Mitsubishi Evolution X. Manual - part 963

REAR COMBINATION LIGHT

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CHASSIS ELECTRICAL

54A-213

TECHNICAL DESCRIPTION (COMMENT)

If any of the taillights does not Illuminate, the wiring 
harness, connector(s), or rear combination light unit 
may have a problem, or the fuse may be burned out.

.

TROUBLESHOOTING HINTS

• Malfunction of rear combination light unit

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

• 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 (Vehicles with 

CAN communication system)

STEP 1. Check rear combination light connector F-25 (LH) 
or F-06 (RH) for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Is rear combination light connector F-25 (RH) or F-06 

(LH) in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 2. Resistance measurement at rear combination light 
connector F-25 (LH) or F-06 (RH).
(1) Disconnect the connector, and measure at the wiring 

harness side.

(2) Measure the resistance between the connector of light 

which does not illuminate and body ground.

•

Measure the resistance between rear combination light 
(LH) connector F-25 (terminal 1) and body ground.

AC608255 AT

Harness side: F-20

REAR COMBINATION LIGHT

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CHASSIS ELECTRICAL

54A-214

•

Measure the resistance between rear combination light 
(RH) connector F-06 ( terminal 1) and body ground.

OK: The measured value should be continuity 
exists (2 ohms or less).

Q: Does the measured resistance value correspond with 

this range?
YES : Go to Step 4.
NO :  Go to Step 3.

STEP 3. Check the wiring harness between rear 
combination light connectors F-25 (LH) (terminal 1) or F-06 
(RH) (terminal 1) and ground.
Q: Is the wiring harness between rear combination light 

connectors F-25 (LH) (terminal 1) or F-06 (RH) (terminal 
1) and ground in good condition?
YES : Go to Step 6.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 4. Check ETACS-ECU connectors C-311 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connectors C-311 in good condition?

YES : Go to Step 5.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC608255 AW

Harness side: F-06

REAR COMBINATION LIGHT

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CHASSIS ELECTRICAL

54A-215

STEP 5. Check the wiring harness between rear 
combination light connector and ETACS-ECU connector.
Check the power supply line for open circuit.

• Check the wiring harness between rear combination light 

(LH) connector F-25 (terminal 3) and ETACS-ECU connec-
tor C-311 (terminal 10). <LH>

• Check the wiring harness between rear combination light 

(RH) connector F-06 (terminal 3) and ETACS-ECU connec-
tor C-311 (terminal 13). <RH>
NOTE: Also check joint connector C-43 and intermediate 
connector D-11 for loose, corroded, or damaged terminals, 
or terminals pushed back in the connector. If joint connector 
C-43 or intermediate connector D-11 is damaged, repair or 
replace the connector as described in GROUP 00E, Har-
ness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between rear combination light 

connector and ETACS-ECU connector in good 
condition?
YES : Go to Step 6.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 6. Retest the system.
Check that the taillight illuminates normally.
Q: Does the taillight work normally?

YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points, How to 
Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the defective rear combination light unit.

REAR COMBINATION LIGHT

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CHASSIS ELECTRICAL

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REAR COMBINATION LIGHT REMOVAL AND INSTALLATION

M1541402200295

AC709273AB

2

4

5

6

7

1.2 ± 0.7 N·m 
11 ± 6 in-lb

Grommet

Section A - A

Grommet

Section B - B

3

1

A

A

B

B

2

2

Removal Steps 

1.

Rear combination light assembly

2.

Rear combination light unit

3.

Stop/taillight bulb

4.

Rear turn-signal light bulb

5.

Rear side-marker light bulb

6.

Socket

7.

Grommet

Removal Steps (Continued)