Infiniti M45 (Y34). Manual — part 23
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-85
[ICC]
C
D
E
F
G
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J
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M
A
B
ACS
7.
CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check voltage between ICC brake hold relay harness connector
E38 terminal 4 (R/B) and ground.
OK or NG
NG
>>
●
Malfunction of fuse, or ICC brake hold relay power
supply system harness.
●
After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
OK
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
8.
CHECK BRAKE LAMP ILLUMINATION
1.
Turn ignition switch OFF.
2.
Disconnect ICC brake hold relay connector.
3.
Check stop lamp circuit.
OK or NG
NG
>> After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of ICC
system again.
OK
>> GO TO 9.
9.
CHECK ICC BRAKE HOLD RELAY CIRCUIT
1.
Connect ICC brake hold relay connector.
2.
Disconnect stop lamp switch connector.
3.
When brake pedal is not depressed, make sure that stop lamp does not illuminate.
OK or NG
NG
>> GO TO 10.
OK
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
10.
CHECK ICC BRAKE HOLD RELAY
1.
Disconnect ICC brake hold relay.
2.
Check continuity between ICC brake hold relay terminal 6 and
terminal 7.
OK or NG
NG
>> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system again.
OK
>> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
Approx. 12V
SKIA1194E
Continuity should not exist.
SKIA1195E
ACS-86
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
11.
CHECK HARNESS THROUGH ICC UNIT, ICC BRAKE HOLD RELAY, AND GROUND
1.
Disconnect connectors of ICC unit and ICC brake hold relay.
2.
Check continuity between ICC unit harness connector B244 ter-
minal 47 (L/W) and ICC brake hold relay harness connector E38
terminal 1 (L/W).
3.
Check continuity between ICC unit harness connector B244 ter-
minal 47 (L/W) and ground.
4.
Check continuity between ICC brake hold relay harness connec-
tor E38 terminal 2 (B) and ground.
OK or NG
NG
>>
●
Repair harness through ICC unit, ICC brake hold
relay, and ground
●
After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
OK
>> GO TO 12.
12.
CHECK ICC BRAKE HOLD RELAY
●
Check continuity between ICC brake hold relay terminal 1 and
terminal 2.
OK or NG
NG
>> Replace ICC brake hold relay. Erase DTC and perform
ICC system running test. Then perform self-diagnosis of
ICC system again.
OK
>> GO TO 13.
13.
CHECK ICC UNIT STANDARD VOLTAGE
With CONSULT-II
1.
Connect connectors of ICC unit and stop lamp switch.
2.
Active test (STOP LAMP:STP LMP DRIVE ON) with CONSULT-
II, check voltage between ICC unit harness connector B244 ter-
minal 47 (L/W) and ground.
OK or NG
NG
>> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
OK
>> GO TO 14.
47 - 1
Continuity should exist.
47 - Ground
Continuity should not exist.
SKIA1272E
Continuity should exist.
SKIA1271E
Continuity should exist.
SKIA1197E
47 - Ground
Approx. 12V (during active
test)
SKIA3075E
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-87
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
14.
CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1.
Check voltage between ICC brake hold relay harness connector
E38 terminal 6 (L/B) and ground.
OK or NG
NG
>>
●
Malfunctions of fuse or ICC brake hold relay power
supply harness.
●
After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
OK
>> GO TO 15.
15.
CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ICC UNIT
1.
Disconnect connectors of ICC brake hold relay and ICC unit.
2.
Check continuity between ICC brake hold relay harness connec-
tor E38 terminal 7 (R/W) and ICC unit harness connector B244
terminal 38 (R/W).
3.
Check continuity between ICC unit harness connector B244 ter-
minal 38 (R/W) and ground.
OK or NG
NG
>>
●
Repair harness between ICC brake hold relay and ICC unit.
●
After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
OK
>> GO TO 16.
16.
CHECK ICC BRAKE HOLD RELAY
With CONSULT-ll
1.
Connect connectors of ICC unit and ICC brake hold relay.
2.
Disconnect stop lamp switch connector.
3.
Perform active test (STOP LAMP) with CONSULT-II, and make sure that stop lamp is illuminated.
OK or NG
NG
>> Replace ICC brake hold relay. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
OK
>> GO TO 17.
6 - Ground
Approx. 12V
SKIA1198E
7 - 38
Continuity should exist.
38 - Ground
Continuity should not exist.
SKIA1199E
ACS-88
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
17.
CHECK ICC UNIT STANDARD VOLTAGE
With CONSULT-ll
1.
Connect stop lamp switch connector.
2.
Perform active test (STOP LAMP:STP LMP DRIVE ON) with
CONSULT-II, check voltage between ICC unit harness connec-
tor B244 terminal 29 (G) and ground.
OK or NG
NG
>> Replace stop lamp switch.Erase DTC and perform ICC
system running test. Then perform self-diagnosis of ICC
system again.
OK
>> Replace ICC unit. Erase DTC and perform ICC system
running test. Then perform self-diagnosis of ICC system
again.
DTC 92 ECM CIRCUIT
AKS002QW
1.
DIAGNOSIS CHECK 1
With CONSULT-II
●
Perform self-diagnosis with CONSULT-II. Is “CAN COMM CIRCUIT” indicated?
Yes or No
Yes
>> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
No
>> GO TO 2.
2.
DIAGNOSIS CHECK 2
With CONSULT-II
●
Perform ECM self-diagnosis with CONSULT-II. Is malfunction indicated?
Yes or No
Yes
>> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
No
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
DTC 97 AT CIRCUIT
AKS002QX
1.
CHECK AT CIRCUIT
With CONSULT-II
●
With TCM data monitor with CONSULT-II, check shift operates normally.
OK or NG
NG
>>
●
Perform TCM diagnosis.
●
After repair, Erase DTC, and perform self-diagnosis of ICC system again.
OK
>> Replace ICC unit. Erase DTC, and perform self-diagnosis of ICC system again.
DTC 98 GEAR POSITION
AKS002QY
1.
DIAGNOSTIC CHECK
With CONSULT-II
●
Is “DTC 43 ABS/TCS/VDC CIRC” or “DTC 41 VHCL SPEED SE CIRC” indicated in self-diagnosis display
item?
Yes or No
Yes
>> Repair or replace applicable item. Erase DTC, and perform self-diagnosis of ICC system again.
No
>> GO TO 2.
29 - Ground
Approx. 0V (during active test)
SKIA1200E
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