Mitsubishi Galant (2004+). Manual — part 493

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-583

STEP 3. Check the CAN bus lines inside the ABS-ECU.

Measure the resistance at ABS-ECU connector A-02.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-4

.

(1) Disconnect ABS-ECU connector A-02, and measure the

resistance at the component side of ABS-ECU connector
A-02.

(2) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4

.

(3) Disconnect the negative battery terminal.

(4) Measure the resistance between ABS-ECU connector

terminals 7 and 23.

OK: 2 ohms or less

(5) Measure the resistance between ABS-ECU connector

terminals 24 and 25.

OK: 2 ohms or less

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to

P.54C-5

.

Q: Do all the resistances measure 2 ohms or less?

YES : If all the resistances measure 2 ohms or less, power

supply to the powertrain control module may be
suspected. Diagnose the engine. Refer to GROUP
13A, MFI diagnosis

P.13A-944

<2.4L engine> or

GROUP 13B, MFI diagnosis

P.13B-968

<3.8L

engine>.

NO : If either of the resistances measures more than 2

ohms or all the resistances measure more than 2
ohms, replace the ABS-ECU.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC209438

COMPONENT SIDE: A-02

TEST
HARNESS

AC

TEST
HARNESS

AC209438

COMPONENT SIDE: A-02

AD

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-584

DIAGNOSTIC ITEM 19: Diagnose the lines between CAN main bus line and the ABS-ECU.

CAUTION

When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component con-
nected to the CAN bus line may be damaged.

POWERTRAIN
CONTROL MODULE

ABS-ECU

JOINT
CONNECTOR (3)

COMBINATION
METER

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-585

.

TROUBLE JUDGMENT
If the MUT-III cannot received signals from
ABS-ECU, CAN bus line connector(s) are broken or
an open circuit has occurred.

.

COMMENTS ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the ABS-ECU may
be defective.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have

loose, corroded, or damage terminals, or termi-
nals pushed back in the connector

• The ABS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991970: ABS Check Harness

STEP 1. Check intermediate connector C-29 and ABS-ECU
connector A-02 for loose, corroded or damaged terminals,
or terminals pushed back in the connector.

CAUTION

The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to

P.54C-4

.

Q: Are intermediate connector C-29 and ABS-ECU

connector A-02 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts. Replace the joint

connector as necessary.

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC305231AX

CONNECTORS: C-02, C-29

C-02

C-29

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC305231AI

CONNECTOR: C-29

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-586

STEP 2. Check the CAN bus lines between intermediate
connector C-29 and the ABS-ECU. Measure the resistance
between intermediate connector C-29 and ABS-ECU

connector A-02.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

CAUTION

The test wiring harness should be used. For details refer to

P.54C-4

.

(1) Disconnect intermediate connector C-29 and ABS-ECU

connector A-02, and measure the resistance between the
wiring harness side connector of ABS-ECU connector A-02
and the male side connector of intermediate connector
C-29 (at front wiring harness side).

(2) Turn the ignition switch to the "LOCK" (OFF) position.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-4

.

(3) Disconnect the negative battery terminal.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC305231AI

CONNECTOR: C-29