Inspection Procedure 1

INSPECTION PROCEDURE 1: When Power Switch is Turned "ON," no Power is Available.

Radio And CD Player or Radio, CD Player And CD Changer Power Supply Circuit:

CIRCUIT OPERATION
Power is supplied to the radio and CD player or radio, CD player and CD changer when the ignition switch is in the "ACC" position or "ON" position. When the ignition is switched on, the radio and CD player or radio, CD player and CD changer or radio, CD player and CD changer will return to the previous state when the ignition was switch off at the last time.

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

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

DIAGNOSIS

Required Special Tool:
- MB991223: Harness set

STEP 1. Check to see that the radio and CD player or radio, CD player and CD changer is energized when the power switch is turned ON.

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

Q: Is the radio and CD player or radio, CD player and CD changer energized when the power switch is turned ON?

YES : Go to Step 2.

NO : Go to Step 5.

STEP 2. Check radio and CD player or radio, CD player and CD changer connector C-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector.







Q: Are radio and CD player or radio, CD player and CD changer connector C-111 in good condition?

YES : Go to Step 3.

NO : Repair or replace the component(s). If the power switch is turned on, the radio and CD player or radio, CD player and CD changer should operate normally.

STEP 3. Check the wiring harness between radio and CD player or radio, CD player and CD changer connector C-111 (terminal 10) and the ignition switch (ACC).







- Check the wiring harness for open circuit and short circuit.







NOTE: Also check intermediate connector C-29 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-29 is damaged, repair or replace it.

Q: Is the wiring harness between radio and CD player or radio, CD player and CD changer connector C-111 (terminal 10) and ignition switch (ACC) 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 or radio, CD player and CD changer should operate normally.

STEP 4. Check the installation condition of the radio and CD player or radio, CD player and CD changer.

NOTE: The radio and CD player or radio, CD player and CD changer are grounded to the deck crossmember directly.

Q: Are the radio and CD player or radio, CD player and CD changer installed correctly?

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

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

STEP 5. Measure at radio and CD player or radio, CD player and CD changer connector C-111 in order to check the battery circuit of power supply system to the radio and CD player or radio, CD player and CD changer (ignition switch ACC).







1. Disconnect radio and CD player or radio, CD player and CD changer connector C-111, and measure at the wiring harness side.
2. Turn the ignition switch to "ACC" position.







3. Measure the voltage between terminal 10 and ground.
- The voltage should measure approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 8.

NO : Go to Step 6.

STEP 6. Check radio and CD player or radio, CD player and CD changer connector C-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector.







Q: Are radio and CD player or radio, CD player and CD changer connector C-111 in good condition?

YES : Go to Step 7.

NO : Repair or replace the damaged component(s). If the power switch is turned on, the radio and CD player or radio, CD player and CD changer should operate normally.

STEP 7. Check the wiring harness between radio and CD player or radio, CD player and CD changer connector C-111 (terminal 10) and ignition switch (ACC).







- Check the wiring harness for open circuit and short circuit.







NOTE: Also check intermediate connector C-29 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-29 is damaged, repair or replace the connector.

Q: Is the wiring harness between radio and CD player or radio, CD player and CD changer connector C-111 (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 or radio, CD player and CD changer should operate normally.

STEP 8. Check the installation condition of the radio and CD player or radio, CD player and CD changer.

NOTE: The radio and CD player or radio, CD player and CD changer are grounded to the deck crossmember directly.

Q: Are the radio and CD player or radio, CD player and CD changer installed correctly?

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

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