Infiniti FX35, FX50 (S51). Manual — part 545
C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DLN-15
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ETX13C]
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C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Description
INFOID:0000000005249041
Transmits the following signals via CAN communication to AWD control unit.
• Vehicle speed signal
• Stop lamp switch signal (brake signal)
DTC Logic
INFOID:0000000005249042
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
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 diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005249043
1.
PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-III
Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
1.
Erase results for “ALL MODE AWD/4WD”.
2.
Start the engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
3.
Make sure that ABS warning lamp turns OFF.
4.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1203” detected?
YES
>> Replace AWD control unit. Refer to
.
NO
>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace error-detected parts.
DTC
Display items
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
DLN-16
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ETX13C]
C1204 AWD SOLENOID
C1204 AWD SOLENOID
Description
INFOID:0000000005249044
Controls electric controlled coupling by command current from AWD control unit.
DTC Logic
INFOID:0000000005249045
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1204” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005249046
1.
CHECK AWD SOLENOID POWER SUPPLY
1.
Turn the ignition switch OFF.
2.
Disconnect AWD control unit harness connector.
3.
Check the voltage between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit. Refer to
2.
CHECK AWD CONTROL UNIT GROUND
Check the continuity between AWD control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK AWD SOLENOID CIRCUIT
1.
Disconnect AWD solenoid harness connector.
2.
Check the continuity between AWD control unit harness connector and AWD solenoid harness connector.
DTC
Display items
Malfunction detected condition
Possible cause
C1204
4WD SOLENOID
Malfunction related to AWD solenoid has
been detected.
Internal malfunction of electronic con-
trolled coupling
AWD control unit
—
Voltage
Connector
Terminal
M105
9
Ground
Battery voltage
AWD control unit
—
Continuity
Connector
Terminal
M105
10
Ground
Existed
11
C1204 AWD SOLENOID
DLN-17
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ETX13C]
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3.
Check the continuity between AWD control unit harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK AWD SOLENOID
Check the resistance between AWD solenoid harness connector terminals. Refer to
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
DLN-92, "VK50VE : Exploded View"
(VK50VE).
5.
CHECK TERMINALS AND HARNESS CONNECTORS
1.
Check AWD control unit pin terminals for damage or loose connection with harness connector.
2.
Check AWD solenoid pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Replace AWD control unit. Refer to
NO
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000005249047
1.
CHECK AWD SOLENOID
1.
Turn the ignition switch OFF.
2.
Disconnect AWD solenoid harness connector.
3.
Check the resistance between AWD solenoid connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> AWD solenoid is malfunctioning. Replace electric controlled coupling. Refer to
DLN-92, "VK50VE : Exploded View"
(VK50VE).
AWD control unit
AWD solenoid
Continuity
Connector
Terminal
Connector
Terminal
M105
1
F57
1
Existed
2
2
AWD control unit
—
Continuity
Connector
Terminal
M105
1
Ground
Not existed
2
AWD solenoid
Resistance (Approx.)
Terminal
1
2
2.45
Ω
DLN-18
< DTC/CIRCUIT DIAGNOSIS >
[TRANSFER: ETX13C]
C1205 AWD ACTUATOR RELAY
C1205 AWD ACTUATOR RELAY
Description
INFOID:0000000005249048
AWD solenoid is supplied with voltage by the internal circuit of AWD control unit.
DTC Logic
INFOID:0000000005249049
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1205” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005249050
1.
PERFORM SELF-DIAGNOSIS
With CONSULT-III
1.
Erase self-diagnostic results for “ALL MODE AWD/4WD”.
2.
Turn ignition switch OFF, and wait 10 seconds or more.
3.
Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1205” detected?
YES
>> Replace AWD control unit. Refer to
NO
>> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace error-detected parts.
DTC
Display item
Malfunction detected condition
Possible cause
C1205
4WD ACTUATOR RLY
Malfunction has been detected from
AWD actuator relay integrated with AWD
control unit, or malfunction related to
AWD solenoid has been detected.
Internal malfunction of AWD control unit
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