Mitsubishi Lancer (4A9 engine). Manual — part 166
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-326
STEP 6. Check the wire harness between the
speaker or tweeter connector terminal and the
audio amplifier connector terminal.
Check the communication lines for open circuit or
short circuit.
• <Front door speaker (LH)> Check the wire har-
ness between E-12 front door speaker (LH) con-
nector terminal No.1, 2 and D-26 audio amplifier
connector terminal No.28, 38.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors C-17 and C-126, and
repair if necessary.
• <Front door speaker (RH)> Check the wire har-
ness between E-10 front door speaker (RH) con-
nector terminal No.1, 2 and D-26 audio amplifier
connector terminal No.27, 37.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors C-17 and C-112, and
repair if necessary.
• <Rear door speaker (LH)> Check the wire har-
ness between E-22 rear door speaker (LH) con-
nector terminal No.1, 2 and D-27 audio amplifier
connector terminal No.1, 7.
NOTE: Prior to the wiring harness inspection, check
intermediate connector D-21, and repair if neces-
sary.
• <Rear door speaker (RH)> Check the wire har-
ness between E-21 rear door speaker (RH) con-
nector terminal No.1, 2 and D-27 audio amplifier
connector terminal No.2, 8.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors D-01, and repair if nec-
essary.
• <Tweeter (LH)> Check the wire harness between
E-02 tweeter (LH) connector terminal No.1, 2 and
D-27 audio amplifier connector terminal No.14, 6.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors C-17 and C-126, and
repair if necessary.
• <Tweeter (RH)> Check the wire harness between
E-04 tweeter (RH) connector terminal No.1, 2
and D-27 audio amplifier connector terminal
No.13, 5.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors C-17 and C-112, and
repair if necessary.
• <Subwoofer> Check the wire harness between F-
25 subwoofer connector terminal No.1, 2, 3, 4
and D-26 audio amplifier connector terminal
No.30, 22, 29, 21.
NOTE: Prior to the wiring harness inspection, check
intermediate connectors D-17, and repair if nec-
essary.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 7. Connector check: C-103 radio and CD
player connector
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the defective connector.
STEP 8. Check the harness wire between C-103
radio and CD player connector terminal No.26,
28, 36, 38 and D-27 audio amplifier connector
No.10, 4, 11, 12.
• Check the communication lines for open circuit.
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-17, and repair if necessary.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the wiring harness.
STEP 9. Replace the audio amplifier temporarily,
and check the trouble symptom.
Replace the audio amplifier temporarily, and check
that the sound is output from the speaker.
Q: Is the check result normal?
YES :
Replace the audio amplifier.
NO :
Replace the radio and CD player.
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-327
Inspection Procedure 4: The radio and CD player does not operate normally by operating the audio
control unit of the centre panel unit. <Vehicles without 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-328
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
RADIO AND CD PLAYER
CHASSIS ELECTRICAL
54A-329
COMMENTS ON TROUBLE SYMPTOM
When the audio does not operate normally by oper-
ating 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
• 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 6.
NO :
Go to Step 5.
STEP 5. Check the wiring harness between C-10
centre panel unit connector terminal No.7 and
fusible link (36) <Petrol> or (38) <Diesel>
• Check the power supply line for open circuit and
short circuit.
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-31, C-128, ETACS-ECU
connector C-307 and C-311, and repair if necessary.
AC701094
Connectors: C-10, C-105 <LHD>
AN
C-10
C-105
AC701122 AZ
Connectors: C-10, C-105 <RHD>
C-10
C-105
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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