Infiniti G35 (V35) Sedan. Manual — part 1315
STC-150
< ECU DIAGNOSIS >
[WITH 4WAS]
4WAS FRONT CONTROL UNIT
JCGWA0008GB
4WAS FRONT CONTROL UNIT
STC-151
< ECU DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
Fail Safe
INFOID:0000000000958918
4WAS system (front)
• 4WAS system enters in the fail-safe mode (4WAS system stopped), and 4WAS warning lamp turns ON if an
error is detected in 4WAS system (4WAS front control unit and 4WAS main control unit) component part.
• 4WAS system enters in the protection function mode (4WAS system temporarily stopped) if 4WAS system
continues the heavy load condition and the overheat condition.4WAS system reactivates automatically if the
JCGWA0009GB
STC-152
< ECU DIAGNOSIS >
[WITH 4WAS]
4WAS FRONT CONTROL UNIT
heavy load condition and the overheat condition are resolved.4WAS warning lamp continues turning OFF in
the protection function mode.
*: Communication line between 4WAS front control unit and 4WAS main control unit.
DTC Inspection Priority Chart
INFOID:0000000000958919
Function
Warn-
ing
lamp
DTC No.
Detected area (Error area)
Error area and root cause
Protec-
tion
function
Turn-
OFF
—
4WAS front control unit
4WAS front control unit overheat condition
Protec-
tion
function
Turn-
OFF
—
4WAS front actuator
4WAS front actuator overheat condition
Protec-
tion
function
Turn-
OFF
—
4WAS front control unit
4WAS front control unit heavy load condition
Fail-safe
mode
Turn-
ON
C1621
C1622
4WAS front actuator
4WAS front control unit or 4WAS front motor error is detected.
Fail-safe
mode
Turn-
ON
C1627
4WAS front actuator
4WAS front actuator error
Fail-safe
mode
Turn-
ON
C1628
Front wheel steering angle
sensor
Front wheel steering angle sensor error
Fail-safe
mode
Turn-
ON
C1631
C1632
4WAS front control unit
4WAS front control unit or 4WAS front control unit power supply er-
ror is detected.
Fail-safe
mode
Turn-
OFF
C1633
4WAS front control unit
4WAS front control unit error
Fail-safe
mode
Turn-
ON
C1651
4WAS front control unit
4WAS front control unit or the ignition power supply error is detect-
ed.
Fail-safe
mode
Turn-
ON
C1652
4WAS front control unit
4WAS front control unit or 4WAS front motor power supply error is
detected.
Fail-safe
mode
Turn-
ON
C1654
4WAS front control unit
The main relay power supply inside 4WAS front control unit error is
detected.
Fail-safe
mode
Turn-
ON
C1655
4WAS front control unit
4WAS front control unit or 4WAS front motor power supply error is
detected.
Fail-safe
mode
Turn-
ON
C1661
4WAS front lock solenoid
valve (lock structure)
4WAS front control unit or 4WAS front lock solenoid valve error is
detected.
Fail-safe
mode
Turn-
ON
C1667
4WAS front actuator
The inside 4WAS front actuator error is detected.
Fail-safe
mode
Turn-
ON
C1668
4WAS front actuator
The inside 4WAS front actuator error is detected.
Fail-safe
mode
Turn-
ON
C1669
4WAS front actuator
The power steering oil pressure or the inside 4WAS front actuator
error is detected.
Fail-safe
mode
Turn-
ON
C1671
4WAS front actuator
4WAS front actuator adjustment is not performed.
Fail-safe
mode
Turn-
ON
C1672
4WAS main actuator
4WAS front actuator adjustment is incomplete.
Fail-safe
mode
Turn-
ON
C1684
C1685
U1000
U1002
U1010
4WAS communication line*/
4WAS main control unit/4WAS
front control unit
4WAS communication line*/4WAS main control unit/4WAS front
control unit error
Fail-safe
mode
Turn-
ON
C1686
4WAS main control unit
4WAS main control unit fail-safe mode
4WAS FRONT CONTROL UNIT
STC-153
< ECU DIAGNOSIS >
[WITH 4WAS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
*: 4WAS communication line
DTC Index
INFOID:0000000000958920
Priority
Detected items (DTC)
1
• U1000 CANCOMM CIRCUIT*
• U1002 SYSTEM COMM(CAN)*
• U1010 CONTROL UNIT(CAN)*
2
• C1671 ACT ADJ NOT PRFRM
• C1672 INCOMP ACTUATR ADJ
3
• C1631 CONTROL UNIT
• C1632 CONTROL UNIT
4
• C1651 IGN POWER SUPPLY
• C1652 MOTOR POWER SUPPLY
• C1654 ACTUATOR RELAY
• C1655 PRE-DRIVER
5
• C1621 ACTUATOR
• C1622 ACTUATOR
• C1627 ACTUATOR
• C1628 ACTUATOR
• C1661 LOCK SOLENOID
• C1667 LOCK INSERTION
• C1668 LOCK HLD GAP DETCT
• C1669 INCOMP LOCK RELEAS
6
• C1684 4WAS MAIN ECU COMM
• C1685 4WAS MAIN ECU COMM
• C1686 4WAS MAIN ECU
7
• C1633 CONTROL UNIT
DTC
Items
(CONSULT-III screen terms)
Reference
C1621
ACTUATOR
C1622
ACTUATOR
C1627
ACTUATOR
C1628
ACTUATOR
C1631
CONTROL UNIT
C1632
CONTROL UNIT
C1633
CONTROL UNIT
C1651
IGN POWER SUPPLY
C1652
MOTOR POWER SUPPLY
C1654
ACTUATOR RELAY
C1655
PRE-DRIVER
C1661
LOCK SOLENOID
C1667
LOCK INSERTION
C1668
LOCK HLD GAP DETCT
C1669
INCOMP LOCK RELEAS
C1671
ACT ADJ NOT PRFRM
C1672
INCOMP ACTUATR ADJ
C1684
4WAS MAIN ECU COMM
C1685
4WAS MAIN ECU COMM
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