Mitsubishi Outlander GS45X. Manual - part 1307

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-173

.

FUNCTION

If a short to power supply or ground, open circuit or 
line-to-line short is present at either CAN_H or 
CAN_L side on the CAN-B lines, this diagnosis result 
will be set.

.

TROUBLE JUDGMENT CONDITIONS

When CAN-B lines communication is normal, and 
diagnostic trouble code U0019 is set, the 
ETACS-ECU determines that there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector (short to power sup-

ply or ground in connector or improperly con-
nected)

• Malfunction of the wiring harness (short to power 

supply or ground, open circuit or line-to-line short 
in CAN bus lines)

• Faulty ECU(s) (internal short to power supply or 

ground)

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

AC901075 BA

Connectors: C-03, C-29, C-31, C-102, C-103

C-03

C-29

C-31

C-102

C-103

AC901076 AJ

Connectors: C-13, C-16, C-17, C-28

C-13

C-16, 
C-17

C-28 (Y)

ACA02654

AL

Connectors: C-109, C-111

C-111

C-109 (B)

ACA02655BB

Connector: C-301

AC901079AX

Connectors: D-34, D-34-2

D-34, 
D-34-2

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-174

STEP 1. Check the wiring harness between ETACS-ECU 
connector C-301 and body ground for a short to ground. 
Measure the resistance at ETACS-ECU connector C-301.

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.42B-15

.

CAUTION

A digital multimeter should be used. For details refer to 

P.42C-10

.

CAUTION

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

P.54C-7

.

(1) Disconnect ETACS-ECU connector C-301, and measure 

the voltage at the wiring harness side of ETACS-ECU 
connector.

(2) Measure the resistance between ETACS-ECU connector 

terminal 6 and body ground.

OK: 1 k

Ω or more

(3) Measure the resistance between ETACS-ECU connector 

terminal 7 and body ground.

OK: 1 k

Ω or more

Q: Do all the resistances measure 1 k

Ω or more?

YES : Go to Step 2.
NO :  Go to Step 12.

AC702818 CT

Harness side: C-301

Test 
harness

AC702818

AC702818CU

Harness side: C-301

Test 
harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-175

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-103 and combination meter connector C-03 for a 
short to ground. Measure the resistance at joint connector 
(CAN1) C-103.
(1) Disconnect joint connector (CAN1), and measure the 

resistance at the wiring harness side of joint connector 
(CAN1).

(2) Measure the resistance between joint connector (CAN1) 

terminal 4 and body ground.

OK: 1 k

Ω or more

(3) Measure the resistance between joint connector (CAN1) 

terminal 15 and body ground.

OK: 1 k

Ω or more

Q: Do all the resistances measure 1 k

Ω or more?

YES (vehicles with KOS) : Go to Step 3.
YES (vehicles with WCM) : Go to Step 4.
NO (vehicles with KOS or WCM) : Go to Step 44.

AC702818 DP

Harness side: C-103

Test 
harness

AC702818 DQ

Harness side: C-103

Test 
harness

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-176

STEP 3. Check the wiring harness between joint connector 
(CAN1) C-103 and KOS-ECU connector C-102 for a short to 
ground. Measure the resistance at joint connector (CAN1) 
C-103.
(1) Disconnect joint connector (CAN1), and measure the 

resistance at the wiring harness side of joint connector 
(CAN1).

(2) Measure the resistance between joint connector (CAN1) 

terminal 8 and body ground.

OK: 1 k

Ω or more

(3) Measure the resistance between joint connector (CAN1) 

terminal 21 and body ground.

OK: 1 k

Ω or more

Q: Do all the resistances measure 1 k

Ω or more?

YES : Go to Step 5.
NO :  Go to Step 45.

AC702818 CB

Harness side: C-103

Test harness

AC702818 CC

Harness side: C-103

Test harness