Scuff Plate Light Circuit

LIGHTING (INT): LIGHTING SYSTEM: Scuff Plate Light Circuit
- Scuff Plate Light Circuit

DESCRIPTION

The scuff plate lights turn on when a door is opened, and turn off when the door is closed. This illumination setting can be canceled using the overhead J/B switch.

In addition, the scuff plate lights blink while the theft deterrent system is sounding an alarm.

The turning on and off of the scuff plate lights is controlled by the main body ECU LH based on various signals received through BEAN communication.

The main body ECU LH includes a MOS-FET (Metal Oxide Semiconductor - Field Effect Transistor) circuit that fades the scuff plate lights in and out by duty control.

This MOS-FET circuit has an overheat protection function as a fail-safe. If the main body ECU LH becomes excessively hot, the scuff plate lights turn off and remain off.

Normal operation will resume when the conditions required to turn on the scuff plate lights are met again.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Body No. 3 / Active Test.

(e) Check that the scuff plate lights operates.

Body No. 3 (Main Body ECU LH)





OK:

The scuff plate light LH and RH come on.

HINT
The scuff plate lights RH and LH share the same power source. If either of the lights does not come on, there may be a problem in the part of the circuit that relates to that light. Therefore, inspect that part of the circuit.

NG -- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - SCUFF PLATE LIGHT)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Interior Lighting System

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - SCUFF PLATE LIGHT)

(a) Disconnect the LA main body ECU LH connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)