Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 582

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-19

CIRCUIT OPERATION

•

The ON signal when the brake pedal is pressed
or the OFF signal when the brake pedal is
released is input to the ABS-ECU (terminal 14).

ABS DTC SET CONDITION
Output is provided in the following cases:

•

Stoplight switch is not operating properly and
remains in ON state for more than 15 minutes.

•

Stoplight switch system harness is damaged and
no signal is input to ABS-ECU.

TROUBLESHOOTING HINTS (The most likely
causes for this DTC is to set are:)

•

Malfunction of the stoplight switch

•

Damaged wiring harness or connector

•

Malfunction of the hydraulic unit (integrated with
ABS-ECU)

DIAGNOSIS

Required Special Tools:

•

MB991223: Harness Set

•

MB991502: Scan Tool (MUT-II)

•

MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the stoplight operation.

Q: Does the stoplight light or go out correctly?

YES : Go to Step 3.
NO : Go to Step 2.

AC001985

CONNECTOR: A-02

AD

AC004421AB

CONNECTORS: C-03, C-06

C-03

C-06

COMBINATION METER

AC004409AB

CONNECTOR: C-89

AC004412 AB

CONNECTOR: C-107

AC004414AB

CONNECTOR: C-110

AC004424AB

FUSIBLE LINK (2)

BATTERY

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-20

STEP 2. Check the stoplight switch installation condition.

Q: Is the stoplight switch installed properly?

YES : Go to Step 4.
NO : Install it correctly and then go to Step 7.

STEP 3. Check the stoplight switch circuit at the ABS-ECU
connector A-02.
(1)Disconnect the ABS-ECU connector A-02 and measure at

the harness side.

(2)Press the brake pedal. (The stoplight switch is turned to

ON.)

(3)Measure the voltage between terminal 14 and ground.

Q: Is the voltage approximately 12 volts (battery positive

voltage)?
YES : Replace the hydraulic unit (integrated with ABS-ECU)

and then go to Step 7.

NO : Go to Step 5.

STEP 4. Check the stoplight switch continuity.
(1)Remove the stoplight switch. (Refer to GROUP 35A, Brake

Pedal

P.35A-31

.)

(2)Connect an ohmmeter to the stoplight switch terminals 1

and 2, and check whether there is continuity when the
plunger of the stoplight switch is pushed in and when it is
released.

(3)The stoplight switch is in good condition if there is no

continuity when the plunger is pushed in to a depth of within
4 mm (0.2 inch) from the outer case edge surface, and if
there is continuity when it is released.

Q: Is the stoplight switch damaged?

YES : Replace it and then go to Step 7.
NO : Go to Step 6.

AC000942

A-02 (HARNESS SIDE)

AB

AC002295 AB

AC000943 AB

NO CONTINUITY
(OFF)

CONTINUITY
(ON)

4 mm (0.2 in)

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-21

STEP 5. Check the harness wire between the ABS-ECU
connector A-02 and the stoplight switch connector C-03.
NOTE: After inspecting the intermediate connector C-06,
inspect the wire. If the intermediate connector C-06 is
damaged, repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection

P.00E-2

. If the connector has been

repaired or replaced, go to Step 7.

Q: Is the harness wire between the ABS-ECU connector A-

02 and the stoplight switch connector C-03 damaged?
YES : Repair it and then go to Step 7.
NO : No action is to be taken.

AC001985

CONNECTOR: A-02

AD

AC004421AB

CONNECTORS: C-03, C-06

C-03

C-06

COMBINATION METER

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-22

STEP 6. Check the harness wire between fusible link
number 2 and stoplight switch connector C-03.
NOTE: After inspecting the intermediate connector C-89, C-
107, or C-110, inspect the wire. If the intermediate connector C-
89, C-107, or C-110 is damaged, repair or replace it. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

. If the

connector has been repaired or replaced, go to Step 7.

Q: Is the harness wire between the fusible link number 2

and the stoplight switch connector C-03 damaged?
YES : Repair it and then go to Step 7.
NO : Check and repair the harness wire between stoplight

switch and stoplight. Then go to Step 7.

AC001989

COMBINATION
METER

CONNECTOR: C-03

AR

AC004409AB

CONNECTOR: C-89

AC004412 AB

CONNECTOR: C-107

AC004414AB

CONNECTOR: C-110