Nissan Pathfinder. Manual — part 401
DLN-46
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DTC Logic
INFOID:0000000009177733
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION
With CONSULT
1. Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1 minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1203” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009177734
1.
PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES
>> Check the DTC. Refer to
.
NO
>> GO TO 2.
2.
CHECK TERMINALS AND HARNESS CONNECTORS
Check 4WD control unit pin terminals for damage or loose connection with harness connector.
Is inspection result normal?
YES
>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1203”
is detected, Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
DTC
Display item
Malfunction detected condition
Possible cause
C1203
ABS SYSTEM
Malfunction related to wheel sensor has
been detected by ABS actuator and
electric unit (control unit).
ABS malfunction
• Vehicle speed signal error
C1204 4WD SOLENOID
DLN-47
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C
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A
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DLN
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C1204 4WD SOLENOID
DTC Logic
INFOID:0000000009177735
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1204” detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009177736
1.
CHECK 4WD SOLENOID POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect 4WD control unit harness connector.
3. Check the voltage between 4WD control unit harness connector and ground.
4. Turn the ignition switch ON.
CAUTION:
Never start the engine.
5. Check the voltage between 4WD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK 4WD SOLENOID POWER SUPPLY (2)
1. Turn the ignition switch OFF.
2. Check the 10A fuse (#62)
DTC
Display item
Malfunction detected condition
Possible cause
C1204
4WD SOLENOID
Malfunction related to 4WD solenoid has
been detected.
• Internal malfunction of electronic con-
trolled coupling
• Malfunction of 4WD solenoid power
supply circuit (open or short)
• Malfunction of 4WD solenoid com-
mand current
4WD control unit
—
Voltage
Connector
Terminal
B67
9
Ground
Battery voltage
4WD control unit
—
Voltage
Connector
Terminal
B67
9
Ground
Battery voltage
DLN-48
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C1204 4WD SOLENOID
3. Check the harness for open or short between 4WD control unit harness connector No.9 terminal and 10A
fuse (#62).
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit. Refer to
NO
>> Repair or replace error-detected parts.
3.
CHECK 4WD SOLENOID GROUND
Check the continuity between 4WD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK 4WD SOLENOID CIRCUIT (1)
Check the resistance between 4WD control unit harness connector.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 5.
5.
CHECK 4WD SOLENOID CIRCUIT (2)
1. Remove 4WD solenoid harness connector.
2. Check the continuity between 4WD control unit harness connector and 4WD solenoid harness connector.
3. Check the continuity between 4WD control unit harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK 4WD SOLENOID
Check 4WD solenoid. Refer to
DLN-49, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
.
4WD control unit
—
Continuity
Connector
Terminal
B67
10
Ground
Existed
11
4WD control unit
Resistance (Approx.)
Connector
Terminal
B67
1
2
2.45
Ω
4WD control unit
4WD solenoid
Continuity
Connector
Terminal
Connector
Terminal
B67
1
C12
1
Existed
2
2
4WD control unit
—
Continuity
Connector
Terminal
B67
1
Ground
Not existed
2
C1204 4WD SOLENOID
DLN-49
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: TY21C]
C
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DLN
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7.
CHECK TERMINALS AND HARNESS CONNECTORS
• Check 4WD control unit pin terminals for damage or loose connection with harness connector.
• Check 4WD solenoid pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace 4WD control unit. Refer to
DLN-72, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000009177737
1.
CHECK 4WD SOLENOID
1. Turn the ignition switch OFF.
2. Disconnect 4WD solenoid harness connector.
3. Check the resistance between 4WD solenoid harness connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
.
4WD solenoid
Resistance (Approx.)
Terminal
1
2
2.45
Ω
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