Inspection Procedure 4

INSPECTION PROCEDURE 4: The System does not Recognize the Remote Controlled Radio Switch (LH) Only.[Vehicles with Audio Amplifier]

CIRCUIT OPERATION
Refer to Inspection Procedure 2 Inspection Procedure 2

TECHNICAL DESCRIPTION (COMMENT)
Refer to Inspection Procedure 2 Inspection Procedure 2

TROUBLESHOOTING HINTS
Refer to Inspection Procedure 2 Inspection Procedure 2

DIAGNOSIS

Required Special Tool:
- MB991223: Harness set

STEP 1. Measure the resistance at remote controlled radio switch (LH).

1. Remove the airbag module assembly.
2. Disconnect remote controlled radio switch (RH) connector C-311, and measure at the remote controlled radio switch (LH) connector side.







3. Measure the resistance by operating the remote controlled radio switch (LH) in each position.







Q: Is the resistance at the left remote controlled radio switch normal?

YES : Go to Step 2.

NO : Replace the remote controlled radio switch (LH).

STEP 2. Check the radio switch (LH) connector C-311 and clock spring connector C-303 for loose, corroded or damaged terminals, or terminals pushed back in the connector.







Q: Is remote controlled radio switch (LH) connector C-311 and clock spring connector C-303 in good condition?

YES : Go to Step 3.

NO : Repair or replace the connector. The remote controlled radio switch (LH) should work normally.

STEP 3. Check the wiring harness between remote controlled radio switch connector C-311 (terminals1 and 2) and clock spring connector C-303 (terminals 4 and 5).







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

Q: Are the wiring harness between remote controlled radio switch connector C-311 (terminals 1 and 2) and clock spring connector C-303 (terminals 4 and 5) in good condition?

YES : No action to be taken.

NO : Repair the wiring harness. The remote controlled radio switch (LH) should work normally.