Infiniti Q45. Manual — part 893
TROUBLE DIAGNOSIS FOR SYSTEM
STC-75
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
DTC U1000 CAN COMM
NGS0008O
●
Check the following if “CAN COMM [U1000]” is detected in self-diagnosis results with CONSULT-II.
DIAGNOSTIC PROCEDURE
1.
CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1.
Turn ignition switch “ON” and start engine.
2.
Select “SELF-DIAG RESULTS” mode for “RAS/HICAS” within CONSULT-II.
3.
Perform the self-diagnosis.
Is the “CAN COMM CIRCUIT [U1000]” displayed?
YES
>> Print out CONSULT-II screen and go to
cautions When Using CONSULT-II"
NO
>> INSPECTION END
DTC U1010 CONTROL UNIT (CAN)
NGS0008P
●
Check the following if “CONTROL UNIT (CAN) [U1010]” is detected in self-diagnosis results with CON-
SULT-II.
DIAGNOSTIC PROCEDURE
1.
CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1.
Turn ignition switch “ON” and start engine.
2.
Select “SELF-DIAG RESULTS” mode for “RAS/HICAS” within CONSULT-II.
3.
Perform the self-diagnosis.
Is the “CAN COMM CIRCUIT [U1010]” displayed?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
PERFORM SELF-DIAGNOSIS
With CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “SELF-DIAG RESULTS” mode for “RAS/HICAS” with CONSULT-II.
3.
Touch “ERASE”.
4.
Turn ignition switch “OFF” and wait at least 10 seconds.
5.
Perform the self-diagnosis, after driving a vehicle for a while.
Is the “U1010 CONTROL UNIT (CAN)” displayed?
YES
>> Replace RAS control unit. Refer to
STC-90, "Removal and Installation"
.
NO
>> INSPECTION END
SDIA1850E
SGIA1488E
STC-76
[WITH REAR ACTIVE STEER]
TROUBLE DIAGNOSIS FOR SYSTEM
RAS Actuator Assembly
NGS0008X
DIAGNOSTIC PROCEDURE
1.
CHECK (1): RAS ACTUATOR ASSEMBLY STROKE
Perform CONSULT-II “ACTIVE TEST”, and then check the RAS
actuator assembly stroke “S” when turning the steering wheel clock-
wise or counterclockwise by 180
°
or more. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK (2): RAS ACTUATOR ASSEMBLY STROKE
Perform CONSULT-II “ACTIVE TEST“. When turning the steering
wheel in neutral position “N”, the rear wheel turns clockwise/counter-
clockwise periodically. At that time, check RAS actuator assembly
stroke “S”. Refer to
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
CHECK RAS MOTOR
Check RAS motor. Refer to
.
OK or NG
OK
>> GO TO 4.
NG
>> Check the RAS actuator assembly stroke again after replacing.
4.
CHECK REAR WHEEL STEERING ANGLE SENSOR
Check rear wheel steering angle sensor. Refer to
STC-83, "REAR WHEEL STEERING ANGLE SENSOR"
OK or NG
OK
>> GO TO 5.
NG
>> Rear wheel steering angle sensor malfunction. Check the stroke again after replacing.
5.
CHECK (1): RAS ACTUATOR ASSEMBLY STROKE AGAIN
Check RAS actuator assembly stroke again after checking rear suspension components.
OK or NG
OK
>> GO TO 6.
NG
>> RAS actuator assembly is malfunctioning. Replace RAS actuator assembly.
RAS actuator stroke “S”
: 2.8 – 3.0 mm (0.110 – 0.118 in)
SGIA1601E
RAS actuator stroke “S”
: 2.3 – 2.5 mm (0.091 – 0.098 in)
SGIA1601E
TROUBLE DIAGNOSIS FOR SYSTEM
STC-77
[WITH REAR ACTIVE STEER]
C
D
E
F
H
I
J
K
L
M
A
B
STC
6.
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 7.
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.
7.
CHECK (2): RAS ACTUATOR ASSEMBLY STROKE AGAIN
Check RAS actuator assembly stroke again.
OK or NG
OK
>> INSPECTION END
NG
>> Replace RAS control unit. Refer to
STC-90, "Removal and Installation"
.
Power Steering Solenoid Valve
NGS0006V
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 terminal.
Monitored item
Content
Condition
Display value
POWER STR SOL [A]
Monitored value of current at
power steering solenoid
valve
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
Approx. 1.10 A
Vehicle speed: 100 km/h (62 MPH)
Approx. 0.54 A
Terminal
Wire
color
Item
Condition
Data (Approx.)
36
LG
Power steering solenoid valve
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
4.4 - 6.6 V
Vehicle speed: 100 km/h (62 MPH)
2.4 - 3.6 V
STC-78
[WITH REAR ACTIVE STEER]
TROUBLE DIAGNOSIS FOR SYSTEM
DIAGNOSTIC PROCEDURE
1.
CHECK POWER STEERING SOLENOID VALVE SIGNAL
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “RAS/HICAS” with CONSULT-II.
3.
Read out the value of “POWER STR SOL”.
Without CONSULT-II
1.
Start engine.
2.
Check signal between RAS control unit harness connector (A)
terminal and ground.
OK or NG
OK >> GO
TO
5.
NG
>> GO TO 2.
2.
CHECK POWER STEERING SOLENOID VALVE GROUND CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect power steering solenoid valve harness connector.
3.
Check continuity between power steering solenoid valve har-
ness connector (A) F3 terminal 2 and ground.
Also check harness for short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
Condition
Display value
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
Approx. 1.10 A
Vehicle speed: 100 km/h (62 MPH)
Approx. 0.54 A
SGIA1405E
Connector
Terminal
Condition
Data
(Approx.)
B39
36 -
Ground
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
4.4 - 6.6 V
Vehicle speed: 100 km/h (62 MPH)
2.4 - 3.6 V
SGIA1489E
Continuity should exist.
SGIA1411E
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