Mitsubishi Grandis. Manual — part 920

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-5

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING

M1355000900028

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-5

.

NOTES WITH REGARD TO DIAGNOSIS

M1355009500016

1. The TCL/ASC is a system which controls the

brake pressure and engine power by means of
the operation of the ECU. Accordingly, the
following symptoms may occur at times, but these
are a sign of normal TCL/ASC operation, and do
not indicate a malfunction.

2. For road surfaces such as snow-covered roads

and gravel roads, the braking distance for
vehicles with ABS can sometimes be longer than
that for other vehicles. Accordingly, advise the
customer to drive safely on such roads by
lowering the vehicle speed and not being too
overconfident.

3. Diagnosis detection condition can vary depending

on the diagnosis code. Make sure that checking
requirements listed in the "Comment" are satisfied
when checking the trouble symptom again.

Phenomenon

Explanation of phenomenon

When the engine starts, a knocking sound can be heard coming
from the engine compartment.

This sound occurs as a result of system
operation checking, and is not a
malfunction.

• Sound of the motor inside the ABS hydraulic unit operation.

(whine)

• Sound is the generated along with vibration of the brake

pedal. (scraping)

• When TCL/ASC operates, sound is generated from the

vehicle chassis due to repeated brake application and
release. (Thump: suspension; squeak: tyres)

This is the sound of normal system
operation, and is not a malfunction.

Shocks are felt if the brake pedal is depressed when driving at
low speed.

This is due to system operation checking
(starting-of check when the vehicle speed
reaches a certain number of km/h) and is
not a malfunction.

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-6

TCL/ASC INDICATOR LAMP, TCL OFF
INDICATOR LAMP, BRAKE WARNING
LAMP INSPECTION

M1355009600013

Check that the TCL/ASC indicator lamp, TCL OFF
indicator lamp and brake warning lamp illuminates as
follows.
1. When the ignition switch is turned to the "ON"

position, the TCL/ASC indicator lamp, TCL OFF
indicator lamp and brake warning lamp illuminates
for approximately 3 seconds and then switches
off.

2. When the voltage is restored by operating the

starter motor, the TCL/ASC indicator lamp and the
TCL OFF indicator lamp may illuminate.

3. If the illumination is other than the above, check

the diagnosis codes.

NOTE: For more information about warning lamp,
refer to GROUP 35B

P.35B-7

.

DIAGNOSTIC FUNCTION

M1355001000028

HOW TO READ DIAGNOSIS CODE

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

read diagnosis code

P.00-5

.

ERASING DIAGNOSIS CODE

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

read diagnosis code

P.00-5

.

DIAGNOSIS CODE CHART

M1355001100036

CAUTION

During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s)
disconnected. On completion, confirm all
systems for diagnosis code(s). If diagnosis
code(s) are set, erase them all.
Follow the inspection chart that is appropriate for the
diagnosis code.

<ABS/TCL/ASC DIAGNOSIS CODE>

AC313541AB

Approx. 3 s

A,B
and C
lamp

Ignition
switch

Illuminated

Not
illuminated

START

ON

ACC

A

B

C

Traction control-OFF indicator lamp

Traction control/Active stability control
indicator lamp

Brake warning lamp

B

A

C

:

:

:

Diagnosis code
No.

Inspection item

Diagnostic content

Reference page

C1200

Front right wheel speed sensor Open circuit or short circuit

P.35C-9

C1205

Front left wheel speed sensor

C1210

Rear right wheel speed sensor

C1215

Rear left wheel speed sensor

C1201

Front right wheel speed sensor

P.35C-23

C1206

Front left wheel speed sensor

C1211

Rear right wheel speed sensor

C1216

Rear left wheel speed sensor

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-7

C1226

Control solenoid valve (FR) pressure holding system

P.35C-36

C1231

Control solenoid valve (FR) decompressing system

C1236

Control solenoid valve (FL) pressure holding system

C1241

Control solenoid valve (FL) pressure reducing system

C1246

Control solenoid valve (RR) pressure holding system

C1251

Control solenoid valve (RR) pressure reducing system

C1256

Control solenoid valve (RL) pressure holding system

C1261

Control solenoid valve (RL) decompressing system

C1271

Motor system

P.35C-42

C1276

Valve relay system

P.35C-47

C1300

Front-right cut valve (Primary)

P.35C-36

C1305

Front-right suction valve (Primary)

P.35C-36

C1310

Front-left cut valve (secondly)

P.35C-36

C1315

Front-left suction valve (secondly)

P.35C-36

C1340

Abnormal stop lamp switch signal

P.35C-52

C1361

Abnormal pressure sensor characteristics

P.35C-60

C1364

Pressure sensor malfunction

P.35C-60

C1366

Lateral G sensor signal malfunction

P.35C-62

C1371

Yaw late sensor signal malfunction

P.35C-62

C1377

Combination sensor communication abnormality

P.35C-72

C1505

Steering wheel sensor abnormality (detected at
TCL/ASC-ECU-side)

P.35C-81

C1506

Steering wheel sensor abnormality (self-detection at steering
wheel sensor-side)

P.35C-81

C1607

TCL/ASC-ECU failure

P.35C-86

C1640

Improperly installed TCL/ASC-ECU

P.35C-87

C1860

High voltage at TCL/ASC-ECU power supply (18.0

±1.0V or

more)

P.35C-89

C1861

Low voltage at TCL/ASC-ECU power supply (9.7

±0.3V or

less, 8.0

±0.5V or more)

P.35C-89

TCL/ASC-ECU power supply low voltage (8.0

±0.5 V or below)

<when vehicle stopped>

C1864

Combination sensor power supply abnormality

P.35C-96

U1073

Bus-off

P.35C-104

U1100

Engine-related CAN Timeout error

P.35C-106

U1101*

A/T-related CAN Timeout error

P.35C-109

U1104

Steering wheel sensor CAN Timeout error

P.35C-112

U1120

Engine malfunction detected

P.35C-114

Diagnosis code
No.

Inspection item

Diagnostic content

Reference page

TROUBLESHOOTING

TRACTION CONTROL/ACTIVE STABILITY CONTROL SYSTEM

35C-8

<STEERING WHEEL SENSOR DIAGNOSIS CODE>

*: Vehicles with A/T only

Diagnosis code
No.

Inspection item

Reference page

C1551

Improper output voltage of steering wheel sensor

P.35C-118

C1552

Abnormal steering wheel sensor output pattern

P.35C-118

C1553

Abnormal optical sensor output pattern

P.35C-118

C1554

Steering wheel sensor speed is out of range

P.35C-118

C1555

Steering wheel sensor out of range

P.35C-118

C1608

EEPROM failure

P.35C-118

U1073

Bus-off

P.35C-119