Mitsubishi Evolution X. Manual - part 949

HEADLIGHT

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CHASSIS ELECTRICAL

54A-157

STEP 9. Check the wiring harness between daytime 
running light (LH) connector A-41 (terminal 1) or daytime 
running light (RH) connector A-56 (terminal 1) and ground.

• Check the ground wires for open circuit.

Q: Is the wiring harness between daytime running light 

(LH) connector A-41 (terminal 1) or daytime running 
light (RH) connector A-56 (terminal 1) and ground in 
good condition?
YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00 

− How to Cope with Intermittent 

Malfunction 

P.00-15

).

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. Verify that 
the daytime running lights illuminate normally.

STEP 10. Check daytime running light relay connector 
A-24X for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Is daytime running light relay connector A-24X in good 

condition?
YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 11. Check the daytime running light relay.
Refer to 

P.54A-189

.

Q: Is the daytime running light relay in good condition?

YES : Go to Step 12.
NO :  Replace the daytime running light relay. Verify that the 

daytime running lights illuminate normally.

HEADLIGHT

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CHASSIS ELECTRICAL

54A-158

STEP 12. Check the battery power supply circuit to the 
daytime running light relay. Measure the voltage at daytime 
running light relay connector A-24X.

CAUTION

The top and bottom of the daytime running light relay are 
difficult to identify. Prior to inspection, confirm the triangle 
mark on the relay box.
(1) Disconnect daytime running light relay connector A-24X 

and measure the voltage available at the relay box side of 
the connector.

(2) Measure the voltage between terminal 2 and ground, and 

also between terminal 4 and ground.

OK: The voltage should measure approximately 12 
volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 14.
NO :  Go to Step 13.

STEP 13. Check the wiring harness between daytime 
running light relay connector A-24X (terminal 2 and 4) and 
fusible link (36).

• Check the power supply line for open circuit.

Q: Is the wiring harness between daytime running light 

relay connector A-24X (terminal 2 and 4) and fusible link 
(36) in good condition?
YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00 

− How to Cope with Intermittent 

Malfunction 

P.00-15

).

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. Verify that 
the daytime running lights illuminate normally.

STEP 14. Check ETACS-ECU connector C-312 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is ETACS-ECU connector C-312 in good condition?

YES : Go to Step 15.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC709325 AC

Harness side: A-24X

HEADLIGHT

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CHASSIS ELECTRICAL

54A-159

STEP 15. Check the wiring harness between daytime 
running light relay connector A-24X (terminal 1) and 
ETACS-ECU connector C-312 (terminal 10).

• Check the communication wires for open circuit.

Q: Is the wiring harness between daytime running light 

relay connector A-24X (terminal 1) and ETACS-ECU 
connector C-312 (terminal 10) in good condition?
YES : Go to Step 16.
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. Verify that 
the daytime running lights illuminate normally.

STEP 16. Retest the system.
Q: Does the daytime running lights illuminate in good 

condition?
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 ETACS-ECU.

HEADLIGHT

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CHASSIS ELECTRICAL

54A-160

Inspection Procedure 9: Any of the tail lights, the position lights or the license plate lights does not 
Illuminate.

Position Lights, Licence Plate Lights and Tail Lights Circuit

REAR
COMBINATION
LIGHT [TAILLIGHT]
(LH)                  (RH)

ETACS-
ECU

TAILLIGHT CONTROL CIRCUIT

JOINT
CONNECTOR

LICENCE
PLATE
LIGHT
(LH)  (RH)

    TAILLIGHT
(LH)              (RH)

POSITION
LIGHT: LH

POSITION
LIGHT: RH