01 - Inspection Procedure

When Power Switch is Turned "ON," No Power is Available

Radio And CD Player Power Supply Circuit:

CIRCUIT OPERATION
Power is supplied to the radio and CD player when the ignition switch is at the "ACC" or "ON" position.

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

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

DIAGNOSIS

Required Special Tool:
- MB991223: Harness set




STEP 1. Check the radio and CD player power supply circuit by backprobing.
1. Do not disconnect radio and CD player connector C-103.
2. Turn the ignition switch to the "ACC" position.
3. Measure the voltage between terminal 10 and ground by backprobing.

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

YES: Go to Step 4.

NO: Go to Step 2.




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 it. Refer to Harness Connector Inspection. If the power switch is turned on, the radio and CD player should operate normally.










STEP 3. Check the harness wires between radio and CD player connector C-103 and ignition switch (ACC).

NOTE: After inspecting intermediate connector C-129 and junction block connector C-19, inspect the wire. If intermediate connector C-129 and junction block connector C-19 are damaged, repair or replace them. Refer to Harness Connector Inspection.

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

YES: There is no action to be taken.

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

STEP 4. Are the radio and CD player installed correctly?

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