Inspection Procedure 3: When the speech switch is pressed, the voice information is output, but the voice recognition is not performed. < Vehicles with radio and CD player >: Diagnosis
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- STEP 1. Check the diagnosis mode
- Check if the microphone check result "MIC OK" is displayed on the diagnosis mode of hands free module. (Refer to DIAGNOSIS MODE < VEHICLES WITH DISPLAY AUDIO > .)
Q: Is the check result normal?
- YES: Go to Step 4.
- NO: Go to Step 2.
- STEP 2. Check hands free module connector C-110 and microphone unit D-03 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are hands free module connector C-110 and microphone unit connector D-03 in good condition?
- YES: Go to Step 3.
- NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
- STEP 3. Check the wiring harness between hands free module connector C-110 (terminal 14, 28) and microphone unit connector D-03 (terminal 2, 1).
- Check the signal lines for open circuit and short circuit.
NOTE: Also check intermediate connectors C-130 and C-148 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-130 and C-148 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .Q: Is the wiring harness between hands free module connector C-110 (terminal 14, 28) and microphone unit connector D-03 (terminal 2, 1) in good condition?
- YES: Go to Step 4.
- 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 4. Replace the microphone unit temporarily, and check the trouble symptom.
Q: Is the check result normal?
- YES: Replace the microphone unit.
- NO: Go to Step 5.
- STEP 5. Replace the hands free module temporarily, and check the trouble symptom.
Q: Is the check result normal?
- YES: Replace the hands free module.
- NO: The trouble can be an intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)