
NG
>> Repair harness between harness connector B6 and har-
ness connector B63.
7.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between harness connector B6 terminals 23(LG/B),
24(P/B) and ground.
OK or NG
OK
>> GO TO 8.
NG
>> Repair harness between harness connector B6 and har-
ness connector B63.
6(LG/B) – ground
: Continuity should not exist.
3(P/B) – ground
: Continuity should not exist.
PKIA0286E
23(LG/B) – 24(P/B)
: Continuity should not exist.
PKIA0287E
23(LG/B) – ground
: Continuity should not exist.
24(P/B) – ground
: Continuity should not exist.
PKIA0288E
LAN-38
[CAN]
CAN SYSTEM (FOR VDC MODELS)
8.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect harness connector B204.
2.
Check continuity between harness connector B263 terminals
9(LG/B) and 8(P/B).
OK or NG
OK
>> GO TO 9.
NG
>> Repair harness between harness connector B263 and
harness connector B204.
9.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between harness connector B263 terminals 9(LG/
B), 8(P/B) and ground.
OK or NG
OK
>> GO TO 10.
NG
>> Repair harness between harness connector B263 and
harness connector B204.
10.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect VDC/TCS/ABS control unit connector and harness connector E34.
2.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 terminals 61 (LG/B) and 63(P/B).
OK or NG
OK
>> GO TO 11.
NG
>>
●
Repair harness between harness connector E34 and
harness connector E224.
●
Repair harness between harness connector E34 and
VDC/TCS/ABS control unit.
11.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between VDC/TCS/ABS control unit harness con-
nector E218 terminals 61 (LG/B), 63(P/B) and ground.
OK or NG
OK
>> GO TO 12.
NG
>>
●
Repair harness between harness connector E34 and
harness connector E224.
●
Repair harness between harness connector E34 and
VDC/TCS/ABS control unit.
9(LG/B) – 8(P/B)
: Continuity should not exist.
PKIA0289E
9(LG/B) – ground
: Continuity should not exist.
8(P/B) – ground
: Continuity should not exist.
PKIA0290E
61(LG/B) – 63(P/B)
: Continuity should not exist.
PKIA0280E
61(LG/B) – ground
: Continuity should not exist.
63(P/B) – ground
: Continuity should not exist.
PKIA0291E
CAN SYSTEM (FOR VDC MODELS)
LAN-39
[CAN]
C
D
E
F
G
H
I
J
L
M
A
B
LAN
12.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect ECM connector.
2.
Check continuity between ECM harness connector F102 termi-
nals 174 (LG/B) and 171(P/B).
OK or NG
OK
>> GO TO 13.
NG
>> Repair harness between ECM and harness connector
F34.
13.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between ECM harness connector F102 terminals
174 (LG/B), 171 (P/B) and ground.
OK or NG
OK
>> GO TO 14.
NG
>> Repair harness between ECM and harness connector
F34.
14.
ECM/TCM INTERNAL CIRCUIT INSPECTION
Check components inspection. Refer to
LAN-39, "ECM/TCM INTERNAL CIRCUIT INSPECTION"
OK or NG
OK
>> Reconnect all connectors to perform “SELF-DIAG RESULTS” and “DATA MONITOR” for
“ENGINE”, “A/T”, and “VDC”. Refer to the following:
●
EC-141, "DTC U1000, U1001 CAN COMMUNICATION LINE"
for “ENGINE”
●
AT-99, "DTC U1000 CAN COMMUNICATION LINE"
for “A/T”
●
for “VDC”
NG
>> Replace ECM and/or TCM.
Component Inspection
EKS003LJ
ECM/TCM INTERNAL CIRCUIT INSPECTION
●
Remove ECM and TCM from vehicle.
●
Check resistance between ECM terminals 174 and 171.
●
Check resistance between TCM terminals 6 and 7.
174(LG/B) – 171(P/B)
: Continuity should not exist.
PKIA0279E
174(LG/B) – ground
: Continuity should not exist.
171(P/B) – ground
: Continuity should not exist.
PKIA0292E
Unit
Terminal
Resistance value (
Ω
)
ECM
174 – 171
Approx. 108 - 132
TCM
6 – 7
PKIA0298E
LAN-40
[CAN]
CAN SYSTEM (FOR ICC MODELS)
CAN SYSTEM (FOR ICC MODELS)
PFP:18995
System Description
EKS003LX
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector Location
EKS003LY
SKIA3778E
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