2007 INFINITI M35 sensor

TROUBLE DIAGNOSIS
STC-29
[RAS]
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STC
Revision: 2007 April2007 M35/M45
How to Erase Self-Diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine, and touch “START (NISSAN BASED VHCL)” “RAS/HICAS” “SELF-DIAG RESULTS” and
“ERASE” in this order to erase the diagnostic memory.
CAUTION:
If memory cannot be erased, repeat step 1, 2.
3. Perform self-diagnosis again, and make sure that DTC memory is erased.
C1910 MOTOR OUTPUT [MOTOR LOCK]When 17 A or more current flows to
the motor, the rear wheel steering
angle sensor signal does not
change for some time.STC-37
C1919 VEHICLE SPEED SEN [NO SIGNAL]No vehicle speed signal is input for
some time.STC-38
C1900 CONTROL UNIT [ABNORMAL1]
Control unit malfunctionSTC-35
C1901 CONTROL UNIT [ABNORMAL2]
C1905 CONTROL UNIT [ABNORMAL3]
C1906 CONTROL UNIT [ABNORMAL5]
C1907 CONTROL UNIT [ABNORMAL4]
C1908 CONTROL UNIT [ABNORMAL7]
C1909 CONTROL UNIT [ABNORMAL6]
C1922 CONTROL UNIT [ABNORMAL8]
C1927 CONTROL UNIT [ABNORMAL5]
C1928 CONTROL UNIT [ABNORMAL9]
C1920 STEERING ANGLE SEN [NO SIGNAL]No steering angle signal is input for
some time.STC-39
C1926 STEERING ANGLE SEN

An unexpected signal is input.

Steering angle sensor outputs the
malfunction signal.STC-39
C1929 VDCABS actuator and electric unit (con-
trol unit) outputs the malfunction
signal.STC-43
U1000 CAN COMM CIRCUITWhen a RAS control unit is not
transmitting or receiving CAN com-
munication signal 2 seconds or
more.STC-44
U1010 CONTROL UNIT (CAN)When detecting error during the ini-
tial diagnosis of CAN controller of
RAS control unit.STC-44
DTC Diagnostic item Diagnostic item is detected when... Check items

STC-30
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor is displayed.
NOTE:
When malfunction is detected, CONSULT-II performs REAL-TIME DIAGNOSIS. Also, any malfunction
detected while in this mode will be displayed in real time.
Display Item List
ACTIVE TEST MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. When turning the steering wheel right or left, the rear wheel turns in the same direction. If the steering
wheel is not turned, the rear wheel turns left and right 5 times.
RAS CONTROL UNIT PART NUMBER
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. The part number described on RAS control unit sticker is displayed.
Item [Display or Unit] Remarks
VHCL SPEED SE [km/h] or [mph] Vehicle speed received via CAN communication is displayed.
STEERING ANG [°] Steering angle received via CAN communication is displayed.
ENGINE SPEED [rpm] Engine speed received via CAN communication is displayed.
POWER STR SOL [A]Power steering solenoid controlling current that RAS control unit
outputs is displayed.
RR ST ANG-MAI [V]Rear wheel steering angle main sensor output voltage is dis-
played.
RR ST ANG-SUB [V] Rear wheel steering angle sub sensor output voltage is displayed.
RR ST ANG VOL [V]Voltage supplied from RAS control unit to rear wheel steering
angle sensor is displayed.
C/U VOLTAGE [V] Voltage supplied to RAS control unit is displayed.
MOTOR VOLTAGE [V] Voltage supplied from RAS control unit to RAS motor is displayed.
MOTOR CURRENT [A]RAS motor relay controlling current that RAS control unit outputs
is displayed.
MOTOR CRNT OPE [A] Current commanded value to RAS motor is displayed.
RR ANG OPE [°]Angle commanded value to rear wheel steering angle sensor is
displayed.
STOP LAMP SW [ON/OFF] Condition of stop lamp switch ON/OFF is displayed.
HICAS RELAY [ON/OFF] RAS motor relay ON/OFF condition is displayed.
FAILSAFE [ON/OFF] Fail-safe ON/OFF condition is displayed.
WARNING LAMP [ON/OFF] RAS warning lamp operating condition is displayed.
STEERING ANG RR ST ANG MAI RR ST ANG SUB MOTOR CURRENT
0° (Neutral) 2.4 V 2.4 V No output (Approx. 0 A)
R 90°Approx. 4.4 V Approx. 4.4 V
Output (change)
L 90°Approx. 0.4 V Approx. 0.4 V

STC-34
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
DIAGNOSIS CHART BY SYMPTOM
24 Rear wheel steering angle (main)RR ST ANGLE SENSOR [MAIN SIGNAL] [C1915]
STC-40RR 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]STC-43
33 Engine speed signal MOTOR OUTPUT [C1921]STC-44
— CAN COMM CIRCUIT [U1000]
STC-44
— 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-32, "
Basic Inspection"

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 aboveSTC-47, "Diagnosis Chart by Symptom 1"

TROUBLE DIAGNOSIS
STC-39
[RAS]
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STC
Revision: 2007 April2007 M35/M45
Inspection 5: Steering Angle Signal MalfunctionNGS000EU
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector and steering angle sensor har-
ness 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. ADJUST NEUTRAL POSITION OF STEERING ANGLE SENSOR
Adjust the steering angle sensor neutral position, and then perform self-diagnosis again. Refer to BRC-6,
"Adjustment of Steering Angle Sensor Neutral Position" .
Is the result of self-diagnosis normal?
OK >> Inappropriate neutral position adjustment of steering angle sensor.
NG >> GO TO 3.
3. CHECK STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, and disconnect steering angle sensor harness connector M47.
2. Check continuity steering angle sensor harness connector M47
and ground.
3. Turn ignition switch ON, and then check voltage steering angle
sensor harness connector M47 and ground.
OK or NG
OK >> GO TO 4.
NG >> Steering angle sensor power supply and ground circuit
open or shorted. Repair or replace the applicable mal-
functioning circuit.
Self-diagnosis results
STEERING ANGLE SEN [NO CHANGE] [C1923]
STEERING ANGLE SEN [NO NEUT STATE] [C1924]
STEERING ANGLE SEN [NO SIGNAL] [C1920]
STEERING ANGLE SEN [C1926]
DTC (warning lamp blinks)
22
Steering angle sensor Ground Continuity
Terminal 2 — Yes
SGIA1270E
Steering angle sensor Ground Continuity
Terminal 3 —Battery voltage
(approx. 12V)
SGIA1271E

STC-40
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
4. DATA MONITOR
1. Connect steering angle sensor harness connector.
2. Select “DATA MONITOR” on “STEERING ANG” mode, and then check the steering angle.
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to BRC-
6, "Adjustment of Steering Angle Sensor Neutral Position" .
Inspection 6: Rear Main Signal and Rear Sub Signal MalfunctionNGS000EV
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.
Steering condition DATA MONITOR
Straight-ahead position – 3.5 - +3.5°
Turn wheel to the right by 90°Approx. R 90°
Turn wheel to the left by 90°Approx. R 90°
Self-diagnosis results
RR ST ANGLE SENSOR [MAIN SIGNAL] [C1915]
RR ST ANGLE SENSOR [SUB SIGNAL] [C1916]
RR ST ANGLE SENSOR [OFFSET SIG1] [C1917]
RR ST ANGLE SENSOR [OFFSET SIG2] [C1918]
RR ST ANGLE SENSOR [ABNORMAL VOL] [C1914]
DTC (warning lamp blinks)
24
25

TROUBLE DIAGNOSIS
STC-41
[RAS]
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STC
Revision: 2007 April2007 M35/M45
2. CHECK (1): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, and disconnect rear wheel steering angle sensor harness connector B465.
2. Check continuity rear wheel steering angle sensor harness con-
nector B465 and ground.
3. Turn ignition switch ON, and then check voltage rear wheel
steering angle sensor harness connector B465 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK (2): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.
2. Check continuity each harness connector of rear wheel steering
angle sensor harness connector B465 (A) and RAS control unit
harness connector B476 (B).
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> Harness between rear wheel steering angle sensor and
RAS control unit open or shorted. Repair or replace har-
ness. Terminal 3 − Ground : Continuity should exist.
SGIA1272E
Terminal 1 − Ground : Approx. 5 V
SGIA1273E
Rear wheel steering angle sensor RAS control unit Continuity
Terminal 1 Terminal 5 Yes
Terminal 3 Terminal 15 Yes
SGIA1650E

STC-42
[RAS]
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
4. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL
1. Connect rear wheel steering angle sensor harness connector B465.
2. Check voltage RAS control unit harness connector B476 when
starting the engine and turning the steering wheel from neutral
position clockwise/counterclockwise by 180°.
CAUTION:
There is approximately 1 V or more difference between main output and sub output at straight-ahead position, inspection
results are “NG”.
OK or NG
OK >> RAS control unit malfunction. Replace RAS control unit.
NG >> GO TO 5.
5. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B465 and RAS
control unit harness connector B476.
2. Check continuity between each harness connector of rear wheel
steering angle sensor harness connector B465 (A) and RAS
control unit harness connector B476 (B).
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.
SGIA1275E
Steering conditionRear wheel steering angle sensor
Rear main output
Terminal 4 (+) - 15 (-)Rear sub output
Terminal 7 (+) - 15 (-)
Straight-ahead (neutral position) Approx. 2.4 V Approx. 2.4 V
Turn wheel to the right by 180°Approx. 4.4 V Approx. 4.4 V
Turn wheel to the left by 180°Approx. 0.4 V Approx. 0.4 V
Rear wheel steering angle sensor RAS control unit Continuity
Terminal 2 Terminal 7 Yes
Terminal 4 Terminal 4 Yes
SGIA1651E

TROUBLE DIAGNOSIS
STC-43
[RAS]
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STC
Revision: 2007 April2007 M35/M45
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-24, "
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.
Self-diagnosis results
VDC [C1929]
DTC (warning lamp blinks)
26