Inspection Procedure 2

INSPECTION PROCEDURE 2: When the SPEECH button is pressed, the voice information is output, but the voice recognition is not performed.

CAUTION:
Before replacing the module, ensure that the power supply circuit and the ground circuit are normal.






















CIRCUIT OPERATION

With the operation of the SPEECH button, the hands-free module starts voice recognition. In addition, the power source is supplied by the hands-free module.

TECHNICAL DESCRIPTION (COMMENT)

If the voice recognition cannot be performed, the interphone microphone or hands-free module may be faulty.

TROUBLESHOOTING HINTS

- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.
- Malfunctions of interphone microphone
- Malfunction of hands free module

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check the interphone microphone.

Refer to Component Tests and General Diagnostics.

Q. Is the check result normal?

YES Go to Step 4.
NO Go to Step 2.
STEP 2. Check hands free module connector C-35 and interphone microphone connector D-51 for loose, corroded or damaged terminals, or terminals pushed back in the connector.













Q. Are hands free module connector C-35 and interphone microphone connector D-51 in good condition?

YES Go to Step 3.

NO Repair or replace the damaged component(s). Harness Connector Inspection.

STEP 3. Check the wiring harness between hands free module connector C-35 (terminal 24, 23) and interphone microphone connector D-51 (terminal 2, 1).













- Check the wiring harness for open circuit and short circuit.





(1)NOTE:
Also check intermediate connector C-27 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-27 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between hands free module connector C-35 (terminal 24, 23) and interphone microphone connector D-51 (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. Temporarily replace the interphone microphone, and check the trouble symptom.

Check that the normal conversation is possible with the hands free cellular phone system.

Q. Is the normal conversation possible with the hands free cellular phone system?

YES Replace the interphone microphone.
NO Replace the hands free module.