Mitsubishi Galant 9G. Manual — part 1334

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-440

STEP 9. Check the terminator resistor inside the
powertrain control module. Measure the resistance at
powertrain control module connector B-19.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-4

.

(1) Disconnect powertrain control module connector B-19, and

measure the resistance at the component side of
powertrain control module connector B-19.

(2) Measure the resistance between powertrain control module

connector terminals 17 and 18.

OK: 120

± 20 Ω

Q: Does the resistance measure 120

± 20 Ω?

YES : If the resistance measures 120

± 20 Ω, diagnose CAN

bus lines thoroughly by referring to

P.54C-456

.

NO : If the resistance does not measure 120

± 20 , replace

the powertrain control module.

AC306248AD

B-19 (B)

CONNECTOR: B-19

PCM

AIR
CLEANER

HARNESS SIDE

AC209438

AC209438

AC209438

AC209438

COMPONENT SIDE: B-19

BD

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-441

DIAGNOSTIC ITEM 13: Diagnose a terminator resistor at either end <Vehicles with ABS>

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-442

.

TROUBLE JUDGMENT

A terminator resistor at either end (including the CAN
bus lines) may be damaged, when the resistance
between the CAN bus lines (CAN_L and H lines) is
120

± 20 Ω.

.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line harness wires or connectors may
be damaged or the combination meter or the power-
train control module 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 combination meter may be defective

• The ABS-ECU may be defective

• The powertrain control module may be defective

AC305206

CONNECTOR: A-02

AR

A-02 (GR)

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

AC305231CA

C-101

C-29

C-02

CONNECTORS: C-02, C-29, C-101

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-443

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991970: ABS Check Harness

STEP 1. Check intermediate connector C-29 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: Is intermediate connector C-29 in good condition?

YES : Go to Step 2.
NO : Repair the damaged parts.

AC305231AI

CONNECTOR: C-29