Mitsubishi 380. Manual - part 727

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-319

STEP 13. Check the CAN bus lines inside the ABS-ECU. 
Measure the resistance at ABS-ECU connector A-02.

NOTE: when diagnosing CAN-BUS on vehicles with 
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and 
ENGINE-ECU only.

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 14 and 15.

OK: 2 ohms or less

16DB402A

A-02 (GR)

CONNECTOR: A-02 

A-02 HARNESS CONNECTOR:

16DB515A

COMPONENT SIDE: A-02

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-320

(5) Measure the resistance between ABS-ECU connector 

terminals 25 and 26.

OK: 2 ohms or less

NOTE: when diagnosing CAN-BUS on vehicles with 
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and 
ENGINE-ECU only.

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 the voltage measures 2 V or less, go to Step 14 or  

diagnose CAN bus lines thoroughly by referring to 

P.54C-323

 <Vehicles with multi-center display >.

NO :  Replace the ABS-ECU.

16DB516A

COMPONENT SIDE: A-02

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-321

STEP 14. Check the CAN bus lines inside the A/T-ECU. 
Measure the resistance at A/T-ECU connector B-19.

NOTE: when diagnosing CAN-BUS on vehicles with 
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and 
ENGINE-ECU only.

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

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 A/T-ECU connector B-19, and measure the 

resistance at the component side of A/T-ECU connector 
B-19.

(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 A/T-ECU connector B-19  

terminals 14 and 5.

OK: 2 ohms or less

16DB480A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

A/T

CONTROL

UNIT

16DB518A

TEST
HARNESS

TEST
HARNESS

COMPONENT SIDE:  B-19

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54C-322

(5) Measure the resistance between A/T-ECU connector B-19  

terminals 13 and 4.

OK: 2 ohms or less

NOTE: when diagnosing CAN-BUS on vehicles with 
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and 
ENGINE-ECU only.

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 the voltage measures 2 V or less, diagnose CAN 

bus lines thoroughly by referring to 

P.54C-323

 

<Vehicles with multi-center display >.

NO :  Replace the A/T-ECU.

16DB519A

TEST
HARNESS

TEST
HARNESS

COMPONENT SIDE:  B-19