Mitsubishi 380. Manual - part 707

 

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Mitsubishi 380. Manual - part 707

 

 

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-238

(2) Connect special tool MB992045 (A/T check harness) to the 

A/T-ECU and the wiring harness, and measure the 
resistance at special tool MB992045 (A/T check harness).

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

NOTE: When diagnosing CAN BUS on vehicles with 

manual transmission (M/T) disregard A/T-ECU and it’s wir-
ing circuits and measure between ABS-ECU and 
ENGINE-ECU only.

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 MB992045 

(A/T check harness) connector terminal 14 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-323

.

NO :  If the resistance measures less than 1 k

Ω, replace the 

A/T-ECU.

16DB498A

TEST
HARNESS

SPECIAL TOOL

MB992045

A/T-

ECU

MEASURE AT THIS CONNECTOR

SPECIAL TOOL MB992045 

CONNECTOR

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-239

DIAGNOSTIC ITEM 5: Diagnose shorts between CAN_L and H lines

NOTE: When diagnosing CAN-BUS on vehicles 
with manual transmission (M/T), disregard 
A/T-ECU and it’s wiring circuits.

NOTE: When diagnosing CAN-BUS on vehicles 
that are not equipped with a multi-centre display, 
disregard the multi-centre display and it’s wiring 
circuits.

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.

.

TROUBLE JUDGMENT

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.

.

16DB402A

A-02 (GR)

CONNECTOR: A-02 

A-02 HARNESS CONNECTOR:

16DB407A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

16DB474A

C-218 (GR)

CONNECTOR: C-218

HARNESS SIDE

JUNCTION BLOCK

(REAR VIEW)

16DB472A

C-101

C-125 (B)

C-29

C-02

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

16DB489A

CONNECTORS: C-05, C-15, C-121

C-121 (Y)

C-15 (B)

C-05 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-240

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

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The wiring harness or connectors may have 

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

• The ETACS-ECU

• The combination meter may be defective

• The A/C-ECU may be defective

• The SRS-ECU may be defective

• The multi-center display unit  may be defective

• The ABS-ECU may be defective

• The A/T-ECU may be defective

• The ENGINE- ECU may be defective

NOTE: When diagnosing CAN-BUS on vehi-

cles with manual transmission (M/T), disregard 
A/T-ECU and it’s wiring circuits.

NOTE: When diagnosing CAN-BUS on vehicles 
that are not equipped with a multi-centre display, 
disregard the multi-centre display and it’s wiring 
circuits.

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-241

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991219: Inspection Test Harness

• MB992045: A/T-ECU Check Harness

• MB992044: ENGINE-ECU 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.

52DB014A

CONNECTOR: C-29

 

 

 

 

 

 

 

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