Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 584

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-27

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication between the Scan Tool and ABS-ECU Is not Possible.

NOTE: CONNECTOR LOCK SWITCH
ON: The ABS-ECU connector A-02 is connected.
OFF: The ABS-ECU connector A-02 is disconnected.

Data Link Connector Circuit

AC001985

CONNECTOR: A-02

AD

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-28

CIRCUIT OPERATION

•

The diagnostic output is made from the ABS-
ECU (terminal 11) to the diagnostic output
terminal (terminal 7) of the data link connector.

•

When the data link connector's diagnostic test
mode control terminal (terminal 1) is grounded,
the ABS-ECU (terminal 12) will go into diagnostic
mode.

TECHNICAL DESCRIPTION (COMMENT)
When communication with the scan tool is not
possible, the cause is probably an open circuit in the
ABS-ECU power circuit or an open circuit in the
diagnostic output circuit.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

•

Blown fuse

•

Damaged wiring harness or connector

•

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

DIAGNOSIS

Required Special Tool:

•

MB991223: Harness Set

AC004429AB

CONNECTOR: C-29

COMBINATION METER

AC004427AB

CONNECTOR: C-77

COMBINATION
METER

AC004410AB

CONNECTOR: C-94

AC004413AB

CONNECTORS: C-101, C-107

C-107

C-101

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-29

STEP 1. Check the power supply circuit at the ABS-ECU
connector A-02.
(1)Disconnect the ABS-ECU connector A-02 and measure at

the harness side.

(2)Start the engine.
(3)Measure the voltage between terminal 15 and ground.

Q: Is the voltage approximately 12 volts (battery positive

voltage)?
YES : Go to Step 3.
NO : Go to Step 2.

STEP 2. Check the harness wire between the ignition
switch (IG2) and the ABS-ECU connector A-02.
NOTE: After inspecting the intermediate connector C-94, C-
101, or C-107, inspect the wire. If the intermediate connector
C-94, C-101, or C-107 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 3 .

Q: Is the harness wire between the ignition switch (IG2)

and the ABS-ECU connector A-02 damaged?
YES : Repair it and go to Step 5.
NO : Go to Step 3.

AC000947

A-02 (HARNESS SIDE)

AB

AC001985

CONNECTOR: A-02

AD

AC004410AB

CONNECTOR: C-94

AC004413AB

CONNECTORS: C-101, C-107

C-107

C-101

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-30

STEP 3. Check the harness wires between the ABS-ECU
connector A-02 and the data link connector C-29.
NOTE: After inspecting the intermediate connector C-77 or C-
94, inspect the wires. If the intermediate connector C-77 or C-
94 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 4.

Q: Is any of the harness wires between the ABS-ECU

connector A-02 and the data link connector C-29
damaged?
YES : Repair it and go to Step 5.
NO : Go to Step 4.

AC001985

CONNECTOR: A-02

AD

AC004429AB

CONNECTOR: C-29

COMBINATION METER

AC004427AB

CONNECTOR: C-77

COMBINATION
METER

AC004410AB

CONNECTOR: C-94