Inspection Procedure 4: When the speech switch is pressed, the voice guide is not output. <Vehicles with radio and CD player>
| caution | Before replacing the hands
free-ECU or radio and CD player, ensure that the power supply circuit, the earth circuit and
the communication circuit are normal. |
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- The radio and CD player may be defective.
- The hands free-ECU may be defective.
- The steering wheel remote control switch may be defective.
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE |
STEP 1. Check the diagnosis mode |
Check if the hands free-ECU can be switched to the diagnosis mode. (Refer to  <Vehicles
with 1CD audio> or <Vehicles with display
audio>.) |
Q.
Is the check result normal?
|
 Go to Step 2 |
|
 Perform Inspection Procedure 5 "DIAGNOSIS MODE cannot be made an entry." (Refer
to .) |
|
STEP 2. Operation check of the steering wheel remote control switch (audio remote control switch) |
| Check that the radio and CD player can be operated by the steering wheel remote control
switch. |
Q.
Is the check result normal?
|
| Go to Step 3 |
|
| Troubleshoot the steering wheel remote control switch. |
|
STEP 3. Check the steering wheel remote control switch (speech switch). |
| Check the continuity of the steering wheel remote control switch. (Refer to .) |
Q.
Is the check result normal?
|
| Go to Step 4 |
|
| Replace the steering wheel remote control switch. |
|
STEP 4. Temporarily replace the hands free-ECU, and check the trouble symptom. |
Q.
Is the check result normal?
|
| Replace the hands free-ECU. |
|
| Replace the radio and CD player. |
|