2006 INFINITI M35 VDC

TROUBLE DIAGNOSIS
STC-31
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2006 January2006 M35/M45
Diagnosis Procedure with Self-Diagnosis Function (Without CONSULT- I I )NGS000EL
DESCRIPTION
If a malfunction is detected in the system, the RAS warning lamp turns on and indicates the malfunction. At
that time, fail-safe activates, and then stops the function.
SELF-DIAGNOSIS PROCEDURE
1. Start engine.
2. Turn steering wheel left and right at 20
or more and 5 times or more within 10 seconds. And then depress
the service brake 5 times or more.
3. RAS warning lamp blinks (displays normal/malfunction).
SELF-DIAGNOSIS DISPLAY
RAS warning lamp blinks and displays the self-diagnostic results.
Only DTCs are displayed as the pattern shown in the figure, and
then repeat the display.
If all items are normal, RAS warning lamp blinks at 4 Hz cycle.
SELF-DIAGNOSIS DISPLAY ITEMS
HOW TO ERASE SELF-DIAGNOSIS
If there is the history data for when the fail-safe has activated in the past, erase the memory with CONSULT-II.
Refer to STC-29, "
How to Erase Self-Diagnostic Results" .
CAN CommunicationNGS000EM
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. Refer to LAN-34, "
CAN
Communication Unit" .
SGIA1243E
DTC (warning lamp blinks) Diagnosis item Inspection item
11 RAS control unitSTC-35, "
Inspection 1: RAS Control Unit Malfunction"
12 Motor power supplySTC-35, "Inspection 2: Motor Power Supply System"
13 Motor outputSTC-37, "Inspection 3: RAS Motor Output Malfunction"
21 Vehicle speed signalSTC-38, "Inspection 4: Vehicle Speed Signal"
22 Steering angle signalSTC-38, "Inspection 5: Steering Angle Signal Malfunction"
24 Rear wheel steering angle (main)STC-40, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"
25 Rear wheel steering angle (sub)STC-40, "Inspection 6: Rear Main Signal and Rear Sub Signal
Malfunction"
26 VDCSTC-42, "Inspection 7: VDC Malfunction"
33 Engine speed signalSTC-43, "Inspection 8: Engine Speed Signal Malfunction"

TROUBLE DIAGNOSIS
STC-33
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2006 January2006 M35/M45
3. CHECK RAS CONTROL UNIT POWER SUPPLY CIRCUIT
Turn ignition switch ON, and then check voltage between RAS con-
trol unit harness connector B127 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 ChartNGS000EP
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 Control unit CONTROL_UNIT [ABNORMAL 1 - 9]STC-35
12 Motor power supplyMOTOR_VOLTAGE [LOW_VOLTAGE] (ꞏ a)
STC-35MOTOR_VOLTAGE [BAD_OBSTRCT] (ꞏ b)
13 Motor outputMOTOR_OUTPUT [ABNORMAL_SIG] (ꞏ a)
STC-37
MOTOR_OUTPUT [REV_CURRENT] (ꞏ c)
MOTOR_OUTPUT [NO_CURRENT] (ꞏ d)
MOTOR_OUTPUT [OVERCURRENT] (ꞏ e)
MOTOR_OUTPUT [MOTOR_LOCK] (ꞏ b)
21 Vehicle speed signal VEHICLE_SPEED_SEN [NO_SIGNAL]STC-38
22 Steering angle signalSTEERING_ANGLE_SEN [NO_CHANGE] (ꞏ a)
STC-38STEERING_ANGLE_SEN [NO_NEUT_STATE] (ꞏ b)
STEERING_ANGLE_SEN [NO_SIGNAL]
STEERING_ANGLE_SEN
24 Rear wheel steering angle (main)RR_ST_ANGLE_SENSOR [MAIN_SIGNAL] (ꞏ a)
STC-40
RR_ST_ANGLE_SENSOR [ABNORMAL_VOL] (ꞏ d)
RR_ST_ANGLE_SENSOR [OFFSET_SIG 1, 2] (ꞏ c)
25 Rear wheel steering angle (sub)RR_ST_ANGLE_SENSOR [SUB_SIGNAL] (ꞏ b)
RR_ST_ANGLE_SENSOR [ABNORMAL_VOL] (ꞏ d)
RR_ST_ANGLE_SENSOR [OFFSET_SIG 1, 2] (ꞏ c)
26 VDC VDCSTC-42
27 Engine speed signal MOTOR_OUTPUTSTC-43
— CAN COMM CIRCUIT
STC-43
— CONTROL UNIT

STC-42
[RAS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
5. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B104 and RAS
control unit harness connector B127.
2. Check continuity between each harness connector of rear wheel
steering angle sensor harness connector B104 and RAS control
unit harness connector B127.
OK or NG
OK >> Rear wheel steering angle sensor malfunction. Replace rear wheel steering angle sensor.
NG >> Harness between rear wheel steering angle sensor and RAS control unit open or shorted. Repair
or replace harness.
Inspection 7: VDC MalfunctionNGS000EW
1. CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle
sensor harness 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 SELF-DIAGNOSTIC RESULTS
Perform VDC self-diagnosis. Refer to BRC-23, "
Self-Diagnosis" .
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> Repair or replace indicated part. After that, perform RAS self-diagnosis again to make sure that
there is no malfunction.
SGIA1276E
Rear wheel steering angle sensor RAS C/U Continuity
Te r m i n a l 2 Te r m i n a l 7 Ye s
Te r m i n a l 4 Te r m i n a l 4 Ye s
Self-diagnosis results
VDC
DTC (warning lamp blinks)
26