Mitsubishi 380. Manual - part 329

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-36

DATA LIST REFERENCE TABLE

M1136003500071

NOTE: If the ABS-8 ECU or the active wheel 
speed sensor are disconnected, or if the wiring 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 oper-
ate normally. To restore the power supply, the 
ignition switch must be turned to the "OFF" posi-
tion then to the "ON" position again.

The following items can be read by the diagnostic 
tool from the ABS/TCL-ECU input data. (Refer to 

P.13C-3

).

NOTE: Since the TCL is controlled with the same ABS/TCL-ECU used to control the ABS, the stoplight switch 
check item (No.6) used only for the ABS also appear.

MUT-III 
DIAGNOSTI
C TOOL 
DISPLAY

ITEM 
NO.

CHECK ITEM

CHECKING REQUIREMENTS

NORMAL 
VALUE

FL wheel 
speed sensor

01

Front left wheel speed sensor

Drive the vehicle

Vehicle speeds 
displayed on the 
speedometer 
and diagnostic 
tool are identical.

FR wheel 
speed sensor

02

Front right wheel speed sensor

RL wheel 
speed sensor

03

Rear left wheel speed sensor

RR wheel 
speed sensor

04

Rear right left wheel speed 
sensor

Power supply 
voltage

05

ABS/TCL-ECU power supply 
voltage

Ignition switch power supply 
voltage

Battery positive 
voltage

Stoplamp 
switch 
(input)*

06

Stoplamp switch

Depress the brake pedal.

ON

Release the brake pedal.

OFF

Stoplamp 
switch*

13

Stoplamp switch

Depress the brake pedal.

ON

Release the brake pedal.

OFF

Pump motor

21

Pump motor

When the ABS outputs the 
operation permission signal 
during driving

ON

When the ABS outputs the 
operation permission signal 
during driving

OFF

Valve relay

30

Valve relay

When the ABS outputs the 
operation permission signal 
during driving

ON

When the ABS outputs the 
operation permission signal 
during driving

OFF

TCL mode

35

TCL operation

When the TCL outputs the 
operation permission signal 
during driving

ON

When the TCL outputs the 
operation inhibition signal 
during driving

OFF

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-37

ACTUATOR TEST REFERENCE TABLE

M1136003600067

NOTE: If the ABS-8 ECU or the active wheel 
speed sensor are disconnected, or if the wiring 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 oper-
ate normally. To restore the power supply, the 
ignition switch must be turned to the "OFF" posi-
tion then to the "ON" position again.

The diagnostic tool activates the following actuators 
for testing. (Refer to 

P.13C-3

).

NOTE: Since the TCL is controlled with the same ABS/TCL-ECU used to control the ABS, the FL, FR, RL or 
RR Wheel ABS Drive testing items (No.01 to 04) used only for the ABS also appear.

MUT-III 
DIAGNOSTIC TOOL 
DISPLAY

ITEM NO.

CHECK ITEM

PARTS TO BE ACTIVATED

FL wheel ABS Drive* 01

Solenoid valve for front left wheel

Solenoid valves and pump 
motors in the hydraulic unit 
(simple inspection mode)

FR wheel ABS Drive* 02

Solenoid valve for front right wheel

RL wheel ABS Drive* 03

Solenoid valve for rear left wheel

RR wheel ABS 
Drive*

04

Solenoid valve for rear right wheel

Engine TCL Drive

09

TCL operation check

Outputs the engine torque 
control signal (engine torque = 
0) to PCM for three seconds.

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-38

CHECK AT ABS/TCL-ECU CONNECTOR: A-02 
RESISTANCE AND TERMINAL VOLTAGE

M1136003800072

RESISTANCE AND TERMINAL VOLTAGE CHECK 
CHART

.

Required Special Tools:
MB991219: Inspection Test Harness
MB991223: Harness Set
1. Disconnect the ABS/TCL-ECU connector A-02.

2. Measure the resistance and terminal voltage at the 

ABS/TCL-ECU wiring harness-side connector A-02 using 
the Inspection test harness MB991219 (by inserting probe) 
between terminals shown in the table below and body 
ground.

NOTE: The special tool (Inspection test harness) MB991219 
for connector pin contact pressure should be used. The test 
probe should never be forcibly inserted, as it may cause a 
defective contact.

3. The terminal layouts are shown in the illustrations below.

16DB402A

A-02 (GR)

CONNECTOR: A-02 

A-02 HARNESS CONNECTOR:

CONNECTOR 
TERMINAL NO

SIGNAL

CHECKING REQUIREMENT

NORMAL 
CONDITION

21

TCL switch

Ignition 
switch: "ON" 

When the TCL switch is not 
pressed.

More than 2 ohms 
(open circuit)

When the TCL switch is 
pressed.

Less than 2 ohms

18

ABS/TCL-ECU power 
supply

Ignition switch: "ON" 

Battery positive 
voltage

Ignition switch: "START"

1 V or less

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TRACTION CONTROL SYSTEM (TCL)

13C-39

RESISTANCE AND CONTINUITY BETWEEN 
ABS-ECU AND WHEEL SPEED SENSOR 
HARNESS-SIDE CONNECTOR TERMINALS

.

Required Special Tools:
MB991219: Inspection Test Harness
MB991223: Harness Set

1. Disconnect the ABS/TCL-ECU connector A-02 and the 

related wheel speed sensor connector,  then turn the ignition 
switch to the "LOCK" (OFF) position.

2. Measure the resistance and continuity between the 

ABS/TCL-ECU wiring harness-side connector A-02 and the 
Wheel Speed Sensor connectors using the Inspection test 
harness MB991219 (by inserting probe) and an ohmmeter 
between terminals shown in the table below.

NOTE: The special tool (Inspection test harness) MB991219 
for connector pin contact pressure should be used. The test 
probe should never be forcibly inserted, as it may cause a 
defective contact.

3. The terminal layout is shown in the table below.

ABS-ECU
 CONNECTOR
 (A-02)

Supply

Signal

WHEEL SPEED
    SENSOR

Wheel speed 
sensor connectors:
A-04,  A-01,  D-31,  D-30

Terminals:
 5, 10, 17, 19

35DB123A

Terminals:
 16, 9, 6, 8