Infiniti Q45. Manual — part 15
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-53
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
DTC 62 BOOSTER SOL/V CIRCUIT
NKS001KN
1.
CHECK ICC UNIT AND BRAKE BOOSTER CONNECTORS
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and brake booster connector, and connect them securely again.
3.
Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
Is malfunction indicated?
YES
>> GO TO 2.
NO
>> Poor connector connection
1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.)
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
2.
CHECK HARNESS BETWEEN ICC UNIT AND BRAKE BOOSTER
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and brake booster connector.
3.
Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).
4.
Check continuity between ICC unit harness connector and
ground.
OK or NG
OK
>> GO TO 3.
NG
>> 1. Repair harness between ICC unit and brake booster.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
3.
CHECK BOOSTER SOLENOID
Check booster solenoid. Refer to
OK or NG
OK
>> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
NG
>> Booster solenoid malfunction
1. Replace brake booster.
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
10
E81
4
Yes
12
6
PKIC5179E
ICC unit
connector
Terminal
Ground
Continuity
B243
10
No
12
PKIB4148E
ACS-54
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
DTC 63 RELEASE SW CIRCUIT
NKS001KO
1.
CHECK ICC UNIT AND BRAKE BOOSTER CONNECTORS
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and brake booster connector, and connect them securely again.
3.
Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
Is malfunction indicated?
YES
>> GO TO 2.
NO
>> Poor connector connection
1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.)
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
2.
CHECK HARNESS BETWEEN ICC UNIT AND BRAKE BOOSTER
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and brake booster connector.
3.
Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).
4.
Check continuity between ICC unit harness connector and
ground.
OK or NG
OK
>> GO TO 3.
NG
>> 1. Repair harness between brake booster and ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
A
B
Continuity
ICC unit
connector
Terminal
Brake booster
connector
Terminal
B243
6
E81
1
Yes
15
3
22
2
ICC unit
connector
Terminal
Ground
Continuity
B243
6
No
15
22
PKIC5180E
PKIB1446E
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-55
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
3.
CHECK RELEASE SWITCH POWER SUPPLY CIRCUIT
1.
Connect ICC unit connector.
2.
Turn ignition switch ON.
3.
Check voltage between ICC unit harness connector and ground.
OK or NG
OK
>> GO TO 4.
NG
>> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
4.
CHECK RELEASE SWITCH
1.
Turn ignition switch OFF.
2.
Check release switch. Refer to
OK or NG
OK
>> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
NG
>> Release switch malfunction
1. Replace brake booster.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
DTC 65 PRESSURE CONTROL
NKS001KP
1.
OPERATION CHECK
Check foot brake pedal operates normally.
OK or NG
OK
>> GO TO 2.
NG
>> 1. Check brake circuit.
2. After repairing, erase DTC and perform “ACTIVE TEST” (BOOSTER SOL/V3) with CONSULT-
II. Then perform self-diagnosis of ICC system again.
2.
CHECK BOOSTER SOLENOID
Check booster solenoid. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Booster solenoid malfunction
1. Replace brake booster.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
Terminals
Voltage (Approx.)
(+)
(
−
)
ICC unit
connector
Terminal
B243
6
Ground
10 V
SKIA6656E
ACS-56
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
3.
CHECK HARNESS BETWEEN ICC UNIT AND BRAKE BOOSTER
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector and brake booster connector.
3.
Check continuity between ICC unit harness connector (A) and
brake booster harness connector (B).
4.
Check continuity between ICC unit harness connector and
ground.
OK or NG
OK
>> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NG
>> 1. Repair harness between brake booster and ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
DTC 74 LASER BEAM OFF CNTR
NKS001KQ
1.
ADJUST LASER BEAM AIMING
1.
Adjust laser beam aiming. Then erase DTC, and perform ICC system running test.
2.
Perform self-diagnosis of ICC system.
3.
Check if “DTC 74 LASER BEAM OFF CNTR” is indicated.
Is it indicated?
YES
>> 1. Replace ICC sensor, and adjust laser beam aiming.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
NO
>> INSPECTION END
DTC 90 STOP LAMP RLY FIX
NKS001KR
1.
CHECK CONNECTOR FOR ICC UNIT
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector, and connect it securely again.
3.
Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
Is malfunction indicated?
YES
>> GO TO 2.
NO
>> Poor connector connection
1. Check connector (Check connector housing for disconnected, loose, bent, and collapsed termi-
nals. If any malfunction is detected, repair applicable part).
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.
A
B
Continuity
ICC unit
connector
Terminal
Brake booster
connector
Terminal
B243
10
E81
4
Yes
12
6
ICC unit
connector
Terminal
Ground
Continuity
B243
10
No
12
PKIC5179E
PKIB4148E
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