Inspection Procedure 4: Audio illuminations does not work normally.

caution

Before replacing the multivision display ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM

If the tail lamps illuminate, illumination signal is sent from the ETACS-ECU to the multivision display. This switches the illumination of the multivision display from day mode to night mode. If the mode is not switched, the illumination signal line, the ETACS-ECU or the multivision display may be defective.

PROBABLE CAUSES

Malfunction of multivision display
Malfunction of ETACS-ECU
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the multivision display setting.

(1)Start the multivision display.

(2)On the "Home" screen, to select "Day/Night Setting."

Q. Is it set to "Auto"?

	Go to Step 2.

	Set "Day/Night Setting" to "Auto."

STEP 2. Check the illumination.

When the tail lamps are turned on, check whether the illumination other than the multivision display is turned on.

Q. Is the check result normal?

	Go to Step 3.

	Check the rear combination lamp troubleshooting.

STEP 3. Check of short to power supply, short to earth and open circuit in ILL+ line between smartphone link display audio connector and ETACS-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. Combination meter illumination check.

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

Q. Is the check result normal?

	Go to Step 5.

	Diagnose the combination meter.

STEP 5. Check of short to power supply, short to earth, and open circuit in ILL- line between smartphone link display audio connector and combination meter.

Q. Is the check result normal?

	Go to Step 6.

	Repair the connector(s) or wiring harness.

STEP 6. Substitute the ETACS-ECU with good one, and check the trouble symptom.

Substitute the ETACS-ECU with good one. When the tail lamps illuminate, check that the illumination of the multivision display is switched from day mode to night mode.

Q. Is the check result normal?

	Replace the ETACS-ECU.

	Replace the multivision display (Refer to ).