Inspection Procedure 4: When The Speech Switch Is Pressed, The Voice Information Is Not Output < Vehicles With MMCS >: Diagnosis

WARNING: This page is about a different variant/trim than selected.

Required Special Tools:

MB991223: Harness Set
MB992006: Extra Fine Probe

STEP 1. Check the multivision display operation.
Display the INFOR screen, and check that the "Mobile Phone" item is displayed.

Q: Is the check result normal?
- YES: Go to Step 2.
- NO: Perform Inspection Procedure 6: "DIAGNOSIS MODE cannot be made an entry. Mobile Phone item is not displayed on the INFOR screen of MMCS." of the troubleshooting (Refer to INSPECTION PROCEDURE 6: DIAGNOSIS MODE CANNOT BE MADE AN ENTRY. MOBILE PHONE ITEM IS NOT DISPLAYED ON THE INFOR SCREEN OF MMCS. < VEHICLES WITH MMCS > ).
STEP 2. Operation check of the steering wheel audio remote control switch
Check that the multivision display can be operated by the steering wheel audio remote control switch.

Q: Is the check result normal?
- YES: Go to Step 3.
- NO: Troubleshoot the steering wheel audio remote control switch. (Refer to STEERING WHEEL AUDIO REMOTE CONTROL SWITCH - LANCER EVOLUTION .)
STEP 3. Check the steering wheel voice control switch.
Check the continuity of the steering wheel voice control switch. (Refer to STEERING WHEEL VOICE CONTROL SWITCH INSPECTION. )

Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Replace the steering wheel voice control switch.
STEP 4. Check the steering wheel audio remote control switch.
Check the continuity of the steering wheel audio remote control switch. (Refer to STEERING WHEEL AUDIO REMOTE CONTROL SWITCH INSPECTION .)

Q: Is the check result normal?
- YES: Go to Step 5.
- NO: Replace the steering wheel audio remote control switch.
STEP 5. Check the wiring harness between steering wheel audio remote control switch connector C-213 (terminal 3) and steering wheel voice control switch connector C-206 (terminal 3).
- Check the communication lines for open circuit and short circuit.
Q: Is the wiring harness between steering wheel audio remote control switch connector C-213 (terminal 3) and steering wheel voice control switch connector C-206 (terminal 3) in good condition?
- YES: Go to Step 6.
- 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 6. Check clock spring connector C-202 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Is clock spring connector C-202 in good condition?
- YES: Go to Step 7.
- NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
STEP 7. Check the harness wire between clock spring connector C-202 (terminal 4) and steering wheel voice control switch connector C-206 (terminal 2).
- Check the communication lines for open circuit and short circuit.
Q: Is the wiring harness between clock spring connector C-202 (terminal 4) and steering wheel voice control switch connector C-206 (terminal 2) in good condition?
- YES: Go to Step 8.
- 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 8. Temporarily replace the steering wheel voice control switch, and check the trouble symptom.
Q: Is the check result normal?
- YES: Replace the steering wheel voice control switch.
- NO: Replace the multivision display.