Mitsubishi Lancer Evolution X. Manual - part 7

 

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Mitsubishi Lancer Evolution X. Manual - part 7

 

 

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-53

.

FUNCTION

If a short to ground is present in the CAN-C lines, this 
diagnosis result will be set.

.

TROUBLE JUDGMENT CONDITIONS

If DTC U1120 is set, the ETACS-ECU determines 
that there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector (short to ground 

inside connector)

• Malfunction of the wiring harness (short to ground 

in the CAN-C main or sub bus lines)

• Malfunction of the ECU (ETACS-ECU, or ECUs 

on CAN-C lines failed)

AC708948

Connector: A-05

A-05 (B)

AB

AC708949AM

Connector: A-14

AC709137

Connectors: B-10, B-107

AC

B-10 (GR)

B-107 (B)

AC708951CB

Connectors: C-27, C-127

C-27

C-127

AC708950BU

C-46

C-104

Connectors: C-46, C-104

AC708953AH

Connector: C-209

AC708972AY

Connector: C-301

ETACS-ECU

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-54

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A

• MB992110: Power plant ECU check harness
• MB991997: ASC Check Harness

STEP 1. Check the wiring harness between joint connector 
(CAN2) C-104 and steering wheel sensor connector C-209 
for a short to ground. Measure the resistance at joint 
connector (CAN2) C-104.

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-7

.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN2), and measure the 

resistance at the wiring harness side of joint connector 
(CAN2).

(2) Measure the resistance between joint connector (CAN2) 

terminal 7 and body ground.

OK: 1 kΩ or more

(3) Measure the resistance between joint connector (CAN2) 

terminal 20 and body ground.

OK: 1 kΩ or more

Q: Do all the resistances measure 1 kΩ or more?

YES : Go to Step 2.
NO :  Go to Step 10.

AC709707

Harness side: C-104

AP

TEST 
HARNESS

AC709707AQ

TEST 
HARNESS

Harness side: C-104

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-55

STEP 2. Check the wiring harness between joint connector 
(CAN2) C-104 and AWC-ECU connector C-46 for a short to 
ground. Measure the resistance at joint connector (CAN2) 
C-104.

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-7

.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN2), and measure the 

resistance at the wiring harness side of joint connector 
(CAN2).

(2) Measure the resistance between joint connector (CAN2) 

terminal 5 and body ground.

OK: 1 kΩ or more

(3) Measure the resistance between joint connector (CAN2) 

terminal 16 and body ground.

OK: 1 kΩ or more

Q: Do all the resistances measure 1 kΩ or more?

YES : Go to Step 3.
NO :  Go to Step 11.

AC709707

Harness side: C-104

AR

TEST 
HARNESS

AC709707AS

TEST 
HARNESS

Harness side: C-104

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-56

STEP 3. Check the wiring harness between joint connector 
(CAN2) C-104 and ETACS-ECU connector C-301 for a short 
to ground. Measure the resistance at joint connector 
(CAN2) C-104.

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to 

P.54C-7

.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN2), and measure the 

resistance at the wiring harness side of joint connector 
(CAN2).

(2) Measure the resistance between joint connector (CAN2) 

terminal 6 and body ground.

OK: 1 kΩ or more

(3) Measure the resistance between joint connector (CAN2) 

terminal 19 and body ground.

OK: 1 kΩ or more

Q: Do all the resistances measure 1 kΩ or more?

YES : Go to Step 4.
NO :  Go to Step 12.

AC709707

Harness side: C-104

AT

TEST 
HARNESS

AC709707AU

TEST 
HARNESS

Harness side: C-104

 

 

 

 

 

 

 

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