Inspection Procedure 10: The illumination of the switches on the multivision display cannot be adjusted by using the rheostat.

caution

Whenever the multivision display is replaced, ensure that the power supply circuit and the earthing circuit are normal. (Check that the voltage is 10 V or more.)
Whenever the multivision display is replaced, select "Select Model" on the dealer mode screen.

COMMENTS ON TROUBLE SYMPTOM

When the rheostat knob is operated, the combination meter will send "ILL-" signal to the multivision display accordingly. The illumination on the multivision display mechanical switches will be changed according to this signal. If the switch illumination is not changed, the wiring harness, connector(s), the multivision display or the combination meter may have a problem.

PROBABLE CAUSES

Damaged harness wires and connectors
The multivision display may be defective
The combination meter may be defective

DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply, short to earth, and open circuit in ILL- line between multivision display connector and combination meter.

Q. Is the check result normal?

Go to Step 2.

Repair the connector(s) or wiring harness.

STEP 2. Retest the system.

When the rheostat knob is operated with the mechanical switch illuminated, the illumination should be changed.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

Replace the multivision display.