Infiniti G35 (V35). Manual — part 781
STC-28
[RAS]
TROUBLE DIAGNOSIS
2.
CHECK RAS CONTROL UNIT GROUND CIRCUIT
1.
Disconnect RAS control unit harness connector.
2.
Check continuity between RAS control unit harness connector
and ground.
OK or NG
OK
>> GO TO 3.
NG
>> Ground circuit open or shorted. Repair or replace any
inoperative parts.
3.
CHECK RAS CONTROL UNIT POWER SUPPLY CIRCUIT
Turn ignition switch ON, and then check voltage between RAS con-
trol unit harness connector and ground.
OK or NG
OK
>> Power supply and ground circuit are normal.
NG
>> Power supply circuit open or shorted. Repair or replace
any inoperative parts.
Trouble Diagnosis Chart
NGS0009O
SELF-DIAGNOSIS
Connector
Terminal
Continuity
B136
34
−
Ground
Yes
SGIA1244E
Connector
Terminal
Voltage
B136
27
−
Ground
Battery voltage (Approx. 12 V)
SGIA1245E
Item
Reference
Self-diagnosis function
CONSULT-II
DTC
(warning
lamp blinks)
Diagnosis item
Diagnosis item
11
Control unit
CONTROL UNIT [ABNORMAL 1 - 9]
12
Motor power supply
MOTOR VOLTAGE [LOW VOLTAGE]
MOTOR VOLTAGE [BAD OBSTRCT]
13
Motor output
MOTOR OUTPUT [ABNORMAL SIG]
MOTOR OUTPUT [REV CURRENT]
MOTOR OUTPUT [NO CURRENT]
MOTOR OUTPUT [OVER CURRENT]
MOTOR OUTPUT [MOTOR LOCK]
21
Vehicle speed signal
VEHICLE SPEED SEN [NO SIGNAL]
22
Steering angle signal
STEERING ANGLE SEN [NO CHANGE]
STEERING ANGLE SEN [NO NEUT STATE]
STEERING ANGLE SEN [NO SIGNAL]
STEERING ANGLE SEN
TROUBLE DIAGNOSIS
STC-29
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
DIAGNOSIS CHART BY SYMPTOM
24
Rear wheel steering angle (main)
RR ST ANGLE SENSOR [MAIN SIGNAL]
RR ST ANGLE SENSOR [ABNORMAL VOL]
RR ST ANGLE SENSOR [OFFSET SIG1, 2]
25
Rear wheel steering angle (sub)
RR ST ANGLE SENSOR [SUB AIGNAL]
RR ST ANGLE SENSOR [ABNORMAL VOL]
RR ST ANGLE SENSOR [OFFSET SIG1, 2]
26
VDC
VDC
27
Engine speed signal
MOTOR OUTPUT
—
CAN COMM CIRCUIT [U1000]
—
CONTROL UNIT (CAN) [U1010]
Symptom
Reference
It is not entering the self-diagnosis mode.
STC-27, "BASIC INSPECTION 3: RAS CONTROL UNIT POWER
SUPPLY CIRCUIT AND GROUND CIRCUIT INSPECTION"
STC-39, "Inspection 10: Stop Lamp Switch Harness"
STC-39, "Inspection 11: RAS Warning Lamp Harness"
RAS warning lamp does not turn on with ignition switch ON.
STC-27, "BASIC INSPECTION 3: RAS CONTROL UNIT POWER
SUPPLY CIRCUIT AND GROUND CIRCUIT INSPECTION"
STC-39, "Inspection 11: RAS Warning Lamp Harness"
RAS warning lamp turns on with ignition switch ON. It does
not turn off even if the engine is started.
●
●
STC-26, "Diagnosis Procedure With Self-Diagnosis Function (With-
out CONSULT-II)"
RAS warning lamp may turn on after the engine is started.
The steering force does not change smoothly according to
the vehicle speed.
STC-41, "Diagnosis Chart by Symptom 2"
Noise
●
●
STC-26, "Diagnosis Procedure With Self-Diagnosis Function (With-
out CONSULT-II)"
STC-8, "INSPECTION AFTER DISASSEMBLY"
Malfunction other than above
STC-30
[RAS]
TROUBLE DIAGNOSIS
Inspection 1: RAS Control Unit Malfunction
NGS0009P
1.
CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
With CONSULT-II
Without CONSULT-II
Is above displayed on self-diagnosis display?
YES
>> Replace RAS control unit. Perform self-diagnosis again after replacing.
NO
>> INSPECTION END
Inspection 2: Motor Power Supply System
NGS0009Q
1.
CHECK RAS CONTROL UNIT CONNECTOR
1.
Turn ignition switch OFF, disconnect RAS control unit harness connector and motor 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 RAS MOTOR RELAY BATTERY CIRCUIT
1.
Turn ignition switch OFF, and disconnect RAS motor relay har-
ness connector.
2.
Check voltage between RAS motor relay harness connector and
ground.
OK or NG
OK
>> GO TO 3.
NG
>> RAS motor relay power supply circuit open or shorted.
Repair or replace power supply circuit and fuse.
Self-diagnostic results
CONTROL UNIT [ABNORMAL1 - 9]
DTC (warning lamp blinks)
11
Self-diagnosis results
MOTOR VOLTAGE [LOW VOLTAGE]
MOTOR VOLTAGE [BAD OBSTRCT]
DTC (warning lamp blinks)
12
Connector
Terminal
Voltage
B139
3
−
Ground
Battery voltage (Approx. 12 V)
SGIA1246E
TROUBLE DIAGNOSIS
STC-31
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
3.
CHECK RAS MOTOR RELAY HARNESS
1.
Disconnect RAS motor relay harness connector and RAS control unit harness connector.
2.
Check continuity between the following terminals.
–
RAS motor relay harness connector B139 terminal 5 and RAS
control unit harness connector B136 terminal 37.
–
RAS motor relay harness connector B139 terminal 1 and RAS
control unit harness connector B136 terminal 25.
–
RAS motor relay harness connector B139 terminal 2 and
ground.
OK or NG
OK
>> GO TO 4.
NG
>> RAS motor relay harness open or shorted. Repair or replace applicable malfunctioning harness.
4.
CHECK RAS MOTOR RELAY RESISTANCE
Check the resistance between RAS motor relay connector.
OK or NG
OK
>> GO TO 5.
NG
>> RAS motor relay malfunction (replacement)
5.
CHECK RAS CONTROL UNIT OUTPUT SIGNAL
1.
Connect RAS control unit harness connector and RAS motor
relay harness connector.
2.
Check voltage between RAS motor relay harness connector and
ground.
OK or NG
OK
>> Check RAS motor relay separately from other parts.
Refer to
NG
>> RAS control unit malfunction (replacement)
Continuity should exist.
SGIA1265E
Connector
Terminal
Resistance
B139
1
−
2
Approx. 74
Ω
SGIA1266E
Connector
Terminal
Condition
Voltage
B139
1
−
Ground
Ignition switch ON
Battery voltage (Approx. 12 V)
Ignition switch OFF
Approx. 0 V
SGIA1267E
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