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
).
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
).
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
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