Vehicles With Radio and CD Player

Inspection Procedure 4: When the speech switch is pressed, the voice information is not output. [Vehicles with radio and CD player]

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














TECHNICAL DESCRIPTION (COMMENT)

If the voice information is not sent when the speech switch is pushed, the communication between the radio and CD player, and the hands free module, or the communication between the radio and CD player, and the steering wheel voice control switch, the hands free module, or the steering wheel voice control switch may have a problem.

TROUBLESHOOTING HINTS

- The radio and CD player may be defective.
- The steering wheel audio remote control switch may be defective.
- The steering wheel voice control switch may be defective.
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check the diagnosis mode

Check if the hands free module can be switched to the diagnosis mode.(Refer to Diagnosis Mode [Vehicles With Radio and CD Player].)

Q. Is the check result normal?

YES Go to Step 2.
NO Perform Inspection Procedure 5 "DIAGNOSIS MODE cannot be made an entry."(Refer to Inspection Procedure 5 [Vehicles With Radio and CD Player].)
STEP 2. Operation check of the steering wheel audio remote control switch

Check that the radio and CD player can be operated by the steering wheel audio remote control switch.

Q. Is the check result normal?

YES Go to Step 3.
NO Troubleshoot the steering wheel audio remote control switch. (Refer to Inspection Procedure 1)
STEP 3. Check the steering wheel voice control switch.

Check the continuity of the steering wheel voice control switch. (Refer to steering wheel voice control switch inspection. Component Tests and General Diagnostics)

Q. Is the check result normal?

YES Go to Step 4.
NO Replace the steering wheel voice control switch.
STEP 4. Check the steering wheel audio remote control switch.

Check the continuity of the steering wheel audio remote control switch.
(Refer to steering wheel audio remote control switch inspection Component Tests and General Diagnostics.)

Q. Is the check result normal?

YES Go to Step 5.
NO Replace the steering wheel audio remote control switch.
STEP 5. Check the wiring harness between steering wheel audio remote control switch connector C-213 (terminal 3) and steering wheel voice control switch connector C-206 (terminal 3).

- Check the communication lines for open circuit and short circuit.

Q. Is the wiring harness between steering wheel audio remote control switch connector C-213 (terminal 3) and steering wheel voice control switch connector C-206 (terminal 3) in good condition?

YES Go to Step 6.
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 6. Check clock spring connector C-202 for loose, corroded or damaged terminals, or terminals pushed back in the connector

Q. Is clock spring connector C-202 in good condition?

YES Go to Step 7.
NO Repair or replace the damaged component(s). Harness Connector Inspection.
STEP 7. Check the harness wire between clock spring connector C-202
(terminal 4) and steering wheel voice control switch connector C-206 (terminal 2).

- Check the communication lines for open circuit and short circuit.

Q. Is the wiring harness between clock spring connector C-202 (terminal 4) and steering wheel voice control switch connector C-206 (terminal 2) in good condition?

YES Go to Step 8.
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 8. Temporarily replace the steering wheel voice control switch, and check the trouble symptom.

Q. Is the check result normal?

YES Replace the steering wheel voice control switch.
NO Replace the radio and CD player.