Mitsubishi Evolution X. Manual — part 989
RADIO AND CD PLAYER
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CHASSIS ELECTRICAL
54A-317
TROUBLE SYMPTOM CHART
M1544004901302
Inspection
Procedure No.
Trouble symptom
Reference
page
1
Power is not turned ON when the power switch is turned ON.
2
No sound is heard. <Vehicles with audio amplifier>
3
No sound is heard from one
of the speakers.
<Vehicles without audio amplifier>
<Vehicles with audio amplifier>
4
The audio does not operate normally by operating the radio and CD player of
the center panel unit.
5
Audio illuminations does not work normally.
6
The sound of external input are not played.
7
Noise
Noise is present while moving (AM).
8
Noise is present while moving (FM).
9
Sound mixed with noise, only at night (AM).
10
Noise is overpowering both AM and FM.
11
Excessive noise on AM and FM.
12
Noise is detected with engine running.
13
Noise appears during vibration or shocks.
14
Noise is present while moving (FM).
15
Constant noise.
16
Radio
No reception (AM).
17
Poor reception.
18
Distortion on AM and/or FM.
19
Distortion on FM only.
20
Auto select function inoperative, too few
automatic stations are selected.
21
Preset stations are erased.
22
CD player
CD cannot be inserted.
23
No sound. (CD only).
24
CD sound skips.
25
Sound quality is poor.
26
CD cannot be ejected.
RADIO AND CD PLAYER
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CHASSIS ELECTRICAL
54A-318
SYMPTOM PROCEDURES
Inspection Procedure 1: Power is not turned ON when the power switch is turned ON.
CAUTION
When replacing the ECU, always check that the
communication circuit is normal.
.
Radio and CD Player Power Supply Circuit
ETACS-
ECU
RELAY BOX
ENGINE
COMPARTMENT
CAN
COMMUNICATION LINE
ETACS-ECU
RADIO AND CD PLAYER
INPUT SIGNAL
IGNITION SWITCH (ACC)
FUSIBLE
LINK
36
AC708951BD
Connector: C-107
AC708972BA
Connectors: C-307, C-317
ETACS-ECU
C-307 (B)
C-317
RADIO AND CD PLAYER
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CHASSIS ELECTRICAL
54A-319
OPERATION
When the ignition switch is in the ON or ACC posi-
tion, the radio and CD player power can be turned
ON. With the radio and CD player power ON, when
the ignition switch is turned to the OFF position, the
power for radio and CD player is also turned OFF.
.
COMMENTS ON TROUBLE SYMPTOM
Provided that the audio diagnostic trouble code is not
set, if the power for radio and CD player cannot be
turned ON, the radio and CD player, or power supply
circuit for radio and CD player may have a problem,
or the option coding information may be inconsistent.
.
PROBABLE CAUSES
• The radio and CD player may be defective
• The ETACS-ECU may be defective
• Option coding information inconsistency
• Damaged harness wires and connectors
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. ETACS-ECU coding data check.
(1) Operate scan tool MB991958 to read the ETACS-ECU
option coding information (Refer to GROUP 00, Coding
Table
(2) Check that the "AUDIO" is set to "enabled."
Q: Is the check result normal?
YES : Go to Step 2.
NO : Operate scan tool MB991958 to set the option coding
"AUDIO" to "enabled," and check the trouble
symptom.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
RADIO AND CD PLAYER
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CHASSIS ELECTRICAL
54A-320
STEP 2. Using scan tool MB991958, diagnose the CAN bus
line.
Use scan tool MB991958 to diagnose the CAN bus lines.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus line. (Refer to GROUP 54C,
.) On completion, go to Step 3.
STEP 3. Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code.
Check if the diagnostic trouble code is set to the ETACS-ECU.
Q: Is the DTC set?
YES : Troubleshoot the ETACS-ECU (Refer to GROUP
54A, ETACS, Diagnosis
NO : Go to Step 4.
STEP 4. Using scan tool MB991958, check data list.
Check the input signal of ACC relay.
• Turn the ignition switch to the ACC position.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES : Go to Step 5.
NO : Refer to GROUP 54A, ETACS, Diagnosis
− Inspection
Procedure 1 "The ignition switch (ACC) signal is not
received"
.
STEP 5. Check ETACS-ECU connector C-317 and radio and
CD player connector C-107 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Are ETACS-ECU connector C-317 and radio and CD
player connector C-107 in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s) (Refer
to GROUP 00E, Harness Connector Inspection
). The steering remote control switch should
work normally.
Item No.
Item name
Normal conditions
Item 288
ACC switch
ON
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