Mitsubishi Galant (2004+). Manual - part 425

 

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Mitsubishi Galant (2004+). Manual - part 425

 

 

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-311

(4) Measure the resistance between powertrain control module 

connector terminal 18 and body ground.

OK: 1 k

 or more

CAUTION

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

P.54C-5

.

Q: Does the resistance measure 1 k

 or more?

YES : If the resistance measures 1 k

Ω or more, go to Step 

55   .

NO :  If the resistance measures less than 1 k

Ω, repair the 

wiring harness between powertrain control module 
connector and ABS-ECU connector.

AC209364IP

HARNESS SIDE: B-19

TEST HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-312

STEP 55. Check the CAN_L line inside the ABS-ECU for 
short to ground. 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.

(2) Connect special tool MB991970 (ABS check harness) to 

the ABS-ECU and the wiring harness, and measure the 
resistance at special tool MB991970 (ABS check harness).

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

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-4

.

(4) Disconnect the negative battery terminal.
(5) Measure the resistance between special tool MB991970 

(ABS check harness) connector terminal 7 and body 
ground.

OK: 1 k

 or more

Q: Does the resistance measure 1 k

 or more?

YES : If the resistance measures 1 k

Ω or more, diagnose 

CAN bus lines thoroughly by referring to 

P.54C-534

.

NO :  If the resistance measures less than 1 k

Ω, replace the 

ABS-ECU.

AC305206

CONNECTOR: A-02

AG

A-02 (GR)

HARNESS SIDE

AC209767

TEST 
HARNESS

2

19

1

18

25

8

15

16

17

27

28

26

11

9

10

12

13

14

23

24

22 21

7

6

5

4

20

3

SPECIAL TOOL
MB991970

ABS-
ECU

SPECIAL TOOL MB991970 
CONNECTOR

AD

MEASUREMENT CONNECTOR

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-313

DIAGNOSTIC ITEM 7: Diagnose shorts between CAN_L and H lines <Vehicles without ABS and 
vehicles without multi-center display (middle-grade type)>

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.

DATA LINK
CONNECTOR

ETACS-ECU

POWERTRAIN
CONTROL MODULE

JOINT
CONNECTOR (3)

COMBINATION
METER

A/C-ECU

SRS-ECU

NOTE

: MANUAL AIR CONDITIONING SYSTEM <LOW>
: MANUAL AIR CONDITIONING SYSTEM <MIDDLE>
  OR AUTOMATIC AIR CONDITIONING SYSTEM

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-314

.

TROUBLE JUDGMENT
A short circuit may be present between the CAN_L 
and H lines when the resistance between the CAN 
bus lines (CAN_L and H lines) is less than 2 ohms.

.

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 a ECU may be 
defective.

.

TROUBLESHOOTING HINTS

• The wiring harness or connectors may have 

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

• The ETACS-ECU may be defective

• The combination meter may be defective

• The A/C-ECU may be defective

• The SRS-ECU may be defective

• The powertrain control module may be defective

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

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.

AC306248AB

B-19 (B)

CONNECTOR: B-19

AIR
CLEANER

PCM

AC305231BZ

C-101

C-125 (B)

C-29

C-02

CONNECTORS: C-02, C-29, C-101, C-125

AC305233 AU

CONNECTORS: C-10, C-15, C-22, C-121

C-121 (Y)

C-22 (Y)

C-10 (B)

C-15 (B)

AC305413

C-218 (GR)

CONNECTOR: C-218

AJ

JUNCTION BLOCK
(REAR VIEW)

AC305231AI

CONNECTOR: C-29

 

 

 

 

 

 

 

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