ras INFINITI M35 2007 Factory Service Manual

TROUBLE DIAGNOSIS
STC-37
[RAS]
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Revision: 2007 April2007 M35/M45
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 STC-50, "
RAS MOTOR RELAY" .
NG >> RAS control unit malfunction (replacement)
Inspection 3: RAS Motor Output MalfunctionNGS000ES
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
Revision: 2007 April2007 M35/M45
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 SignalNGS000ET
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 DI-5, "
COMBINATION METERS" .
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]
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Revision: 2007 April2007 M35/M45
Inspection 5: Steering Angle Signal MalfunctionNGS000EU
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 BRC-6,
"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
Revision: 2007 April2007 M35/M45
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 BRC-
6, "Adjustment of Steering Angle Sensor Neutral Position" .
Inspection 6: Rear Main Signal and Rear Sub Signal MalfunctionNGS000EV
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

TROUBLE DIAGNOSIS
STC-41
[RAS]
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Revision: 2007 April2007 M35/M45
2. CHECK (1): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, and disconnect rear wheel steering angle sensor harness connector B465.
2. Check continuity rear wheel steering angle sensor harness con-
nector B465 and ground.
3. Turn ignition switch ON, and then check voltage rear wheel
steering angle sensor harness connector B465 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK (2): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.
2. Check continuity each harness connector of rear wheel steering
angle sensor harness connector B465 (A) and RAS control unit
harness connector B476 (B).
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> Harness between rear wheel steering angle sensor and
RAS control unit open or shorted. Repair or replace har-
ness. Terminal 3 − Ground : Continuity should exist.
SGIA1272E
Terminal 1 − Ground : Approx. 5 V
SGIA1273E
Rear wheel steering angle sensor RAS control unit Continuity
Terminal 1 Terminal 5 Yes
Terminal 3 Terminal 15 Yes
SGIA1650E

STC-42
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
4. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL
1. Connect rear wheel steering angle sensor harness connector B465.
2. Check voltage RAS control unit harness connector B476 when
starting the engine and turning the steering wheel from neutral
position clockwise/counterclockwise by 180°.
CAUTION:
There is approximately 1 V or more difference between main output and sub output at straight-ahead position, inspection
results are “NG”.
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> GO TO 5.
5. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.
2. Check continuity between each harness connector of rear wheel
steering angle sensor harness connector B465 (A) and RAS
control unit harness connector B476 (B).
OK or NG
OK >> Rear wheel steering angle sensor malfunction. Replace
rear wheel steering angle sensor.
NG >> Harness between rear wheel steering angle sensor and
RAS control unit open or shorted. Repair or replace harness.
SGIA1275E
Steering conditionRear wheel steering angle sensor
Rear main output
Terminal 4 (+) - 15 (-)Rear sub output
Terminal 7 (+) - 15 (-)
Straight-ahead (neutral position) Approx. 2.4 V Approx. 2.4 V
Turn wheel to the right by 180°Approx. 4.4 V Approx. 4.4 V
Turn wheel to the left by 180°Approx. 0.4 V Approx. 0.4 V
Rear wheel steering angle sensor RAS control unit Continuity
Terminal 2 Terminal 7 Yes
Terminal 4 Terminal 4 Yes
SGIA1651E

TROUBLE DIAGNOSIS
STC-43
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Revision: 2007 April2007 M35/M45
Inspection 7: VDC MalfunctionNGS000EW
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.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform VDC self-diagnosis. Refer to BRC-24, "
Self-Diagnosis" .
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> Repair or replace indicated part. After that, perform RAS self-diagnosis again to make sure that
there is no malfunction.
Self-diagnosis results
VDC [C1929]
DTC (warning lamp blinks)
26

STC-44
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Inspection 8: Engine Speed Signal MalfunctionNGS000EX
1. CHECK SPEEDOMETER
Start the engine, and then check the combination meter (tachometer) operation.
Does it operate normally?
YES >> GO TO 2.
NO >> Combination meter. Refer to DI-5, "
COMBINATION METERS" .
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.
Inspection 9: CAN Communication System MalfunctionNGS000EY
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 CONSULT-II self-diagnosis.
Is above displayed on self-diagnosis display?
YES >>
If “CAN COMM [U1000]” is displayed, print out self–diagnosis. And then, GO TO LAN-50, "CAN
System Specification Chart" .

Replace RAS control unit if “CONTROL UNIT [CAN] [U1010]” is displayed.
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Self-diagnostic results
MOTOR OUTPUT [C1921]
DTC (warning lamp blinks)
33
Self-diagnostic results
CAN COMM CIRCUIT [U1000]
CONTROL UNIT (CAN) [U1010]

TROUBLE DIAGNOSIS
STC-45
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Revision: 2007 April2007 M35/M45
Inspection 10: Stop Lamp Switch HarnessNGS000EZ
1. CHECK STOP LAMP SWITCH SIGNAL
With CONSULT-II
Select “STOP LAMP SW” on DATA MONITOR, and then check the stop lamp switch.
Without CONSULT-II
1. Turn ignition switch OFF, disconnect RAS control unit harness connector B476.
2. Operate brake pedal, and then check voltage between RAS con-
trol unit harness connector B476 and ground.
OK or NG
OK >> Stop lamp switch harness is normal.
NG >> Stop lamp switch harness malfunction. Repair circuit.
Measuring condition Data monitor
Brake pedal depressed ON
Brake pedal released OFF
SGIA1277E
RAS C/U Ground Measuring condition Voltage
Terminal 22 —Brake pedal depressed Battery voltage (approx. 12 V)
Brake pedal released Approx. 0 V

STC-46
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Inspection 11: RAS Warning Lamp HarnessNGS000F0
1. CHECK RAS WARNING LAMP SIGNAL
Turn ignition switch ON, and then check voltage between RAS con-
trol unit harness connector B476 and ground.
OK or NG
OK >> Perform self-diagnosis. Refer to STC-28, "SELF-DIAG
RESULT MODE" .
NG >> GO TO 2.
2. CHECK RAS WARNING LAMP HARNESS
1. Turn ignition switch OFF, disconnect RAS control unit harness connector B476 and combination meter
harness connector M52.
2. Check continuity between RAS control unit harness connector
B476 and combination meter harness connector M52.
3. Check continuity between RAS control unit harness connector
B476 and ground.
OK or NG
OK >> GO TO combination meter power supply circuit.
NG >> Harness between RAS control unit and combination
meter open or shorted. Repair or replace harness.
RAS control unit Ground Voltage
Terminal 26 —Warning lamp OFF : Approx. 2.8 V or more
Warning lamp ON : Approx. 1.4 V or less
SGIA1278E
Terminal 26 − 19 : Continuity should exist.
SGIA1279E
Terminal 26 − Ground : Continuity should not exist.
SGIA1280E