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
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