Mitsubishi 380. Manual — part 320

MAINTENANCE SERVICE

GENERAL

00-58

20. TYRES (ROTATE)

M1001008900303

Rotate tyres regularly to equalize tyre wear and help extend
tyre life. Recommended tyre rotation is every 12,000 km under
normal driving conditions and every 9,600 km in severe driving
conditions.
Timing for the rotation may vary according to vehicle condition,
road surface conditions, and individual driver's habits.
When rotating tyres, check for uneven wear, damage, and
wheel alignment. Abnormal wear is usually caused by incorrect
tyre pressure, improper wheel alignment, out-of balance
wheels, or severe braking.
The first rotation is the most important, to achieve more uniform
wear for all tyres on the vehicle.

AC000120

13C-1

GROUP 13C

TRACTION

CONTROL SYSTEM

(TCL)

CONTENTS

GENERAL DESCRIPTION. . . . . . . . .

13C-2

TRACTION CONTROL SYSTEM (TCL)
DIAGNOSIS . . . . . . . . . . . . . . . . . . . .

13C-3

INTRODUCTION TO TRACTION CONTROL
SYSTEM (TCL) DIAGNOSIS . . . . . . . . . . .

13C-3

TROUBLESHOOTING STRATEGY . . . . . .

13C-3

DIAGNOSIS FUNCTION. . . . . . . . . . . . . . .

13C-3

DIAGNOSTIC TROUBLE CODE CHART . .

13C-8

DIAGNOSTIC TROUBLE CODE
PROCEDURES. . . . . . . . . . . . . . . . . . . . . .

13C-10

SYMPTOM CHART. . . . . . . . . . . . . . . . . . .

13C-23

SYMPTOM PROCEDURES . . . . . . . . . . . .

13C-23

DATA LIST REFERENCE TABLE . . . . . . .

13C-36

ACTUATOR TEST REFERENCE TABLE. .

13C-37

CHECK AT ABS/TCL-ECU RESISTANCE
AND TERMINAL VOLTAGE . . . . . . . . . . . .

13C-38

RESISTANCE AND CONTINUITY
BETWEEN ABS-ECU AND WHEEL SPEED
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . .

13C-39

VOLTAGE AND SIGNAL CHECK AT
ABS-ECU USING AN OSCILLOSCOPE . . .

13C-41

SPECIAL TOOLS . . . . . . . . . . . . . . . .

13C-45

ON-VEHICLE SERVICE . . . . . . . . . . .

13C-47

TCL INDICATOR LIGHT CHECK . . . . . . . .

13C-47

TCL OPERATION CHECK . . . . . . . . . . . . .

13C-47

TCL SWITCH CHECK . . . . . . . . . . . . . . . . .

13C-48

WHEEL SPEED SENSOR CHECK . . . . . . .

13C-48

TCL SWITCH . . . . . . . . . . . . . . . . . . .

13C-49

REMOVAL AND INSTALLATION . . . . . . . .

13C-49

WHEEL SPEED SENSOR . . . . . . . . .

13C-49

REMOVAL AND INSTALLATION . . . . . . . .

13C-49

ABS/TCL-ECU . . . . . . . . . . . . . . . . . .

13C-49

REMOVAL AND INSTALLATION . . . . . . . .

13C-49

HOME

GENERAL DESCRIPTION

TRACTION CONTROL SYSTEM (TCL)

13C-2

GENERAL DESCRIPTION

M1136000100029

Traction Control systems are a significant safety fea-
ture designed to prevent wheel spin during accelera-
tion. This results in improved vehicle stability and
steer ability. When excessive wheel spin is detected,
the system will automatically reduce engine torque
via the engine management system. The Engine
ECU can reduce throttle position, cut fuel injection
and retard ignition to one or more cylinders depend-

ing on how much torque reduction is required and
will continue to occur until the wheels are no longer
spinning. During traction control operation the TCL
warning lamp will flash to inform the driver that the
vehicle is under traction control. This will continue
until traction control is finished.

CONSTRUCTION DIAGRAM

03DB140A

9 10 11 12 13 14 15 16

1 2 3 4 5 6 7 8

WHEEL SPEED SENSOR

ENGINE

ECU

HYDRAULIC UNIT

ASSEMBLY

(BUILT-IN ABS/TCL-ECU)

DATA LINK

CONNECTOR

WHEEL SPEED SENSOR

WHEEL SPEED SENSOR

WHEEL SPEED

SENSOR

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-3

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

INTRODUCTION TO TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

M1136004600026

TCL Diagnostic Trouble Code Detection
Conditions

TCL diagnostic trouble codes (TCL DTCs) are set
under different conditions, depending on the mal-
function detected. Most TCL DTCs will only be set
during vehicle operation. Some TCL DTCs will also
be set during the TCL self-check immediately after
the engine is started. When you check if an TCL DTC

will be displayed again after the DTC has been
erased, you should recreate the TCL DTC set condi-
tions. Depending on the detection timing and set
conditions for the specific TCL DTC, you must either
drive the vehicle or turn the engine off and restart it.
To set the proper conditions for that DTC again, refer
to "TCL DTC SET CONDITIONS" for each TCL DTC
that you are trying to reset.

TROUBLESHOOTING STRATEGY

M1136003100062

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will check most of the
possible causes of a TCL problem.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any TCL DTC. (Refer to

P.13C-3

, Diagnosis Function

− How to Read and

Erase Diagnostic Trouble Codes).

4. If you can verify the condition but no TCL DTCs

are set, and the malfunction may be intermittent.
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How

to Cope with Intermittent Malfunctions

P.00-14

).

5. If you can verify the condition but there is no TCL

DTCs, or the system cannot communicate with
diagnostic tool MB991958 (MUT-III sub
assembly), and find the fault. (Refer to

P.13C-23

,

Symptom Chart).

6. If there is a TCL DTC, record the number of the

code, then erase the code from vehicle memory
using the diagnostic tool MB991958 (MUT-III sub
assembly). (Refer to

P.13C-3

, Diagnosis Function

− How to Read and Erase Diagnostic Trouble
Codes).

7. Re-create the TCL DTC set conditions to see if

the same TCL DTC will set again. (Refer to

P.13C-3

, Diagnosis Function

− How to Read and

Erase Diagnostic Trouble Codes).

• If the same TCL DTC sets again, perform the

diagnostic procedures for the set code. (Refer to

P.13C-8

, Diagnostic Trouble Code Chart).

NOTE: If the ABS-8 ECU or the active wheel

speed sensor are disconnected, or if the wir-
ing is an open/ short circuit, the ABS 8 ECU
will shut off power supply to the respective
wheel speed sensor. All other wheel speed
sensors will operate normally. To restore the
power supply, the ignition switch must be
turned to the "OFF" position then to the "ON"
position again.

DIAGNOSIS FUNCTION

M1136003200025

HOW TO CONNECT THE DIAGNOSTIC TOOL
(MUT-III)

Required Special Tools:

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A