Mitsubishi Lancer Evolution X. Manual - part 13

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-77

STEP 2. Check the wiring harness between joint connector 
(CAN2) C-104 and AWC-ECU connector C-46 for a short to 
power supply. Measure the voltage at joint connector 
(CAN2) C-104.
(1) Disconnect joint connector (CAN2), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN2) 

terminal 5 and body ground.

OK: 4.7 V or less

(4) Measure the voltage between joint connector (CAN2) 

terminal 16 and body ground.

OK: 4.7 V or less

Q: Do all the voltages measure 4.7 V or less?

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

AC709708

TEST 
HARNESS

Harness side: C-104

AF

AC709708

Harness side: C-104

AG

TEST 
HARNESS

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-78

STEP 3. Check the wiring harness between joint connector 
(CAN2) C-104 and ETACS-ECU connector C-301 for a short 
to power supply. Measure the voltage at joint connector 
(CAN2) C-104.
(1) Disconnect joint connector (CAN2), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN2) 

terminal 6 and body ground.

OK: 4.7 V or less

(4) Measure the voltage between joint connector (CAN2) 

terminal 19 and body ground.

OK: 4.7 V or less

Q: Do all the voltages measure 4.7 V or less?

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

AC709708

TEST 
HARNESS

Harness side: C-104

AH

AC709708

Harness side: C-104

AI

TEST 
HARNESS

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-79

STEP 4. Check the wiring harness between joint connector 
(CAN3) C-127 and ASC-ECU connector A-05 for a short to 
power supply. Measure the voltage at joint connector 
(CAN3) C-127.
(1) Disconnect joint connector (CAN3), and measure the 

voltage at the wiring harness side of joint connector 
(CAN3).

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN3) 

terminal 6 and body ground.

OK: 4.7 V or less

(4) Measure the voltage between joint connector (CAN3) 

terminal 19 and body ground.

OK: 4.7 V or less

Q: Do all the voltages measure 4.7 V or less?

YES <M/T> : Go to Step 5.
YES <TC-SST> : Go to Step 6.
NO  :  Go to Step 13.

AC709708

TEST 
HARNESS

Harness side: C-127

AJ

AC709708

Harness side: C-127

AK

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-80

STEP 5. Check the wiring harness between joint connector 
(CAN3) C-127 and ECM connector B-10 <M/T> for a short to 
power supply. Measure the voltage at joint connector 
(CAN3) C-127.
(1) Disconnect joint connector (CAN3), and measure the 

voltage at the wiring harness side of joint connector 
(CAN3).

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN3) 

terminal 4 and body ground.

OK: 4.7 V or less

(4) Measure the voltage between joint connector (CAN3) 

terminal 15 and body ground.

OK: 4.7 V or less

Q: Do all the voltages measure 4.7 V or less?

YES : Check intermediate connector C-131, and repair if 

necessary. If the intermediate connector is in good 
condition, repair the wiring harness between joint 
connector (CAN2) C-104 and joint connector (CAN3) 
C-127.

NO :  Go to Step 14.

AC709708

TEST 
HARNESS

Harness side: C-127

AL

AC709708

Harness side: C-127

AM

TEST 
HARNESS