Mitsubishi Lancer (4A9 engine). Manual - part 152

ACCESSORY SOCKET AND CIGARETTE LIGHTER

CHASSIS ELECTRICAL

54A-270

Tool

Number

Name

Use

MB991955

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991825
f. MB991826

M.U.T.-III sub-
assembly

a. Vehicle 

communication 
interface (V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A (for 
vehicles with CAN 
communication)

d. M.U.T.-III main 

harness B (for 
vehicles without 
CAN 
communication)

e. Measuring adapter 

harness

f. M.U.T.-III trigger 

harness

CAUTION

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send the 
simulated vehicle speed. If you 
connect M.U.T.-III main harness 
B instead, CAN communication 
does not function correctly.
M.U.T.-III diagnosis code display, 
service data display

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Wiring harness set

a. Check harness
b. LED harness
c. LED harness 

adapter

d. Probe

Continuity check and voltage 
measurement at wiring harness or 
connector

a. For checking connector pin 

contact pressure

b. For checking power supply 

circuit

c. For checking power supply 

circuit

d. For connecting a locally 

sourced tester

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991223

a

d

c

b

DO NOT USE

BA

ACCESSORY SOCKET AND CIGARETTE LIGHTER

CHASSIS ELECTRICAL

54A-271

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1542301100020

Refer to GROUP 00 

− Contents of troubleshooting .

TROUBLE SYMPTOM CHART

M1542300800093

MB992006

Extra fine probe

Continuity check and voltage 
measurement at wiring harness or 
connector

Tool

Number

Name

Use

MB992006

Trouble symptom

Inspection 
Procedure No.

Reference 
page

The accessory socket does not work. <Vehicles with accessory 
socket>

1

The cigar lighter does not work.<Vehicles with cigar lighter>

2

ACCESSORY SOCKET AND CIGARETTE LIGHTER

CHASSIS ELECTRICAL

54A-272

SYMPTOM PROCEDURES

Inspection Procedure 1: The accessory socket does not work. <Vehicles with accessory socket>

CAUTION

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.

Accessory Socket Circuit

ETACS-ECU

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

ACC 
RELAY 2

IGNITION 
SWITCH (ACC)

ACCESSORY 
SOCKET 

FRONT FLOOR 
CONSOLE

ACCESSORY 
SOCKET 

REAR FLOOR 
CONSOLE

FUSIBLE 
LINK

37

42

: DIESEL

PETROL

:

VEHICLES WITH ACCESSORY SOCKET 
(REAR FLOOR CONSOLE)

:

NOTE

ACCESSORY SOCKET AND CIGARETTE LIGHTER

CHASSIS ELECTRICAL

54A-273

OPERATION
When the ignition switch is in the ON or ACC posi-
tion, the accessory socket can be used.
NOTE: The maximum load of accessory socket is 
120 W.

COMMENTS ON TROUBLE SYMPTOM
If the accessory socket cannot be used even when 
the ignition switch is in the ON or ACC position, 
ETACS-ECU, accessory socket itself, or accessory 
socket power supply circuit may have a problem.

PROBABLE CAUSES

• Malfunctions of accessory socket (front floor con-

sole)

• Malfunctions of accessory socket (rear floor con-

sole) <vehicles with accessory socket (rear floor 
console)>

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III other system diagnosis code
Check if the diagnosis code is set to the ETACS-
ECU.

Q: Is the check result normal?

YES : 

Troubleshoot the ETACS-ECU. Refer to 

ETACS-ECU 

− Troubleshooting .

NO : 

Go to Step 2.

STEP 2. M.U.T.-III other system data list
Check the input signal of ACC relay. (ETACS-ECU)

• Turn the ignition switch to the ACC position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to ETACS 

− Input Signal Procedure 1 

"The ignition switch (ACC) signal is not sent 
to the ETACS-ECU" .

STEP 3. Connector check: C-315 ETACS-ECU 
connector, C-51 accessory socket (front floor 
console) connector, C-18 accessory socket (rear 
floor console) connector <vehicles with 
accessory socket (rear console)>

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

STEP 4. Voltage measurement at C-51 accessory 
socket (front floor console) connector and C-18 
accessory socket (rear floor console) connector 
<vehicles with accessory socket (rear floor 
console)>.
(1) Disconnect the connector, and measure at the 

wiring harness-side connector.

(2) Turn the ignition switch to the "ACC" or "ON" 

position.

ACA00921

Connectors: C-18, C-51 <LHD>

AB

C-51

C-18

ACA00923

Connectors: C-18, C-51 <RHD>

AB

C-51

C-18

ACA00886

AN

Connector: C-315 <LHD>
ETACS-ECU

ACA00887

AL

Connector: C-315 <RHD>
ETACS-ECU

Item No.

Item name

Normal 
condition

Item 288

ACC switch

ON