Infiniti M35/M45 Y50. Manual — part 1120
TROUBLE DIAGNOSIS
STC-37
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
5.
CHECK RAS CONTROL UNIT OUTPUT SIGNAL
1.
Connect RAS control unit harness connector B476 and RAS
motor relay harness connector B480.
2.
Check voltage between RAS motor relay harness connector
B480 and ground.
OK or NG
OK
>> Check RAS motor relay separately from other parts.
Refer to
NG
>> RAS control unit malfunction (replacement)
Inspection 3: RAS Motor Output Malfunction
NGS000ES
1.
CHECK RAS CONTROL UNIT CONNECTOR
1.
Turn ignition switch OFF, disconnect RAS control unit harness connector and RAS motor harness connec-
tor, and check terminal for deformation, disconnection, looseness, etc.
2.
Reconnect harness connector securely, and perform self-diagnosis.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES
>> GO TO 2.
NO
>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
2.
CHECK RAS MOTOR RESISTANCE
1.
Turn ignition switch OFF, and disconnect RAS motor harness connector B463.
2.
Check the resistance RAS motor connector.
OK or NG
OK
>> GO TO 3.
NG
>> RAS motor malfunction. Replace RAS motor.
1 – Ground
Ignition switch ON
: Battery voltage (Approx. 12 V)
Ignition switch OFF
: Approx. 0V
SGIA1267E
Self-diagnosis results
MOTOR OUTPUT [ABNORMAL SIG] [C1913]
MOTOR OUTPUT [REV CURRENT] [C1902]
MOTOR OUTPUT [NO CURRENT] [C1903]
MOTOR OUTPUT [OVERCURRENT] [C1904]
MOTOR OUTPUT [MOTOR LOCK] [C1910]
DTC (warning lamp blinks)
13
Terminal 1 – 2
: Approx. 0.6
Ω
SGIA1268E
STC-38
[RAS]
TROUBLE DIAGNOSIS
3.
CHECK RAS MOTOR HARNESS
1.
Connect RAS motor harness connector B463.
2.
Disconnect RAS control unit harness connector B476.
3.
Check continuity RAS control unit harness connector B476.
OK or NG
OK
>> RAS control unit malfunction. Replace RAS control unit.
NG
>> Harness between RAS motor and RAS control unit open
or shorted. Repair or replace harness.
Inspection 4: Vehicle Speed Signal
NGS000ET
1.
CHECK SPEEDOMETER
Start the engine, and then check the combination meter (speedometer) operation.
Does it operate normally?
YES
>> GO TO 2.
NO
>> Combination meter. Refer to
2.
CHECK RAS CONTROL UNIT CONNECTOR
1.
Turn ignition switch OFF, disconnect RAS control unit harness connector, and check terminal for deforma-
tion, disconnection, looseness, etc.
2.
Reconnect harness connector securely, and perform self-diagnosis.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES
>> RAS control unit malfunction. Replace RAS control unit.
NO
>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Terminal 38 – 39
: Continuity should exist.
SGIA1269E
Self-diagnosis results
VEHICLE SPEED SEN [NO SIGNAL] [C1919]
DTC (warning lamp blinks)
21
TROUBLE DIAGNOSIS
STC-39
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
Inspection 5: Steering Angle Signal Malfunction
NGS000EU
1.
CHECK CONNECTOR
1.
Turn ignition switch OFF, disconnect RAS control unit harness connector and steering angle sensor har-
ness connector, and check terminal for deformation, disconnection, looseness, etc.
2.
Reconnect harness connector securely, and perform self-diagnosis.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES
>> GO TO 2.
NO
>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
2.
ADJUST NEUTRAL POSITION OF STEERING ANGLE SENSOR
Adjust the steering angle sensor neutral position, and then perform self-diagnosis again. Refer to
"Adjustment of Steering Angle Sensor Neutral Position"
.
Is the result of self-diagnosis normal?
OK
>> Inappropriate neutral position adjustment of steering angle sensor.
NG
>> GO TO 3.
3.
CHECK STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1.
Turn ignition switch OFF, and disconnect steering angle sensor harness connector M47.
2.
Check continuity steering angle sensor harness connector M47
and ground.
3.
Turn ignition switch ON, and then check voltage steering angle
sensor harness connector M47 and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Steering angle sensor power supply and ground circuit
open or shorted. Repair or replace the applicable mal-
functioning circuit.
Self-diagnosis results
STEERING ANGLE SEN [NO CHANGE] [C1923]
STEERING ANGLE SEN [NO NEUT STATE] [C1924]
STEERING ANGLE SEN [NO SIGNAL] [C1920]
STEERING ANGLE SEN [C1926]
DTC (warning lamp blinks)
22
Steering angle sensor
Ground
Continuity
Terminal 2
—
Yes
SGIA1270E
Steering angle sensor
Ground
Continuity
Terminal 3
—
Battery voltage
(approx. 12V)
SGIA1271E
STC-40
[RAS]
TROUBLE DIAGNOSIS
4.
DATA MONITOR
1.
Connect steering angle sensor harness connector.
2.
Select “DATA MONITOR” on “STEERING ANG” mode, and then check the steering angle.
OK or NG
OK
>> RAS control unit malfunction. Replace RAS control unit.
NG
>> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to
6, "Adjustment of Steering Angle Sensor Neutral Position"
Inspection 6: Rear Main Signal and Rear Sub Signal Malfunction
NGS000EV
1.
CHECK RAS CONTROL UNIT CONNECTOR
1.
Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle
sensor harness connector, and check terminal for deformation, disconnection, looseness, etc.
2.
Reconnect harness connector securely, and perform self-diagnosis.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES
>> GO TO 2.
NO
>> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Steering condition
DATA MONITOR
Straight-ahead position
– 3.5 - +3.5
°
Turn wheel to the right by 90
°
Approx. R 90
°
Turn wheel to the left by 90
°
Approx. R 90
°
Self-diagnosis results
RR ST ANGLE SENSOR [MAIN SIGNAL] [C1915]
RR ST ANGLE SENSOR [SUB SIGNAL] [C1916]
RR ST ANGLE SENSOR [OFFSET SIG1] [C1917]
RR ST ANGLE SENSOR [OFFSET SIG2] [C1918]
RR ST ANGLE SENSOR [ABNORMAL VOL] [C1914]
DTC (warning lamp blinks)
24
25
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