Infiniti G37 Coupe. Manual — part 1272
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 terminals.
2.
Check for click sound (power steering solenoid valve activation sound) when applying approximately 12 V
between the power steering solenoid valve connector terminals.
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:0000000001666474
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 terminals.
4.
Check for click sound (power steering solenoid valve activation sound) when applying approximately 12 V
between the power steering solenoid valve connector terminals.
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:0000000001666475
• 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:0000000001666476
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-50, "COMBINATION METER : Diagno-
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the combination meter. Refer to
Special Repair Requirement
INFOID:0000000001666477
BEFORE REPLACING 4WAS MAIN CONTROL UNIT
• Record the self-diagnosis results (history).
CAUTION:
• Never erase 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”.
STC-142
< ECU DIAGNOSIS >
[WITH 4WAS]
4WAS FRONT CONTROL UNIT
ECU DIAGNOSIS
4WAS FRONT CONTROL UNIT
Reference Value
INFOID:0000000001666478
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
Monitor item
Condition
Value/Status
4WAS STR ANG
Steering wheel turned right
Approx. 0 – 550 deg
Straight-ahead
Approx. 0 deg
Steering wheel turned left
Approx. 0 –
−
550 deg
VEHICLE SPEED
Vehicle stopped
0 km/h (0 MPH)
Vehicle running
CAUTION:
Check air pressure of tire under standard conditions.
Approximately equal to the indi-
cation on speedometer (Inside
of
±
10%)
MOTOR CURRENT
The steering wheel is not steered.
Approx. 0 – 1 A
The steering wheel is steering.
Approx. 0 – 60 A
MTR CRNT ESTM
The steering wheel is not steered.
Approx. 0 – 1 A
The steering wheel is steering.
Approx. 0 – 60 A
ACTR ROTA ANG
Steering wheel turned to the right (with vehicle stopped).
Approx. 0 – 60 deg
Straight-ahead
Approx. 0 deg
Steering wheel turned to the left (with vehicle stopped).
Approx. 0 –
−
60 deg
LG VOLT
Ignition switch: ON
Engine running (idling)
Approx. 0 – 16 V
THERM TEMP
Engine running (idling)
−
40 – 100
°
C
MOTOR VOLT
Ignition switch: ON
Engine running (idling)
Battery voltage
Engine stopped.
Battery voltage
IGN VOLT
Ignition switch: ON
Engine running (idling)
Battery voltage
Engine stopped.
Battery voltage
ACTR ANG COMM
Steering wheel turned to the right (with vehicle stopped).
Approx. 0 – 60 deg
Straight-ahead
Approx. 0 deg
Steering wheel turned to the left (with vehicle stopped).
Approx. 0 –
−
60 deg
ACTR ROTA SPD
The steering wheel is not steered.
0 deg/s
The steering wheel is steering.
Other than 0 deg/s
DUTY COMMAND
Ignition switch: ON
Engine running (idling)
0 – 100%
LOCK DTY COMM
Ignition switch: ON
Engine running (idling)
0 – 100%
MTR U VOLT
Ignition switch: ON
Engine running (idling)
Approx. 0 – 20 V
Engine stopped.
0 V
MTR V VOLT
Ignition switch: ON
Engine running (idling)
Approx. 0 – 20 V
Engine stopped.
0 V
MTR W VOLT
Ignition switch: ON
Engine running (idling)
Approx. 0 – 20 V
Engine stopped.
0 V
ACT TEMP ESTM
Engine running (idling)
−
40 – 100
°
C
MTR PHZ CRNT
The steering wheel is steering.
Approx. 0 – 20 A
ACTR DEVI ANG
The steering wheel is steering.
Approx.
−
10 – 10 deg
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