2006 INFINITI M35 sensor

STC-28
[RAS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
CONSULT-II Function (RAS)NGS000EG
FUNCTION
CONSULT-II can display each self-diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-39, "CONSULT-II Start Procedure" .
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-39, "CONSULT-II Start Procedure" .
2. Touch “PRINT” to print out the self-diagnostic results if necessary. Check RAS warning lamp if “NO FAIL-
URE” is displayed.
3. Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component. Refer to STC-28, "
Display Item List" .
Display Item List
CAUTION:
When malfunctions are detected in several systems, including the “CAN COMM [U1000]” and
“CONTROL_UNIT (CAN) [U1010]”, inspect the CAN communication system.
Mode Function Reference
SELF-DIAG RESULTSReceives self-diagnosis results from RAS control unit and
indicates DTCs.STC-28, "
SELF-DIAG RESULT
MODE"
DATA MONITORReceives input/output signals from RAS control unit and
indicates and stores them to facilitate locating cause of
malfunctions.STC-30, "DATA MONITOR MODE"
CAN DIAG SUPPORT MNTRMonitors transmitting/receiving status of CAN communi-
cation.STC-31, "CAN Communication"
ACTIVE TESTSends command to RAS actuator to change output sig-
nals and check operation of output system.STC-30, "ACTIVE TEST MODE"
ECU PART NUMBER Displays RAS control unit part number.STC-30, "RAS CONTROL UNIT
PART NUMBER"
DTC code Diagnostic item Diagnostic item is detected when... Check items
C1923 STEERING_ANGLE_SEN [NO_CHANGE] (ꞏ a)While driving at 60 km/h (37 MPH)
or more, steering angle does not
change for a while.STC-38
C1924 STEERING_ANGLE_SEN [NO_NEUT_STATE] (ꞏ b)When driving some distance, no
neutral signal (ON signal) is input.STC-38
C1915 RR_ST_ANGLE_SENSOR [MAIN_SIGNAL] (ꞏ a)The main sensor input signal is
malfunctioning for some time
against the sensor power supply
value.STC-40
C1916 RR_ST_ANGLE_SENSOR [SUB_SIGNAL] (ꞏ b)When the main sensor input signal
is 2.4 - 2.6 V, the sub sensor input
signal is malfunctioning for some
time compared to the sensor power
supply value.STC-40
C1917, C1918 RR_ST_ANGLE_SENSOR [OFFSET_SIG1,2] (ꞏ c)An excessive difference has
occurred in the input values of main
sensor and sub sensor.STC-40
C1914 RR_ST_ANGLE_SENSOR [ABNORMAL_VOL] (ꞏ d)Higher or lower value compared to
the standard voltage.STC-40
C1921 MOTOR_OUTPUTNo engine speed is input for a cer-
tain time.STC-43
C1911 MOTOR_VOLTAGE [LOW_VOLTAGE] (ꞏ a)The motor power supply voltage is
lower than ignition power supply
voltage with RAS motor relay ON.STC-35

TROUBLE DIAGNOSIS
STC-29
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2006 January2006 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.
C1912 MOTOR_VOLTAGE [BAD_OBSTRCT] (ꞏ b)The motor power supply voltage is
inputting for some time with motor
power supply OFF by RAS control
unit.STC-35
C1913 MOTOR_OUTPUT [ABNORMAL_SIG] (ꞏ a)When the motor current value is
10A or more, actual output is
excessively low and the condition
continues for some time.STC-37
C1902 MOTOR_OUTPUT [REV_CURRENT] (ꞏ c)The current flows in the opposite
direction when the motor current is
output. STC-37
C1903 MOTOR_OUTPUT [NO_CURRENT] (ꞏ d)The current flows when the motor
current is not output. STC-37
C1904 MOTOR_OUTPUT [OVERCURRENT] (ꞏ e)The excessive high current flows
when the motor current is output.STC-37
C1910 MOTOR_OUTPUT [MOTOR_LOCK] (ꞏ b)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 - 9] Control unit malfunctionSTC-35
C1901
C1905
C1906
C1907
C1908
C1909
C1922
C1928
C1920 STEERING_ANGLE_SEN [NO_SIGNAL]No steering angle signal is input for
some time.STC-38
C1926 STEERING_ANGLE_SEN
An unexpected signal is input.
Steering angle sensor outputs the
malfunction signal.STC-38
C1929 VDCABS actuator and electric unit (con-
trol unit) outputs the malfunction
signal.STC-42
U1000 CAN COMM CIRCUITWhen a control unit (except for
RAS) is not transmitting or receiving
CAN communication signal 2 sec-
onds or less.STC-43
U1010 CONTROL_UNIT [CAN]When detected error during the ini-
tial diagnosis of CAN controller of
each control unit.STC-43
DTC code Diagnostic item Diagnostic item is detected when... Check items

STC-30
[RAS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-39, "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-39, "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-39, "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) 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 dis-
played.
RR ST ANG_MAI (V) Rear wheel steering angle main sensor output voltage is displayed.
RR ST ANG_SUB (V) Rear wheel 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

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-38
[RAS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Inspection 4: Vehicle Speed SignalNGS000ET
1. CHECK SPEEDOMETER
Start the engine, and then check the combination meter (speed meter) operation.
Does it operate normally?
YES >> GO TO 2.
NO >> Combination meter. Refer to DI-5, "
COMBINATION METERS" .
2. CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector, and check terminal for deforma-
tion, 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 >> RAS control unit malfunction. Replace RAS control unit.
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
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.
Self-diagnosis results
VEHICLE_SPEED_SEN [NO_SIGNAL]
DTC (warning lamp blinks)
21
Self-diagnosis results
STEERING_ANGLE_SEN [NO_CHANGE] (ꞏ a)
STEERING_ANGLE_SEN [NO_NEUT_STATE] (ꞏ b)
STEERING_ANGLE_SEN [NO_SIGNAL]
STEERING_ANGLE_SEN
DTC (warning lamp blinks)
22

TROUBLE DIAGNOSIS
STC-39
[RAS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: 2006 January2006 M35/M45
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.
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" .
Steering angle sensor Ground Continuity
Te r m i n a l 2 — Ye s
SGIA1270E
Steering angle sensor Ground Continuity
Terminal 3 — Battery voltage (approx. 12V)
SGIA1271E
Steering condition DATA MONITOR
Straight-ahead position – 3.5 - +3.5
Turn wheel to the right by 90Approx. R 90
Turn wheel to the left by 90Approx. R 90

STC-40
[RAS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
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.
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 B104.
2. Check continuity rear wheel steering angle sensor harness con-
nector B104 and ground.
3. Turn ignition switch ON, and then check voltage rear wheel
steering angle sensor harness connector B104 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
Self-diagnosis results
RR_ST_ANGLE_SENSOR [MAIN_SIGNAL] (ꞏ a)
RR_ST_ANGLE_SENSOR [SUB_SIGNAL] (ꞏ b)
RR_ST_ANGLE_SENSOR [OFFSET_SIG 1, 2] (ꞏ c)
RR_ST_ANGLE_SENSOR [ABNORMAL_VOL] (ꞏ d)
DTC (warning lamp blinks)
24
25
Terminal 3 Ground : Continuity exist.
SGIA1272E
Terminal 1 Ground : Approx. 5 V
SGIA1273E

TROUBLE DIAGNOSIS
STC-41
[RAS]
C
D
E
F
H
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MA
B
STC
Revision: 2006 January2006 M35/M45
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 B104 and RAS
control unit harness connector B127.
2. Check continuity each harness connector of rear wheel steering
angle sensor harness connector B 104 and RAS control unit
harness connector B127.
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 harness.
4. CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL
1. Connect rear wheel steering angle sensor harness connector B104.
2. Check voltage RAS control unit harness connector B127 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.
SGIA1274E
Rear wheel steering angle sensor RAS control unit Continuity
Terminal 1 Terminal 5 Yes
Te r m i n a l 3 Te r m i n a l 1 5 Ye s
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