Mitsubishi Evolution X. Manual — part 1040
STEERING WHEEL AUDIO REMOTE CONTROL SWITCH
TSB Revision
CHASSIS ELECTRICAL
54A-521
DIAGNOSIS
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
M1544004800584
Refer to GROUP 00, Troubleshooting contents
.
TROUBLE SYMPTOM CHART
M1544004901324
MB991223
a. MB991219
b. MB991220
c. MB991221
d. MB991222
Harness set
a. Check harness
b. LED harness
c. LED harness
adapter
d. Probe
General service tool
(jumper)
Continuity check and voltage
measurement at harness wire 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
MB992006
Extra fine probe
−
Continuity check and voltage
measurement at harness wire or
connector
Tool
Tool number and
name
Supersession
Application
MB991223
a
d
c
b
DO NOT USE
BA
MB992006
Inspection
Procedure No.
Trouble symptom
Reference
page
1
Steering wheel audio remote control
switch does not function.
<vehicles with radio and CD player>
2
<vehicles with MMCS>
3
Steering wheel audio remote control switch illumination does not come on.
STEERING WHEEL AUDIO REMOTE CONTROL SWITCH
TSB Revision
CHASSIS ELECTRICAL
54A-522
SYMPTOM PROCEDURES
Inspection Procedure 1: Steering wheel audio remote control switch does not Function. <Vehicles
with radio and CD player>
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
RADIO AND CD PLAYER
CLOCK
SPRING
STEERING WHEEL AUDIO
REMOTE CONTROL
SWITCH
Steering Wheel Audio Remote Control Switch Circuit
STEERING WHEEL AUDIO REMOTE CONTROL SWITCH
TSB Revision
CHASSIS ELECTRICAL
54A-523
.
TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit to the steering wheel audio
remote control switch, the steering wheel audio
remote control switch, the radio and CD player, or
the clock spring may be defective.
.
TROUBLESHOOTING HINTS
• The steering wheel audio remote control switch
may be defective.
• The radio and CD player may be defective.
• The clock spring may be defective.
• 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
AC708951BU
C-32
C-110
Connectors: C-32, C-107, C-110
C-107
AC708953AF
Connectors: C-202, C-205, C-213
C-205
C-202
C-213 (R)
STEERING WHEEL AUDIO REMOTE CONTROL SWITCH
TSB Revision
CHASSIS ELECTRICAL
54A-524
STEP 1. Using scan tool MB991958, check data list.
Check whether the service data below are normal.
(1) Turn the ignition switch to "ON" position.
(2) Operate each switch of the steering remote control. Check
whether the normal conditions listed below are displayed.
(Refer to
OK: Normal condition is displayed.
Q: Is the check result normal?
YES : Replace the radio and CD player.
NO : Go to Step 2.
STEP 2. Check the steering wheel audio remote control
switch.
Remove the steering wheel audio remote control switch. Then
check continuity between the switch terminals.
Q: Is the steering wheel audio remote control switch in
good condition?
YES : Go to Step 3.
NO : Replace the steering wheel audio remote control
switch.
Item No.
Item name
Normal
condition
Item 1
RADIO remoto SW (SEEK-)
ON
Item 2
RADIO remoto SW (SEEK+)
ON
Item 3
RADIO remoto SW (MODE)
ON
Item 4
RADIO remoto SW (VOL-)
ON
Item 5
RADIO remoto SW (VOL+)
ON
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
Switch Position
Tester
Connection
Measurement Value
No push
2
− 4
Approximately 71 k
Ω
Mode
Approximately 270
Ω
CH up
Approximately 740
Ω
CH down
Approximately 1.3 k
Ω
VOL up
Approximately 2.1 k
Ω
VOL down
Approximately 3.1 k
Ω
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