Inspection Procedure 3: When the speech switch is pressed, the voice guide is output, but the voice recognition is not performed.
| caution | Before replacing the hands
free-ECU, ensure that the power supply circuit, the earth circuit and the communication circuit
are normal. |
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- The hands free-ECU may be defective.
- The microphone unit may be defective.
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE |
STEP 1. Retest the system |
| Close all the windows to suppress external noise as much as possible. Then check whether
the voice recognition operates normally when you utter a word as close to the microphone unit as
possible |
Q.
Is the check result normal?
|
 Diagnosis complete. |
|
 Go to Step 2 |
|
STEP 2. Check the diagnosis mode |
Check if the microphone check result "HFM MIC Check" is displayed on the diagnosis mode
of hands free-ECU. (Refer to  <Vehicles with 1CD audio>, <Vehicles
with display audio> or <Vehicles with MMCS>.) |
Q.
Is the check result normal?
|
| Go to Step 5 |
|
| Go to Step 3 |
|
STEP 3. Connector check: E-07 microphone unit connector, C-218 hands free ECU connector |
Q.
Is the check result normal?
|
| Go to Step 4. |
|
| Repair the defective connector. |
|
STEP 4. Check the wiring harness between C-218 hands free ECU connector terminal No.14, 28 and E-07 microphone unit connector terminal No.2, 1. |
|
|
Q.
Is the check result normal?
|
| Go to Step 5. |
|
| Repair the wiring harness. |
|
STEP 5. Replace the microphone unit temporarily, and check the trouble symptom. |
Q.
Is the check result normal?
|
| Replace the microphone unit. |
|
| Go to Step 6 |
|
STEP 6. Replace the hands free-ECU temporarily, and check the trouble symptom. |
Q.
Is the check result normal?
|
| Replace the hands free-ECU. |
|
| The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use
Troubleshooting/inspection Service Points, How to Cope with Intermittent Malfunction ). |
|