Mitsubishi L200. Manual - part 707

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-195

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1541402500025

Refer to GROUP 00 

− Contents of troubleshooting .

TROUBLE SYMPTOM CHART

M1541401000436

SYMPTOM PROCEDURES

Inspection Procedure 1: None of the tail lamps, position lamps and licence plate lamps illuminate.

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Number

Name

Use

MB992006

Symptom

Inspection 
procedure 
number

Reference 
page

Tail lamp

None of the tail lamps, position lamps and 
licence plate lamps illuminate.

1

P.54A-195

One of tail lamps does not illuminate.

2

P.54A-200

Tail Lamp Relay Circuit

ETACS-ECU

·TAIL LAMP
·POSITION LAMP
·LICENCE PLATE LAMP

FUSIBLE 
LINK

TAIL 
LAMP 
RELAY

TAIL LAMP SWITCH

INPUT SIGNAL

J/B SIDE

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue 
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

3

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-196

COMMENTS ON TROUBLE SYMPTOM
If none of  the tail lamps, position lamps and licence 
plate lamps illuminate, the tail lamp switch input cir-
cuit or the ETACS-ECU may be defective. Alter-
nately, there may be the case that the adjustment 
function has set the tail lamps not be illuminated 
when the ignition switch is at the "LOCK" (OFF) posi-
tion.

PROBABLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" 
(OFF) position, check that the ETACS-ECU does not 
set the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-494

.

NO : 

Go to Step 2.

STEP 2. M.U.T.-III data list
Check the input signal from the tail lamp switch.

• Turn the tail lamp switch to the ON position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure C-1 "The 
column switch (lighting and wiper switch) 
signal is not received 

P.54A-523

."

STEP 3. Connector check: C-218 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

STEP 4. Voltage measurement at C-218 ETACS-
ECU connector.

(1) Remove the ETACS-ECU, and measure at the 

Item 
No.

Item name

Normal condition

59

Tail lamp output

ON

AC509934

Connector: C-218 <LHD>

AJ

Junction 

block

Junction block side

AC509943

Connector: C-218 <RHD>

AC

Junction block

 (Rear view)

Junction block side

AC509934

Connector: C-218 <LHD>

AJ

Junction 

block

Junction block side

AC509943

Connector: C-218 <RHD>

AC

Junction block

 (Rear view)

Junction block side

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-197

junction box side.

(2) Voltage between C-218 ETACS-ECU connector 

terminal No.16 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

AC310507 FY

Connector C-218 

(Junction block side)

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-198

STEP 5. Check the wiring harness between C-218 
ETACS-ECU connector terminal No.16 and the 
fusible link (3).