Infiniti QX56 (Z62). Manual — part 150
C1116 STOP LAMP SWITCH
BRC-85
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
NO
>> Repair or replace error-detected parts.
20.
CHECK STOP LAMP RELAY POWER SUPPLY (4)
1.
Check voltage between stop lamp relay harness connector and ground.
2.
Turn the ignition switch ON.
CAUTION:
Never start engine.
3.
Check voltage between stop lamp relay harness connector and ground.
Is the inspection result normal?
YES
>> Check pin terminals and connection of stop lamp relay harness connector for abnormal condi-
tions. Repair or replace error-detected parts.
NO
>> GO TO 21.
21.
CHECK STOP LAMP RELAY CIRCUIT (4)
1.
Check 10A fuse (#7).
2.
Disconnect fuse block (J/B) harness connector.
3.
Check fuse block (J/B) pin terminals for damage or loose connection with harness connector.
4.
Check continuity between stop lamp relay harness connector and fuse block (J/B).
Is the inspection result normal?
YES
>> Perform trouble diagnosis for battery power supply. Refer to
PG-11, "Wiring Diagram - BATTERY
NO
>> Repair or replace error-detected parts.
22.
CHECK TERMINAL
Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness
connector.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-137, "Removal and Installa-
.
NO
>> Repair or replace error-detected parts.
Component Inspection (Stop lamp Switch)
INFOID:0000000006222605
1.
CHECK STOP LAMP SWITCH
1.
Turn the ignition switch OFF.
2.
Disconnect stop lamp switch harness connector.
3.
Check continuity when stop lamp switch is operated.
Stop lamp relay
—
Voltage
Connector
Terminal
E58
3
Ground
Battery voltage
Stop lamp relay
—
Voltage
Connector
Terminal
E58
3
Ground
Battery voltage
Stop lamp relay
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
E58
3
E103
8F
Existed
BRC-86
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1116 STOP LAMP SWITCH
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
BR-20, "Removal and Installation"
.
Component Inspection (Stop Lamp Relay)
INFOID:0000000006222606
1.
CHECK STOP LAMP RELAY
1.
Apply 12 V to stop lamp relay connector terminal (1 and 2).
CAUTION:
• Never make the terminals short.
• Connect the fuse between the terminals when applying the voltage.
2.
Check continuity between stop lamp relay connector terminals.
3.
Check resistance between stop lamp relay connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp relay.
Stop lamp switch
Condition
Continuity
Terminal
1
−
2
3
−
4
When stop lamp switch is released
(When brake pedal is depressed)
Existed
When stop lamp switch is pressed
(When brake pedal is released)
Not existed
Stop lamp relay
Condition
Continuity
Terminal
3
−
5
Apply 12 V to stop lamp relay connector
terminal (1 and 2)
Existed
Do not apply 12 V to stop lamp relay con-
nector terminal (1 and 2)
Not existed
Stop lamp relay
Resistance
Terminal
1
−
2
Approx. 50
Ω
C1118 TRANSFER CONTROL UNIT
BRC-87
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
C1118 TRANSFER CONTROL UNIT
DTC Logic
INFOID:0000000006222607
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ABS”.
Is DTC “C1118” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006222608
1.
CHECK TRANSFER CONTROL UNIT SYSTEM
With CONSULT-III.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
With CONSULT-III.
1.
Erase Self-diagnosis result for “ABS”.
2.
Turn the ignition switch OFF.
3.
Start the engine and drive the vehicle for a short period of time.
4.
Check that the 4WD warning lamp turns OFF.
5.
After the vehicle stops, perform self-diagnosis for “ABS”.
Is DTC “C1118” detected?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-137, "Removal and Installa-
.
NO
>> Check pin terminals and connection of each harness connector for abnormal conditions. Repair or
replace error-detected parts.
DTC
Display Item
Malfunction detected condition
Possible causes
C1118
4WD SYSTEM
When a malfunction is detected in transfer control unit
system.
• Transfer control unit
• ABS actuator and electric unit
(control unit)
• CAN communication line
BRC-88
< DTC/CIRCUIT DIAGNOSIS >
[WITH VDC]
C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM
C1120, C1122, C1124, C1126 ABS IN VALVE SYSTEM
DTC Logic
INFOID:0000000006222609
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ABS”.
Is DTC “C1120”, “C1122”, “C1124” or “C1126” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006222610
1.
CHECK ABS IN VALVE POWER SUPPLY
1.
Turn the ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) harness connector.
3.
Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
4.
Turn the ignition switch ON.
CAUTION:
Never start engine.
5.
Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ABS IN VALVE POWER SUPPLY CIRCUIT
1.
Turn the ignition switch OFF.
2.
Check 30A fusible link (L).
3.
Check continuity and short circuit between ABS actuator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
DTC
Display Item
Malfunction detected condition
Possible causes
C1120
FR LH IN ABS SOL
When a malfunction is detected in front LH ABS IN
valve.
• Harness or connector
• ABS actuator and electric unit
(control unit)
• Fusible link
• Battery power supply system
C1122
FR RH IN ABS SOL
When a malfunction is detected in front RH ABS IN
valve.
C1124
RR LH IN ABS SOL
When a malfunction is detected in rear LH ABS IN
valve.
C1126
RR RH IN ABS SOL
When a malfunction is detected in rear RH ABS IN
valve.
ABS actuator and electric unit (control unit)
—
Voltage
Connector
Terminal
E36
1
Ground
Battery voltage
ABS actuator and electric unit (control unit)
—
Voltage
Connector
Terminal
E36
1
Ground
Battery voltage
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