INSPECTION PROCEDURE 4: When The Speech Switch Is Pressed, The Voice Information Is Not Output - Vehicles With MMCS: Diagnosis
- 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 INSPECTION PROCEDURE 2: STEERING WHEEL AUDIO REMOTE CONTROL SWITCH DOES NOT FUNCTION. < VEHICLES WITH MMCS > .)
- STEP 3. 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 4.
- NO: Replace the steering wheel audio remote control switch.
- STEP 4. Check clock spring connector C-304 and steering wheel audio remote control switch connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Is clock spring connector C-304 and steering wheel audio remote control switch connector C-317 in good condition?
- YES: Go to Step 5.
- NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
- STEP 5. Check the harness wire between clock spring connector C-304 (terminal 2, 3) and steering wheel audio remote control switch connector C-317 (terminal 1, 2).
- Check the communication lines for open circuit and short circuit.
Q: Is the wiring harness between clock spring connector C-304 (terminal 2, 3) and steering wheel audio remote control switch connector C-317 (terminal 1, 2) 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. Temporarily replace the steering wheel audio remote control switch, and check the trouble symptom.
Q: Is the check result normal?
- YES: Replace the steering wheel audio remote control switch.
- NO: Replace the multivision display.