Mitsubishi Evolution X. Manual — part 1037
HANDS-FREE CELLULAR PHONE SYSTEM
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CHASSIS ELECTRICAL
54A-509
STEP 4. Check clock spring connectors C-202 and C-205
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are clock spring connectors C-202 and C-205 in good
condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component (Refer to
GROUP 00E, Harness Connector Inspection
). The steering remote control switch should
work normally.
STEP 5. Check the clock spring.
Check whether the clock spring is in good condition (Refer to
GROUP 52B
− Driver’s air bag module and clock spring
).
Q: Is the check result normal?
YES : Go to Step 6.
NO : Replace the clock spring.
STEP 6. Check the wiring harness between steering wheel
voice control switch connector C-206 (terminal 4) and
clock spring connector C-202 (terminal 1).
• Check the communication lines for open circuit and short
circuit.
Q: Is the wiring harness between steering wheel
voice-control switch connector C-206 (terminal 4) and
clock spring connector C-202 (terminal 1) in good
condition?
YES : Go to Step 7.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 7. Check combination meter connector C-04 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is combination meter connector C-04 in good
condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component (Refer to
GROUP 00E, Harness Connector Inspection
). The steering remote control switch should
work normally.
HANDS-FREE CELLULAR PHONE SYSTEM
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CHASSIS ELECTRICAL
54A-510
STEP 8. Check the wiring harness between combination
meter connector C-04 (terminal 23) and clock spring
connector C-205 (terminal 6).
• Check the communication lines for open circuit and short
circuit.
Q: Is the wiring harness between combination meter
connector C-04 (terminal 23) and clock spring
connector C-205 (terminal 6) in good condition?
YES : Go to Step 9.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 9. Retest the system
Check whether the illumination of the steering remote control
switch comes on normally.
Q: Doe the illumination of the steering remote control
switch comes on normally?
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 : Replace the steering wheel voice control switch.
HANDS-FREE CELLULAR PHONE SYSTEM
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CHASSIS ELECTRICAL
54A-511
Inspection Procedure 7: Check the hands free module power supply circuit.
CAUTION
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communi-
cation circuit are normal.
.
Hands Free Module Power Supply Circuit
FUSIBLE
LINK
36
HANDS FREE
MODULE
RELAY BOX
ENGINE
COMPARTMENT
AC708951BT
Connector: C-11
AC708972BA
Connectors: C-307, C-317
ETACS-ECU
C-307 (B)
C-317
HANDS-FREE CELLULAR PHONE SYSTEM
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CHASSIS ELECTRICAL
54A-512
CIRCUIT OPERATION
The power supply to the hands free module is pro-
vided by the fusible link (36).
.
TECHNICAL DESCRIPTION (COMMENT)
If the hands free cellular phone system don't work,
power supply and ground system to the hands free
module, or the hands free module itself may be
defective.
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• The hands free module may be defective
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Check hands free module connector C-11 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is hands free module connector C-11 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component (Refer to
GROUP 00E, Harness Connector Inspection
STEP 2. Check the ground circuit to the hands free
module. Measure the resistance at hands free module
connector C-11.
(1) Disconnect hands-free module connector C-11, and
measure at the wiring harness side.
(2) Measure the resistance value between terminal 15 and
ground.
OK: The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 4.
NO : Go to Step 3.
AC709322 BK
Harness side: C-11
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