Nissan Titan. Instruction — part 33
C1178, C1181, C1184, C1189 ABS ACTIVE BOOSTER
BRC-73
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to
BRC-8, "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-9, "CALIBRATION OF DECEL G SENSOR : Description"
>> END
BRC-74
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1179 ABS DELTA S SEN NG
C1179 ABS DELTA S SEN NG
Description
INFOID:0000000009883694
The active brake booster consists of a vacuum booster, an active booster control group and a delta stroke
sensor. If a brake booster system malfunction occurs due to loss of vacuum, the delta stroke sensor will signal
the ABS actuator and electric unit (control unit) that a booster malfunction has occurred. The active booster
then applies supplemental force to the master cylinder relative to the amount of force exerted on the brake
pedal.
DTC Logic
INFOID:0000000009883695
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:0000000009883696
Regarding Wiring Diagram information, refer to
1.
CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the delta stroke sensor and ABS actuator and electric unit (control unit) connectors.
3. Inspect the terminals for deformation, disconnection, looseness, or damage.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> Repair connector.
2.
DELTA STROKE SENSOR CIRCUIT INSPECTION
1. Measure the continuity between ABS actuator and electric unit (control unit) connector E125 (A) and delta
stroke sensor connector E114 (B).
DTC
Display item
Malfunction detected condition
Possible cause
C1179
ABS DELTA S SEN NG
Delta stroke sensor is malfunctioning, or signal line of
delta stroke sensor is open or shorted.
• Harness or connector
• Delta stroke sensor
• ABS actuator and electric unit
(control unit)
Self-diagnosis results
ABS DELTA S SEN NG
ABS actuator and electric unit
(control unit)
Delta stroke sensor
Continuity
Connector
Terminal
Connector
Terminal
A: E125
26
B: E114
1
Yes
39
3
40
5
C1179 ABS DELTA S SEN NG
BRC-75
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
N
O
P
2. Measure the continuity between ABS actuator and electric unit (control unit) connector E125 (A) and body
ground.
Is the inspection result normal?
YES
>> GO TO 3
NO
>> Repair or replace harness or connector.
3.
DELTA STROKE SENSOR INSPECTION
1. Reconnect the delta stroke sensor and ABS actuator and electric unit (control unit) connectors.
2. Perform the delta stroke sensor component inspection. Refer to
BRC-75, "Component Inspection"
Is the inspection result normal?
YES
>> Replace the ABS actuator and electric unit (control unit). Refer to
.
NO
>> Replace the delta stroke sensor.
Component Inspection
INFOID:0000000009883697
1.
CHECK DATA MONITOR
Use “DATA MONITOR” to check if the status of “DELTA S SEN” is normal.
Is the inspection result normal?
YES
>> Inspection End
NO
>> Go to diagnosis procedure. Refer to
Special Repair Requirement
INFOID:0000000009883698
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-8, "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-9, "CALIBRATION OF DECEL G SENSOR : Description"
>> END
ABS actuator and electric unit (control
unit)
—
Continuity
Connector
Terminal
A: E125
26
Ground
No
39
40
Condition
DELTA S SEN
(DATA MONITOR)
When brake pedal is depressed.
1.05–1.80 mm
When brake pedal is released.
0.00 mm (+0.6/-0.4)
BRC-76
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1187 DIFFERENTIAL LOCK CONTROL UNIT
C1187 DIFFERENTIAL LOCK CONTROL UNIT
Description
INFOID:0000000009883699
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:0000000009883700
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:0000000009883701
1.
CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
4. Reconnect connector and perform self-diagnosis. Refer to
BRC-24, "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
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