Infiniti Q45. Manual — part 20
TROUBLE DIAGNOSIS FOR SYMPTOMS
ACS-73
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
4.
CHECK ICC WARNING CHIME SIGNAL
With CONSULT-II
1.
Select “ICC BUZZER 1” on “ACTIVE TEST” with CONSULT-II.
2.
Check voltage signal between ICC warning chime harness connector and ground.
–
With LDW models
–
Without LDW models
OK or NG
OK
>> 1. Replace ICC warning chime.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
NG
−
1 >> In the case of 12 V: GO TO 5.
NG
−
2 >> In the case of 0 V:
1. Replace ICC warning chime.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
Terminals
Voltage (Approx.)
(+)
(-)
ICC warning chime
connector
Terminal
M22
3
Ground
PKIC4921E
PKIA9674E
Terminals
Voltage (Approx.)
(+)
(-)
ICC warning chime
connector
Terminal
M37
2
Ground
PKIA9824E
PKIA9674E
ACS-74
[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
5.
CHECK HARNESS BETWEEN ICC UNIT AND ICC WARNING CHIME
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and ICC warning chime connector.
3.
Check continuity between ICC unit harness connector (A) and ICC warning chime harness connector (B).
–
With LDW models
–
Without LDW models
OK or NG
OK
−
1 >> With LDW models: GO TO 6
OK
−
2 >> Without LDW models
1. Replace ICC warning chime.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NG
>> 1. Repair harness between ICC unit and ICC warning chime.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
6.
CHECK ICC WARNING CHIME GROUND CIRCUIT
Check continuity between ICC warning chime harness connector
and ground.
OK or NG
OK
>> 1. Replace ICC warning chime.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NG
>> 1. Repair harness between ICC warning chime and
ground.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
A
B
Continuity
Connector
Terminal
Connector
Terminal
B243
21
M22
3
Yes
PKIC4923E
A
B
Continuity
Connector
Terminal
Connector
Terminal
B243
21
M37
2
Yes
PKIC6047E
ICC warning
chime connector
Terminal
Ground
Continuity
M22
8
No
PKIC4922E
TROUBLE DIAGNOSIS FOR SYMPTOMS
ACS-75
[ICC]
C
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ACS
Symptom 6: Chime Does Not Stop
NKS001L7
1.
CHECK ICC WARNING CHIME CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector.
3.
Turn ignition switch ON.
Does chime sound?
YES
>> GO TO 2.
NO
>> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
2.
CHECK HARNESS BETWEEN ICC UNIT AND ICC WARNING CHIME
1.
Turn ignition switch OFF.
2.
Disconnect ICC warning chime connector.
3.
Check continuity between ICC unit harness connector and
ground.
OK or NG
OK
>> 1. Replace ICC warning chime.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NG
>> 1. Repair harness between ICC unit and ICC warning chime.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
Symptom 7: Driving Force Is Hunting
NKS001L8
1.
PERFORM ECM SELF-DIAGNOSIS
Perform ECM self-diagnosis.
OK or NG
OK
ACS-75, "Symptom 8: ICC System Frequently Cannot Detect the Vehicle Ahead/ Detec-
NG
>> After repairing applicable parts, erase DTC. Perform ICC system running test, and then perform
self-diagnosis of ICC system again.
Symptom 8: ICC System Frequently Cannot Detect the Vehicle Ahead/ Detection
Zone Is Short
NKS001L9
The detection function may become unstable in the following cases
●
When the reflector of the vehicle ahead is deficient/ not clean enough to reflect the radar.
●
When driving a road with extremely sharp corners.
●
When the radar cannot detect the reflector of the vehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
1.
VISUAL CHECK
Check ICC sensor body window for contamination and foreign materials.
Is it found?
YES
>> If any contamination or foreign materials are found, remove them. Then perform ICC system run-
ning test.
NO
>> GO TO 2.
ICC unit connector
Terminal
Ground
Continuity
B243
21
No
PKIC6048E
ACS-76
[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
2.
ADJUST LASER BEAM AIMING
1.
Adjust laser beam aiming.
2.
Perform ICC system running test. Check if preceding vehicle detection performance has been improved.
Is it improved?
YES
>> INSPECTION END
NO
>> 1. Replace ICC sensor, and perform laser beam aiming adjustment.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
ACS-11, "ICC System Running Test"
Symptom 9: The System Does Not Detect the Vehicle Ahead at All
NKS001LA
1.
VISUAL CHECK 1
With ignition switch turned ON (engine not started), check if all indicator lamps in ICC system display are con-
tinuously lit. (Check for a missing segment in preceding vehicle detection display.)
OK or NG
OK
>> GO TO 2.
NG
>> Check for combination meter. Refer to
DI-22, "ICC System Display Does Not Illuminate"
2.
VISUAL CHECK 2
Check ICC sensor body window for contamination and foreign materials.
Is it found?
OK
>> If any contamination or foreign materials are found, remove them. Perform ICC system running
test.
NG
>> GO TO 3.
3.
VISUAL CHECK 3
Check ICC sensor body window for cracks and scratches.
Is it found?
YES
>> 1. Replace ICC sensor, and perform laser beam aiming adjustment.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
NO
>> GO TO 4.
4.
ADJUST LASER BEAM AIMING
1.
Adjust laser beam aiming.
2.
Perform ICC system running test. Check if preceding vehicle detection performance has been improved.
Is it improved?
YES
>> INSPECTION END
NO
>> 1. Replace ICC sensor, and perform laser beam aiming adjustment.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
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