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 Power Supply Circuit:

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 ignition is switched on, the radio and CD player will return to the previous state when the ignition was switched off.

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 radio and CD player is energized 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 the radio and CD player 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 connector C-11 for damage.

Q: Is radio and CD player connector C-11 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 harnesses between radio and CD player connector C-11 (terminal 7) and the battery.

NOTE: Also check intermediate connector C-209 and joint connector C-141. If intermediate connector C-02 or joint connector C-141 are damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Are the wiring harnesses between radio and CD player connector C-11 (terminal 7) and the battery in good condition?

YES: Go to Step 4.
NO: Repair the wiring harness(es). If the power switch is turned on, the radio and CD player should operate normally.

STEP 4. Check the installation condition 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 the radio and CD player 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-11 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-11, and measure at the wiring harness side.
2. Turn the ignition switch to "ACC" position.
3. Measure the voltage between terminal 6 and ground. 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-11 for damage.

Q: Is radio and CD player connector C-11 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 harnesses between radio and CD player connector C-11 (terminal 6) and ignition switch (ACC).

NOTE: Also check intermediate connector C-209. If intermediate connector C-209 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Are the wiring harnesses between radio and CD player connector C-11 (terminal 6) and ignition switch (ACC) in good condition?

YES: There is no action to be taken.
NO: Repair the wiring harness(es). If the power switch is turned on, the radio and CD player should operate normally.

STEP 8. Check the installation condition 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 the radio and CD player properly. If the power switch is turned on, the radio and CD player should operate normally.