Infiniti M35/M45 Y50. Manual — part 1119
TROUBLE DIAGNOSIS
STC-33
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
3.
CHECK RAS CONTROL UNIT POWER SUPPLY CIRCUIT
Turn ignition switch ON, and then check voltage between RAS con-
trol unit harness connector B476 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
NGS000EP
SELF-DIAGNOSIS
Terminal 27 – Ground
: Battery voltage (Approx. 12 V)
SGIA1245E
Item
Reference
Self-diagnosis function
CONSULT-II
DTC
(warning
lamp blinks)
Diagnosis item
Diagnosis item
11
RAS control unit
CONTROL UNIT [ABNORMAL1] [C1900]
CONTROL UNIT [ABNORMAL2] [C1901]
CONTROL UNIT [ABNORMAL3] [C1905]
CONTROL UNIT [ABNORMAL5] [C1906]
CONTROL UNIT [ABNORMAL4] [C1907]
CONTROL UNIT [ABNORMAL7] [C1908]
CONTROL UNIT [ABNORMAL6] [C1909]
CONTROL UNIT [ABNORMAL8] [C1922]
CONTROL UNIT [ABNORMAL5] [C1927]
CONTROL UNIT [ABNORMAL9] [C1928]
12
Motor power supply
MOTOR VOLTAGE [LOW VOLTAGE] [C1911]
MOTOR VOLTAGE [BAD OBSTRCT] [C1912]
13
Motor output
MOTOR OUTPUT [ABNORMAL SIG] [C1913]
MOTOR OUTPUT [REV CURRENT] [C1902]
MOTOR OUTPUT [NO CURRENT] [C1903]
MOTOR OUTPUT [OVERCURRENT] [C1904]
MOTOR OUTPUT [MOTOR LOCK] [C1910]
21
Vehicle speed signal
VEHICLE SPEED SEN [NO SIGNAL] [C1919]
22
Steering angle signal
STEERING ANGLE SEN [NO CHANGE] [C1923]
STEERING ANGLE SEN [NO NEUT STATE] [C1924]
STEERING ANGLE SEN [NO SIGNAL] [C1920]
STEERING ANGLE SEN [C1926]
STC-34
[RAS]
TROUBLE DIAGNOSIS
DIAGNOSIS CHART BY SYMPTOM
24
Rear wheel steering angle (main)
RR ST ANGLE SENSOR [MAIN SIGNAL] [C1915]
RR ST ANGLE SENSOR [ABNORMAL VOL] [C1914]
RR ST ANGLE SENSOR [OFFSET SIG1] [C1917]
RR ST ANGLE SENSOR [OFFSET SIG2] [C1918]
25
Rear wheel steering angle (sub)
RR ST ANGLE SENSOR [SUB SIGNAL] [C1916]
RR ST ANGLE SENSOR [ABNORMAL VOL] [C1914]
RR ST ANGLE SENSOR [OFFSET SIG1] [C1917]
RR ST ANGLE SENSOR [OFFSET SIG2] [C1918]
26
VDC
VDC [C1929]
33
Engine speed signal
MOTOR OUTPUT [C1921]
—
CAN COMM CIRCUIT [U1000]
—
CONTROL UNIT (CAN) [U1010]
Symptom
Reference
It is not entering the self-diagnosis mode.
STC-32, "BASIC INSPECTION 3: RAS CONTROL UNIT POWER
SUPPLY CIRCUIT AND GROUND CIRCUIT INSPECTION"
STC-45, "Inspection 10: Stop Lamp Switch Harness"
STC-46, "Inspection 11: RAS Warning Lamp Harness"
RAS warning lamp does not turn on with ignition switch ON.
STC-32, "BASIC INSPECTION 3: RAS CONTROL UNIT POWER
SUPPLY CIRCUIT AND GROUND CIRCUIT INSPECTION"
STC-46, "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-28, "SELF-DIAG RESULT MODE"
●
STC-31, "Diagnosis Procedure with Self-Diagnosis Function
(Without CONSULT-II)"
RAS warning lamp may turn on after the engine is started.
STC-28, "SELF-DIAG RESULT MODE"
The steering force does not change smoothly according to the
vehicle speed.
STC-47, "Diagnosis Chart by Symptom 2"
Noise
●
STC-28, "SELF-DIAG RESULT MODE"
●
STC-31, "Diagnosis Procedure with Self-Diagnosis Function
(Without CONSULT-II)"
STC-14, "INSPECTION AFTER DISASSEMBLY"
Malfunction other than above
TROUBLE DIAGNOSIS
STC-35
[RAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
Inspection 1: RAS Control Unit Malfunction
NGS000EQ
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
NGS000ER
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.
Self-diagnostic results
CONTROL UNIT [ABNORMAL1] [C1900]
CONTROL UNIT [ABNORMAL2] [C1901]
CONTROL UNIT [ABNORMAL3] [C1905]
CONTROL UNIT [ABNORMAL5] [C1906]
CONTROL UNIT [ABNORMAL4] [C1907]
CONTROL UNIT [ABNORMAL7] [C1908]
CONTROL UNIT [ABNORMAL6] [C1909]
CONTROL UNIT [ABNORMAL8] [C1922]
CONTROL UNIT [ABNORMAL5] [C1927]
CONTROL UNIT [ABNORMAL9] [C1928]
DTC (warning lamp blinks)
11
Self-diagnosis results
MOTOR VOLTAGE [LOW VOLTAGE] [C1911]
MOTOR VOLTAGE [BAD OBSTRCT] [C1912]
DTC (warning lamp blinks)
12
STC-36
[RAS]
TROUBLE DIAGNOSIS
2.
CHECK RAS MOTOR RELAY BATTERY CIRCUIT
1.
Turn ignition switch OFF, and disconnect RAS motor relay harness connector B480.
2.
Check voltage between RAS motor relay harness connector
B480 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.
3.
CHECK RAS MOTOR RELAY HARNESS
1.
Disconnect RAS motor relay harness connector B480 and RAS control unit harness connector B476.
2.
Check continuity between RAS motor relay harness connector
B480 and RAS control unit harness connector B476.
3.
Check continuity between RAS motor relay harness connector
B480 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)
Terminal 3 – Ground
: Battery voltage (Approx. 12 V)
SGIA1246E
Terminal 5 – 37
: Continuity should exist.
Terminal 1 – 25
: Continuity should exist.
2 – Ground
: Continuity should exist.
SGIA1265E
Terminal 1 – 2
: Approx. 74
Ω
SGIA1266E
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