Inspection Procedure 1

INSPECTION PROCEDURE 1: Power of radio and CD player does not turn ON when the ignition switch is in the "ACC" position or "ON" position.

Radio And CD Player Supply Circuit Part 1:

Radio And CD Player Supply Circuit Part 2:

CIRCUIT OPERATION
Power is supplied to the radio and CD player when the ignition switch is in the "ACC" position or "ON" position. When the previous ignition switch is in the "OFF" position by battery power, the "ON" or "OFF" state of the radio and CD player is saved.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty radio and CD player power supply circuit system.


TROUBLESHOOTING HINTS
- Damaged wiring harness or connector.
- Malfunction of the radio and CD player.

DIAGNOSIS

Required Special Tool:
- MB991223: Harness set

STEP 1. Check to see that the power turns ON when the power switch is turned ON.

1. Turn the ignition switch to "ACC" position.
2. Turn ON the radio and CD player power switch.

Q: Is it possible to put the radio and CD player power in the "ON" position?

YES: Go to Step 2.

NO: Go to Step 5.





STEP 2. Check radio and CD player connector C-103 for damage.

Q:Are radio and CD player connector C-103 in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. If the power switch is turned on, the radio and CD player should operate normally.










STEP 3. Check the wiring harness between radio and CD player connector C-103 (terminal 11) and battery.

NOTE: Also check intermediate connector C-129 and joint connector (1) C-05. If intermediate connector C-129 or joint connector (1) C-05 are damaged, repair or replace the connector as described in Harness Connector Inspection.

Q:Are the wiring harness between radio and CD player connector C-103 (terminal 11) and battery in good condition?

YES: Go to Step 4.

NO: Repair the wiring harness. If the power switch is turned on, the radio and CD player should operate normally.

STEP 4. Check the assembling state of the radio and CD player.

NOTE: The radio and CD player are grounded to the instrument panel center reinforcement directly.

Q:Are the radio and CD player installed correctly?

YES: Repair or replace the radio and CD player. If the power switch is turned on, the radio and CD player should operate normally.

NO: Install properly. If the power switch is turned on, the radio and CD player should operate normally.

STEP 5. Measure at radio and CD player connector C-103 in order to check the battery circuit of power supply system to the radio and CD player (ignition switch ACC).




1. Disconnect radio and CD player connector C-103, and measure at the wiring harness side.
2. Turn the ignition switch to "ACC" position.




3. Measure the voltage between terminal 10 and ground by backprobing.
- The measured value should be approximately 12 volts (battery positive voltage).

Q:Does the measured voltage correspond with this range?

YES: Go to Step 8.

NO: Go to Step 6.




STEP 6. Check radio and CD player connector C-103 for damage.

Q:Are radio and CD player connector C-103 in good condition?

YES: Go to Step 7.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. If the power switch is turned on, the radio and CD player should operate normally.








STEP 7. Check the wiring harness between radio and CD player connector C-103 (terminal 10) and ignition switch (ACC).

NOTE: Also check intermediate connector C-129 and joint connector C-101. If intermediate connector C-129 or joint connector C-101 are damaged, repair or replace the connector as described in Harness Connector Inspection.

Q:Are the wiring harness between radio and CD player connector C-103 (terminal 10) and ignition switch (ACC) in good condition?

YES: There is no action to be taken.

NO: Repair the wiring harness. If the power switch is turned on, the radio and CD player should operate normally.

STEP 8. Check the assembling state of the radio and CD player.

NOTE: The radio and CD player are grounded to the instrument panel center reinforcement directly.

Q:Are the radio and CD player installed correctly?

YES: Repair or replace the radio and CD player. If the power switch is turned on, the radio and CD player should operate normally.

NO: Install properly. If the power switch is turned on, the radio and CD player should operate normally.