18 - Inspection Procedure

Preset Station are Erased

Radio And CD Player Power Supply Circuit:

CIRCUIT OPERATION
The power is constantly supplied to the radio and CD player.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty radio and CD player memory backup 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 memory backup power supply circuit by back probing.

1. Do not disconnect radio and CD player connector C-103.
2. Measure the voltage between terminal number 11 and ground by backprobing.

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

YES: Repair or replace the radio and CD player. Check that a memory is retained.

NO: Go to Step 2.




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

Q: Is harness connector C-103 in good condition?

YES: Go to Step 3.

NO: Repair or replace it. Refer to Harness Connector Inspection. Check that a memory is retained.










STEP 3. Check the harness wires between radio and CD player connector C-103 and battery.

NOTE: After inspecting intermediate connector C-129 and joint connector C-05, inspect the wire. If intermediate connector C-129 and joint connector C-05 are damaged, repair or replace them. Refer to Harness Connector Inspection.

Q: Are the harness wires between connector C-103 and battery in good condition?

YES: Repair them. Check that a memory is retained.

NO: Repair or replace the radio and CD player. Check that a memory is retained.