Mitsubishi Evolution X. Manual - part 1144

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-211

STEP 20. Check the wiring harness between joint 
connector (CAN1) C-105 and A/C-ECU connector C-22 for a 
short to power supply. Measure the voltage at joint 
connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN1) 

terminal 1 and body ground.

OK: 4.7 volts or less

(4) Measure the voltage between joint connector (CAN1) 

terminal 12 and body ground.

OK: 4.7 volts or less

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

YES (vehicles without MMCS) : Go to Step 21.
YES (vehicles with MMCS) : Go to Step 22.
NO  :  Go to Step 54.

STEP 21. Check the wiring harness between joint 
connector (CAN1) C-105 and radio and CD player or CD 
changer connector C-107 for a short to power supply. 
Measure the voltage at joint connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN1) 

terminal 5 and body ground.

OK: 4.7 volts or less

AC608178

TEST 
HARNESS

Harness side: C-105

BT

AC608178

Harness side: C-105

BU

TEST 
HARNESS

AC608178

TEST 
HARNESS

Harness side: C-105

BV

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-212

(4) Measure the voltage between joint connector (CAN1) 

terminal 16 and body ground.

OK: 4.7 volts or less

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

YES (vehicles without satellite radio) : Go to Step 24.
YES (vehicles with satellite radio) : Go to Step 23.
NO  :  Go to Step 55.

STEP 22. Check the wiring harness between joint 
connector (CAN1) C-105 and CAN box unit connector C-15 
for a short to power supply. Measure the voltage at joint 
connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN1) 

terminal 5 and body ground.

OK: 4.7 volts or less

(4) Measure the voltage between joint connector (CAN1) 

terminal 16 and body ground.

OK: 4.7 volts or less

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

YES (vehicles without satellite radio) : Go to Step 24.
YES (vehicles with satellite radio) : Go to Step 23.
NO  :  Go to Step 56.

AC608178

Harness side: C-105

BW

TEST 
HARNESS

AC608178

TEST 
HARNESS

Harness side: C-105

BV

AC608178

Harness side: C-105

BW

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-213

STEP 23. Check the wiring harness between joint 
connector (CAN1) C-105 and satellite radio tuner 
connector C-18 for a short to power supply. Measure the 
voltage at joint connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1), and measure the 

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

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN1) 

terminal 2 and body ground.

OK: 4.7 volts or less

(4) Measure the voltage between joint connector (CAN1) 

terminal 13 and body ground.

OK: 4.7 volts or less

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

YES : Go to Step 24.
NO :  Go to Step 57.

STEP 24. Check the wiring harness between joint 
connector (CAN1) C-105 and ETACS-ECU connector C-301 
for a short to power supply. Measure the voltage at joint 
connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1) and ETACS-ECU 

connector C-301, and measure the voltage at the wiring 
harness side of joint connector (CAN1).

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between joint connector (CAN1) 

terminal 6 and body ground.

OK: 4.7 volts or less

AC608178

TEST 
HARNESS

Harness side: C-105

BY

AC608178

Harness side: C-06

BE

TEST 
HARNESS

AC608178

TEST 
HARNESS

Harness side: C-105

BX

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-214

(4) Measure the voltage between joint connector (CAN1) 

terminal 19 and body ground.

OK: 4.7 volts or less

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

YES : Go to Step 58.
NO :  Repair the wiring harness between joint connector 

(CAN1) C-105 and ETACS-ECU connector C-301.

STEP 25. Check the wiring harness for line-to-line short. 
Measure the resistance at ETACS-ECU connector C-301

CAUTION

Disconnect the negative battery terminal. For details refer 
to 

P.54C-7

.

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

there is continuity at the harness side of ETACS-ECU.

(2) Check that there is continuity between ETACS-ECU 

connector terminals 6 and 7.

OK: No continuity

Q: Is the check result normal?

YES : Go to Step 37.
NO :  Go to Step 26.

STEP 26. Check the wiring harness between joint 
connector (CAN1) C-105 and combination meter connector 
C-04 for line-to-line short. Measure the resistance at joint 
connector (CAN1) C-105.
(1) Disconnect joint connector (CAN1), and check that there is 

continuity at the harness side of joint connector (CAN1).

(2) Check that there is continuity between joint connector 

(CAN1) terminals 3 and 14.

OK: No continuity

Q: Is the check result normal?

YES (vehicles with KOS) : Go to Step 27.
YES (vehicles with WCM) : Go to Step 28.
NO (vehicles with KOS or WCM) : Go to Step 48.

AC608178

Harness side: C-105

BZ

TEST 
HARNESS

AC608179

Harness side: C-301

BN

TEST 
HARNESS

TEST 
HARNESS

AC709707

Harness side: C-105

CR

TEST 
HARNESS

TEST 
HARNESS