Inspection Procedure 2: During The Conversation With The Hands Free Cellular Phone System, The Speaker's Voice Cannot Be Heard By The Other Party: Diagnosis
Required Special Tools:
- MB991223: Harness Set
- MB992006: Extra Fine Probe
- STEP 1. Check the cellular phone.
Check that the cellular phone can be used normally as a unit.
Q: Is it possible to use the cellular phone normally?
YES : Go to Step 2.
NO : Repair or replace the cellular phone.
- STEP 2. Check hands free module connector C-11 and microphone unit connector D-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are hands-free module connector C-11 and microphone unit connector D-04 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-11 and microphone unit connector D-04.
- Check the communication lines for open circuit and short circuit.
- Disconnect hands free module connector C-11 and microphone unit connector D-04, and check the wiring harness.
- Check the wiring harness between hands-free module connector C-11 (terminal 24) and microphone unit connector D-04 (terminal 2)
- Check the wiring harness between hands-free module connector C-11 (terminal 23) and microphone unit connector D-04 (terminal 1)
Q: Is the wiring harness between hands free module connector C-11 and microphone unit connector D-04 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. Temporarily replace the microphone unit, and check the trouble symptom.
Check that the normal conversation is possible with the hands-free system.
Q: Is the normal conversation possible with the hands free system?
YES : Replace the microphone unit.
NO : Replace the hands free module.