Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 600

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

TSB Revision

TRACTION CONTROL SYSTEM (TCL)

35C-35

INSPECTION PROCEDURE 6: The TCL System does not Operate.

TECHNICAL DESCRIPTION (COMMENT)
The cause depends on driving and road surface
conditions, so diagnosis may be difficult. However, if
no diagnostic trouble code is displayed, carry out the
following inspection.

TROUBLESHOOTING HINTS (The most likely
cause for this case:)
Malfunction of the hydraulic unit

DIAGNOSIS
Check the hydraulic unit (Refer to

P.35C-39

.). If the hydraulic

unit (integrated with ABS-ECU) is malfunctioning, replace it.
Then check that the malfunction symptom is eliminated.

DATA LIST REFERENCE TABLE

M1354003000043

The following items can be read by the scan tool
from the ABS-ECU input data.

ACTUATOR TEST REFERENCE TABLE

M1354003100040

The scan tool activates the following actuators for
testing.

NOTE: If the ABS-ECU is inoperative, actuator
testing cannot be carried out.

NOTE: Actuator testing is only possible when the
vehicle is stationary. If the vehicle speed during
actuator testing exceeds 10 km/h (6 mph), forced
actuation will be canceled.

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

CHECK ITEM

CHECKING REQUIREMENTS NORMAL VALUE

BATT.
VOLTAGE

16

ABS-ECU power supply voltage Ignition switch power supply

voltage and valve monitor
voltage

9

−

16 V

FL SNSR

12

Front-left wheel speed sensor

Drive the vehicle

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

FR SNSR

11

Front-right wheel speed sensor

RL SNSR

14

Rear-left wheel speed sensor

RR SNSR

13

Rear-right wheel speed sensor

STOPLIGH
T SW

36

Stoplight switch

Depress the brake pedal.

ON

Release the brake pedal.

OFF

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

35C-36

ACTUATOR TEST SPECIFICATIONS

CHECK AT ABS-ECU

M1354003200047

TERMINAL VOLTAGE CHECK CHART
1. Measure the voltages between terminals (16),

(19) and (30) (ground terminals) and each
respective terminal.

2. The terminal layouts are shown in the illustration

below.

NOTE: Do not measure terminal voltage for
approximately three seconds after the ignition
switch is turned to "ON." The ABS-ECU performs
the initial check during that period.

NO.

ITEM

PARTS TO BE
ACTIVATED

01

ABS solenoid valve for
front-left wheel

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

02

ABS solenoid valve for
front-right wheel

03

ABS solenoid valve for
rear-left wheel

04

ABS solenoid valve for
rear-right wheel

06

TCL solenoid valve for
front-right wheel

TCL valves and pump
motor in the hydraulic unit
(simple inspection mode)

07

TCL solenoid valve for
front-left wheel

12

Pump motor

Activate the pump motor
for two seconds.

AC000971AB

ACTIVATION PATTERN (NO.06,07)

A

B

C

TCL
SOLENOID
VALVE

END OF
FORCED
ACTION

START OF
FORCED
ACTION

1 s

2 s

PUMP
MOTOR

ON

OFF

NOTE
A:
B:
C:

HYDRAULIC PRESSURE DECREASES
HYDRAULIC PRESSURE HOLDS
HYDRAULIC PRESSURE INCREASES

AC002089 AB

CONNECTOR
TERMINAL NO.

SIGNAL

CHECKING REQUIREMENT

NORMAL CONDITION

14

Input from stoplight
switch

Stoplight switch: ON

System voltage

Stoplight switch: OFF

Approximately 0 V

15

ABS-ECU power supply

Ignition switch: "ON"

System voltage

17

Motor power supply

Always

System voltage

18

Solenoid valve power
supply

Always

System voltage

TRACTION CONTROL SYSTEM (TCL) DIAGNOSIS

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TRACTION CONTROL SYSTEM (TCL)

35C-37

RESISTANCE AND CONTINUITY BETWEEN
HARNESS-SIDE CONNECTOR TERMINALS
1. Turn the ignition switch to the "LOCK" (OFF)

position and disconnect the ABS-ECU connectors
before checking resistance and continuity.

2. Check between the terminals indicated in the

table below.

3. The terminal layouts are shown in the illustration

below.

AC002090 AB

CONNECTOR TERMINAL NO.

SIGNAL

NORMAL CONDITION

6

−

7

Front-left wheel speed sensor

1.28

−

1.92 k

Ω

1

−

3

Rear-right wheel speed sensor

1.28

−

1.92 k

Ω

4

−

5

Front-right wheel speed sensor

1.28

−

1.92 k

Ω

8

−

9Rear-left wheel speed sensor

1.28

−

1.92 k

Ω

16

−

body ground

Solenoid valve ground

Less than 2

Ω

19

−

body ground

Motor ground

Less than 2

Ω

30

−

body ground

TCL solenoid valve ground

Less than 2

Ω

SPECIAL TOOLS

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TRACTION CONTROL SYSTEM (TCL)

35C-38

SPECIA L TO O LS

M1354000200037

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991502
Scan tool (MUT-II)

MB991496-OD

For checking of TCL
(Diagnostic trouble code
display when using the
scan tool)

MB991529
Diagnostic trouble code
check harness

Tool not necessary if scan
tool (MUT-II) is available.

For checking of TCL
(Diagnostic trouble code
display when using the
TCL warning light)

MB991223
Harness set
A:MB991219
Inspection harness
B:MB991220
LED harness
C:MB991221
LED harness adaptor
D:MB991222
Probe

MB991223
MB991709-01

Making voltage and
resistance measurement
during troubleshooting
A: Connector pin contact
B: Power circuit
inspection
C: Power circuit
inspection
D: Commercial tester
connection

B991502

MB991529

MB991223

A

AB

B

C

D