Mitsubishi Lancer (4A9 engine). Manual - part 167

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-330

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

STEP 6. Connector check: C-105 radio and CD 
player connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the defective connector.

STEP 7. Check the wiring harness between C-105 
radio and CD player connector terminal No.8, 18 
and C-10 centre panel unit connector terminal 
No.1, 2.

• Check the communication lines for open circuit 

and short circuit.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

STEP 8. Replace the centre panel unit 
temporarily, and check the trouble symptom.
Replace the centre panel unit temporarily, and check 
that the audio works normally.

Q: Is the check result normal?

YES : 

Replace the centre panel unit.

NO : 

Replace the radio and CD player.

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-331

Inspection Procedure 4: The radio and CD player does not operate normally by operating the audio 
control unit of the centre panel unit. <Vehicles with Auto Stop & Go (AS&G) System>

CAUTION

Before replacing the radio and CD player, ensure that the power supply circuit, the earth circuit and 
the communication circuit are normal.

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-332

Centre Panel Unit Power Source Circuit

CENTRE PANEL 
UNIT

AUDIO SWITCH PANEL

LCD PANEL (AUDIO, CLOCK)

RADIO AND CD PLAYER

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

FUSIBLE 
LINK

38

FUSIBLE 
LINK

36

ENGINE 
COMPARTMENT

RELAY BOX

NOTE

:PETROL
:DIESEL

DC/DC CONVERTER

RADIO AND CD PLAYER

CHASSIS ELECTRICAL

54A-333

COMMENTS ON TROUBLE SYMPTOM
When the radio and CD player does not operate nor-
mally by operating the audio control unit of the centre 
panel unit, the radio and CD player, centre panel unit, 
or the power supply circuit system of centre panel 
unit may be faulty.

PROBABLE CAUSES

• Malfunction of radio and CD player

• Malfunction of centre panel unit

• Malfunction of DC/DC converter

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-10 centre panel unit 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

STEP 2. Resistance measurement at C-10 centre 
panel unit connector
(1) Disconnect the connector, and measure at the 

wiring harness-side connector.

(2) Check the continuity between C-10 centre panel 

unit connector terminal No.9 and body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Check the wiring harness between C-10 
centre panel unit connector terminal No.9 and 
body earth.

• Check the earth wire for open circuit.

Q: Is the check result normal?

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 ).

NO : 

Repair the wiring harness.

STEP 4. Voltage measurement at C-10 centre 
panel unit connector.
(1) Disconnect the connector, and measure at the 

wiring harness-side connector.

(2) Measure the voltage between C-10 centre panel 

unit connector terminal No.7 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 5.

STEP 5. Connector check: C-65 DC/DC converter 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

ACA00892

Connectors: C-10, C-65, C-105 <LHD>

AF

C-65 (GR)

C-10

C-105

ACA00895AG

Connector: C-10, C-65, C-105 <RHD>

C-65 (GR)

C-105

C-10

ACA00886

AS

Connectors: C-307, C-311 <LHD>
ETACS-ECU

C-307

C-311

ACA00887

AS

Connectors: C-307, C-311 <RHD>
ETACS-ECU

C-311

C-307