Inspection Procedure 1: Power of the Radio and CD Player does not Turn ON When The Ignition Switch Is In the "ACC" Position or "ON" Position.


caution Before replacing the radio and CD player, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.










OPERATION



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunctions of radio and CD player
  • Malfunction of the ETACS-ECU
  • Option coding information inconsistency
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. ETACS-ECU coding data check
(1)Operate the M.U.T.-III to read the ETACS-ECU option coding information (Refer to GROUP 00 - Coding Table ).
(2)Check that the "AUDIO" is set to "Present."

Q. Is the check result normal?
Go to Step 2.
Operate the M.U.T.-III to set the option coding "AUDIO" to "Present," and check the trouble symptom.

STEP 2. M.U.T.-III other system diagnosis code
Check if the diagnosis code is set to the ETACS-ECU.

Q. Is the check result normal?
Troubleshoot the ETACS-ECU. Refer to ETACS-ECU - Troubleshooting .
Go to Step 3.

STEP 3. M.U.T.-III other system data list
Check the input signal of ACC relay.

  • Turn the ignition switch to the ACC position.
Item No.
 Item name
 Normal condition
Item 288
 ACC switch
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 4.
Refer to ETACS - Input Signal Procedure 1 "The ignition switch (ACC) signal is not sent to the ETACS-ECU" .

STEP 4. Connector check: C-103 radio and CD player connector

Q. Is the check result normal?
Go to Step 5.
Repair the defective connector.

STEP 5. Voltage measurement at C-103 radio and CD player connector.
(1)Disconnect the connector, and measure at the wiring harness-side connector.
(2)Voltage between C-103 radio and CD player connector terminal No.30 and the body earth
OK: System voltage

Q. Is the check result normal?
Go to Step 7.
Go to Step 6.

STEP 6. Check the wiring harness between C-103 radio and CD player connector terminal No.30 and fusible link No.36 <PETROL> or No.38 <DIESEL>

  • Check the power supply line (battery power supply) for open circuit.

Q. Is the check result normal?
Go to Step 7.
Repair the wiring harness.

STEP 7. Retest the system
Check if the radio and CD player power is turned ON.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the radio and CD player.