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