Infiniti Q45. Manual — part 889
TROUBLE DIAGNOSIS FOR SYSTEM
STC-59
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
3.
CHECK RAS MOTOR
1.
Turn ignition switch “OFF”.
2.
Disconnect RAS motor harness connector.
3.
Remove RAS motor. Refer to
4.
Check operation by supply 6 V (B) voltage to RAS motor con-
nector (A) terminals 1 and 2.
CAUTION:
●
Never supply 12 V voltage (battery, etc.) to the RAS
motor.
●
Never operate RAS motor for more than 1 second.
●
Be careful not to overheat the harness.
5.
Check continuity between RAS motor connector (A) terminals 1
and 2.
OK or NG
OK
>> GO TO 4.
NG
>> Replace RAS motor.
4.
CHECK RAS CONTROL UNIT
Check RAS control unit input/output signal. Refer to
STC-47, "RAS Control Unit Input/Output Signal Refer-
.
OK or NG
OK
>> GO TO 5.
NG
>> Check RAS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
5.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK
>> INSPECTION END
NG
>> Replace RAS control unit. Refer to
STC-90, "Removal and Installation"
.
Terminal
Actuator motor
1 (Positive) - 2 (Negative)
Clockwise rotate
2 (Positive) - 1 (Negative)
Counterclockwise rotate
SGIA1473E
1 – 2
: Approx. 0.45
Ω
SGIA1474E
STC-60
[WITH REAR ACTIVE STEER]
TROUBLE DIAGNOSIS FOR SYSTEM
DTC C1909 CONTROL UNIT
NGS0006X
●
Check the following if “CONTROL UNIT [ABNORMAL6] [C1909]” is detected in self-diagnosis results with
CONSULT-II or “flickering pattern for 11” is detected in self-diagnosis results without CONSULT-II.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
RAS CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
DIAGNOSTIC PROCEDURE
1.
INSPECTION START
Is CONSULT-II available?
YES or NO
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK POWER SUPPLY SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “RAS/HICAS” with CONSULT-II.
3.
Read out the value of “C/U VOLTAGE”.
OK or NG
OK >> GO
TO
5.
NG
>> GO TO 3.
Monitored item
Content
Condition
Display value
C/U VOLTAGE [V]
Power supply voltage for
RAS control unit
Ignition switch: ON
Battery voltage
Ignition switch: OFF
—
Terminal
Wire
color
Item
Condition
Data (Approx.)
27
GY
Ignition switch
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
34
B
Ground
Always
0 V
Monitored item
Condition
Display value
C/U VOLTAGE
Ignition switch: ON
Battery voltage
SGIA1468E
TROUBLE DIAGNOSIS FOR SYSTEM
STC-61
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
3.
CHECK POWER SUPPLY
1.
Turn ignition switch “OFF”.
2.
Disconnect RAS control unit harness connector.
3.
Check voltage between RAS control unit harness connector (A)
terminal and ground.
4.
Turn ignition switch “ON”. (Do not start engine.)
5.
Check voltage between RAS control unit harness connector (A)
terminal and ground.
OK or NG
OK
>> GO TO 4.
NG
>> Check the following. If any items are damaged, repair or
replace damaged parts.
●
10 A fuse [No. 7 located in the fuse block (J/B) No.1].
Refer to
●
Harness for short or open between ignition switch and RAS control unit harness connector B39
terminal 27.
●
Ignition switch. Refer to
.
4.
CHECK GROUND CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect RAS control unit harness connector.
3.
Check continuity between RAS control unit harness connector
(A) B39 terminal 34 and ground.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to power in harness or con-
nectors.
5.
CHECK RAS CONTROL UNIT
Check RAS control unit input/output signal. Refer to
STC-47, "RAS Control Unit Input/Output Signal Refer-
.
OK or NG
OK
>> GO TO 6.
NG
>> Check RAS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
Connector
Terminal
Voltage (Approx.)
B39
27 - Ground
0 V
SGIA1461E
Connector
Terminal
Voltage (Approx.)
B39
27 - Ground
Battery voltage
SGIA1462E
Continuity should exist.
SGIA1463E
STC-62
[WITH REAR ACTIVE STEER]
TROUBLE DIAGNOSIS FOR SYSTEM
6.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK
>> INSPECTION END
NG
>> Replace RAS control unit. Refer to
STC-90, "Removal and Installation"
DTC C1911, C1912 MOTOR VOLTAGE
NGS0008J
●
Check the following if “MOTOR VOLTAGE [LOW VOLTEGE] [C1911]” or “MOTOR VOLTAGE [BAD
OBSTRCT] [C1912]” is detected in self-diagnosis results with CONSULT-II or “flickering pattern for 12” is
detected in self-diagnosis results without CONSULT-II.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
RAS CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
DIAGNOSTIC PROCEDURE
1.
INSPECTION START
Is CONSULT-II available?
YES or NO
YES
>> GO TO 2.
NO
>> GO TO 3.
Monitored item
Content
Condition
Display value
C/U VOLTAGE [V]
Power supply voltage for
RAS control unit
Ignition switch: ON
Battery voltage
Ignition switch: OFF
—
MOTOR VOLTAGE [V]
Monitored value of voltage
at RAS motor
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
HICAS RELAY [ON/OFF]
RAS motor relay condition
Ignition switch: ON
ON
Ignition switch: OFF
OFF
Terminal
Wire
color
Item
Condition
Data (Approx.)
25
L/W
RAS motor relay
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
27
GY
Ignition switch
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
37
L/Y
Power supply
(RAS motor)
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
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