Infiniti G35 (V35) Sedan. Manual — part 1312
STC-138
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
POWER STEERING SOLENOID VALVE
POWER STEERING SOLENOID VALVE
Description
INFOID:0000000000958910
• The power steering oil pressure in the gear housing assembly is controlled.
Diagnosis Procedure
INFOID:0000000000958911
1.
CHECK POWER STEERING SOLENOID VALVE SIGNAL
With CONSULT-III
1.
Start the engine.
2.
Check “POWER STR SOL” item on “DATA MONITOR” of 4WAS main control unit.
Without CONSULT-III
1.
Start the engine.
2.
Check the voltage between 4WAS main control unit harness connector and the ground.
3.
Check that there is no malfunction in 4WAS main control unit harness connector or disconnection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace 4WAS main control unit. Refer to
2.
CHECK POWER STEERING SOLENOID VALVE CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect 4WAS main control unit harness connector.
3.
Disconnect the power steering solenoid valve harness connector.
4.
Check the continuity between 4WAS main control unit harness connector and power steering solenoid
valve harness connector.
5.
Check the continuity between power steering solenoid valve harness connector and the ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the harnesses and connectors.
Monitor item
Condition
Display value
POWER STR SOL
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
Approx. 1.10 A
Vehicle speed: 100 km/h (62 MPH)
Approx. 0.42 A
4WAS main control unit
Data (Approx.)
Connector
Terminal
Condition
B54
36 – Ground
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
4.4 – 6.6 V
Vehicle speed: 100 km/h (62
MPH)
2.4 – 3.6 V
4WAS main control unit
Power steering solenoid
valve
Continuity
Connector
Terminal
Connector
Terminal
M54
36
F45
1
Existed
Power steering solenoid valve
Continuity
Connector
Terminal
F45
2 – Ground
Existed
POWER STEERING SOLENOID VALVE
STC-139
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
3.
CHECK POWER STEERING SOLENOID VALVE
1.
Check the resistance between power steering solenoid valve connector.
2.
Check for click (power steering solenoid valve activation sound) when applying approximately 12 V
between the power steering solenoid valve connector.
CAUTION:
• Never make the terminals short.
• Assign the positive terminal to No. 1 terminal, and the negative terminal to No. 2 terminal. Con-
nect the fuse between the terminals when applying the voltage.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair the steering gear. Refer to
Component Inspection
INFOID:0000000000958912
1.
POWER STEERING SOLENOID VALVE INSPECTION
1.
Turn the ignition switch OFF.
2.
Disconnect the power steering solenoid valve harness connector.
3.
Check the resistance between power steering solenoid valve connector.
4.
Check for click (power steering solenoid valve activation sound) when applying approximately 12 V
between the power steering solenoid valve connector.
CAUTION:
• Never make the terminals short.
• Assign the positive terminal to No. 1 terminal, and the negative terminal to No. 2 terminal. Con-
nect the fuse between the terminals when applying the voltage.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair the steering gear.
.
Power steering solenoid valve
Resistance (Approx.)
Connector
Terminal
F45
1 – 2
4 – 6
Ω
Power steering solenoid valve
Resistance (Approx.)
Connector
Terminal
F45
1 – 2
4 – 6
Ω
STC-140
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
4WAS WARNING LAMP
4WAS WARNING LAMP
Description
INFOID:0000000000958913
• Turn 4WAS warning lamp ON when ignition switch turns ON from OFF. Then, turn 4WAS warning lamp OFF
after the engine is started.
• The check of 4WAS system is performed.
• 4WAS system stops (error) when turning 4WAS warning lamp ON.
Diagnosis Procedure
INFOID:0000000000958914
1.
PERFORM UNIFIED METER AND A/C AMP. SELF-DIAGNOSIS
With CONSULT-III
Perform the self-diagnosis of the unified meter and A/C amp.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is DTC “U1000” or “U1010” detected?
YES
>> Check the error system.
NO
>> GO TO 3.
3.
PERFORM COMBINATION METER CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect the unified meter and A/C amp. harness connector.
3.
Disconnect the combination meter harness connector.
4.
Check the continuity between the unified meter and A/C amp. harness connector and the combination
meter harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the harnesses and connectors.
4.
CHECK 4WAS WARNING LAMP SIGNAL
With CONSULT-III
1.
Connect the unified meter and A/C amp. harness connector.
2.
Connect the combination meter harness connector.
3.
Disconnect 4WAS front control unit harness connector.
4.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
5.
Check “WARNING LAMP” item on DATA MONITOR of 4WAS main control unit.
Does the item on “DATA MONITOR” indicate “On”?
YES
>> GO TO 5.
NO
>> Replace 4WAS main control unit. Refer to
5.
CHECK COMBINATION METER
With CONSULT-III
Unified meter and A/C amp.
Combination meter
Continuity
Connector
Terminal
Connector
Terminal
M66
7
M53
3
Existed
M66
27
M53
2
4WAS WARNING LAMP
STC-141
< COMPONENT DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
Perform the trouble diagnosis of the combination meter. Refer to
MWI-49, "COMBINATION METER : Diagno-
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the combination meter. Refer to
Special Repair Requirement
INFOID:0000000000958915
BEFORE REPLACING 4WAS MAIN CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Replace it without erasing the memory (history) of self-diagnosis results when replacing 4WAS
main control unit after diagnosis.
• Erase the memory of the self-diagnosis results (record) after printing out or recording all the val-
ues of “DATA MONITOR” when erasing the memory of the self-diagnosis results (record).
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