Nissan Frontier. Manual — part 137
BRC-76
< DTC/CIRCUIT DIAGNOSIS >
[TYPE 1]
C1187 DIFFERENTIAL LOCK CONTROL UNIT
C1187 DIFFERENTIAL LOCK CONTROL UNIT
Description
INFOID:0000000009479332
The differential lock control unit is connected to the ABS actuator and electric unit (control unit) via CAN lines.
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.
DTC Logic
INFOID:0000000009479333
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> Inspection End
Diagnosis Procedure
INFOID:0000000009479334
1.
CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair
or replace terminals.
4. Reconnect connector and perform self-diagnosis. Refer to
BRC-29, "CONSULT Function (ABS)"
.
Is above displayed on the self-diagnosis display?
YES
>> Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
NO
>> Inspection End
DTC
Display item
Malfunction detected condition
Possible cause
C1187
ABS DIFLOCK CONTROL-
LER NG
Differential lock controller malfunction.
• Harness or connector
• CAN communication line
• Differential lock control unit
• ABS actuator and electric unit
(control unit)
Self-diagnosis results
ABS DIFLOCK CONTROLLER NG
Self-diagnosis results
ABS DIFLOCK CONTROLLER NG
U1000 CAN COMM CIRCUIT
BRC-77
< DTC/CIRCUIT DIAGNOSIS >
[TYPE 1]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009479335
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.
DTC Logic
INFOID:0000000009479336
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009479337
1.
CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect the ABS actuator and electric unit (control unit) connector.
3. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair
or replace terminals.
4. Reconnect connector and perform self-diagnosis. Refer to
BRC-29, "CONSULT Function (ABS)"
Is “CAN COMM CIRCUIT” displayed in self-diagnosis display items?
YES
>> Print out the self-diagnostic results, and refer to
LAN-14, "Trouble Diagnosis Flow Chart"
NO
>> Connector terminal is loose, damaged, open, or shorted.
DTC
Display item
Malfunction detected condition
Possible cause
U1000
CAN COMM CIRCUIT
When ABS actuator and electric unit (control unit) is not
transmitting or receiving CAN communication signal for 2
seconds or more.
• CAN communication line
• ABS actuator and electric unit
(control unit)
BRC-78
< DTC/CIRCUIT DIAGNOSIS >
[TYPE 1]
VDC OFF SWITCH
VDC OFF SWITCH
Description
INFOID:0000000009479338
VDC OFF switch can deactivate (turn OFF) the VDC/TCS function by pressing the VDC OFF switch.
Component Function Check
INFOID:0000000009479339
1.
CHECK VDC OFF SWITCH OPERATION
Press and release the VDC OFF switch, then press and release the VDC OFF switch again and check that the
VDC OFF indicator lamp in the combination meter turns ON/OFF correctly.
Is the inspection result normal?
YES
>> Inspection End
NO
>> Go to diagnosis procedure. Refer to
Diagnosis Procedure
INFOID:0000000009479340
Regarding Wiring Diagram information, refer to
BRC-92, "Wiring Diagram - VDC WITHOUT HILL DESCENT
1.
CHECK VDC OFF SWITCH
Perform the VDC OFF switch component inspection. Refer to
BRC-79, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Replace VDC OFF switch.
2.
CHECK VDC OFF SWITCH HARNESS
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check continuity between ABS actuator and electric unit (control unit) connector E127 (A) terminal 6 and
VDC OFF switch connector M154 (B) terminal 1.
3. Check continuity between ABS actuator and electric unit (control unit) connector E127 (A) terminal 6 and
ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness.
3.
CHECK VDC OFF SWITCH GROUND
Condition
VDC OFF indicator lamp illumination status
VDC OFF switch: pressed and released
ON
VDC OFF switch: pressed and released
OFF
ABS actuator and electric unit
(control unit)
VDC OFF switch
Continuity
Connector
Terminal
Connector
Terminal
E127 (A)
6
M154 (B)
1
Yes
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E127 (A)
6
Ground
No
VDC OFF SWITCH
BRC-79
< DTC/CIRCUIT DIAGNOSIS >
[TYPE 1]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Check continuity between VDC OFF switch connector M154 and
ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
4.
CHECK COMBINATION METER
Check if the indication and operation of combination meter are normal. Refer to
.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-115, "Removal and Installa-
.
NO
>> Replace combination meter. Refer to
MWI-90, "Removal and Installation"
Component Inspection
INFOID:0000000009479341
1.
CHECK VDC OFF SWITCH
1. Turn ignition switch OFF.
2. Disconnect VDC OFF switch connector.
3. Check continuity between VDC OFF switch terminals.
Is the inspection result normal?
YES
>> Inspection End
NO
>> Replace VDC OFF switch.
Special Repair Requirement
INFOID:0000000009479342
1.
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to
BRC-12, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
.
>> GO TO 2
2.
CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
BRC-13, "CALIBRATION OF DECEL G SENSOR : Description"
.
>> END
VDC OFF switch
—
Continuity
Connector
Terminal
M154
2
Ground
Yes
AWFIA0031ZZ
VDC OFF switch terminals
Condition
Continuity
1
− 2
VDC OFF switch pressed.
Yes
VDC OFF switch released.
No
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