Mitsubishi Grandis. Manual — part 939

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-81

Code No.C1505: Steering wheel sensor (signal seizure or abnormal neutral point)
Code No.C1506: Steering wheel sensor (steering sensor malfunction)

<LH drive vehicles>

IGNITION
SWITCH (IG1)

STEERING
WHEEL
SENSOR

COMBINATION
METER

ENGINE-ECU
<M/T>
OR
ENGINE-A/T-ECU
<A/T>

TCL/ASC-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

Steering Wheel Sensor Communication Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-82

<RH drive vehicles>

IGNITION
SWITCH (IG1)

STEERING
WHEEL
SENSOR

COMBINATION
METER

ENGINE-ECU
<M/T>
OR
ENGINE-A/T-ECU
<A/T>

TCL/ASC-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

Steering Wheel Sensor Communication Circuit

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-83

CAUTION

If there is any problem in the CAN bus lines, an
incorrect diagnosis code may be set. Prior to this
diagnosis, diagnose the CAN bus lines.

CAUTION

The steering wheel sensor-related diagnosis
code may be set when diagnosis code No.C1506
is set. Diagnose the steering wheel sensor first
when the steering wheel sensor-related
diagnosis code is set.

OPERATION

• The TCL/ASC-ECU and the steering wheel

sensor are connected each other via a CAN bus
line, and the sensor sends the steering wheel
angle and angular velocity information to the
ECU.

DIAGNOSIS CODE SET CONDITIONS

• These diagnosis codes will be set under the

cases below.

Code No.C1505: Steering Wheel Sensor (signal

seizure or abnormal neutral point)

• The steering wheel sensor output value does not

fluctuate for more than 60 seconds although the
vehicle speed is 50 km/h or more and the G and
yaw late sensor output value is fluctuating.

• The neutral point has been ±15 deg or more and

running more than 30 km with speed exceeds 10
km.

Code No.C1506: Steering Wheel Sensor (steering

sensor malfunction)

• The steering wheel sensor sets the diagnosis

code.

PROBABLE CAUSES

• Damaged wiring harness or connector

• Malfunction of the steering wheel sensor

• Malfunction of the hydraulic unit (integrated with

TCL/ASC-ECU)

• Incorrect installing of steering wheel sensor

DIAGNOSIS

STEP 1. MUT-III CAN bus diagnostics

CAUTION

Before connecting or disconnecting the MUT-III,
turn the ignition switch to the "LOCK" (OFF)
position.
(1) Connect MUT-III to the 16-pin diagnosis

connector.

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the CAN bus line (Refer to GROUP
54D, CAN bus line Diagnostic flow

P.54D-9

). Then go to Step 2.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-84

STEP 2. Check whether the diagnosis code is
reset.

CAUTION

Before connecting or disconnecting the MUT-III,
turn the ignition switch to the "LOCK" (OFF)
position.
(1) Turn the ignition switch to the "ON" position.
(2) Erase the diagnosis code.
(3) Turn the ignition switch to the "LOCK" (OFF)

position.

(4) Turn the ignition switch to the "ON" position.
(5) Check if the diagnosis code is set.
(6) Turn the ignition switch to the "LOCK" (OFF)

position.

Q: Is code No.C1505 or C1506 set?

YES <C1505 is set> :

Go to Step 3.

YES <C1506 is set> :

Check the steering wheel

sensor diagnosis code, and diagnose the
diagnosis code (Refer to

P.35C-118

).

NO :

The procedure is complete.

STEP 3. MUT-III data list

CAUTION

Before connecting or disconnecting the MUT-III,
turn the ignition switch to the "LOCK" (OFF)
position.
(1) Connect MUT-III to the 16-pin diagnosis

connector.

(2) Turn the ignition switch to the "ON" position.
(3) Set MUT-III to data reading mode.

• Item 32: Steering angle

OK: Correct angle is displayed as the
steering wheel is turned.

Q: Is the check result normal?

YES :

Go to step 6.

NO :

Align the steering wheel sensor neutral
point and carry out calibration (Refer to

P.35C-168

). Then go to Step 4.

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824

AC302297

AC310120

AB

MB991827

16-pin

MB991910

MB991824