Lighting System Engine Switch Illumination Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING TECHSTREAM

INSPECT ENGINE SWITCH

CHECK HARNESS OR CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)

DESCRIPTION

1. Light control switch is in TAIL position.
   

1. Interior light is turned on by the illuminated entry system.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

4. Enter the following menus: Body Electrical / Main Body / Active Test.
   

5. Check the operation.
   
   

   Main Body (Main Body ECU)

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicator for Lighting	Engine switch illumination (All doors are closed)	ON/OFF	-

   OK:

   Engine switch illumination comes on.
   

1. Remove the engine switch.
   

   
   
   
   

2. Connect a (+) lead from the battery to terminal 11 and a (-) lead to terminal 4 or 5.
   

3. Check that the illumination comes on.
   

   OK:

   Engine switch illumination comes on.
   

1. Disconnect the E51 main body ECU connector.
   

2. Disconnect the E38 engine switch connector.
   

3. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E38-11 (SWIL) - E51-8 (SWIL)	Always	Below 1 Ω
   E38-4 (COM) or E38-5 (GND) - Body ground	Always	Below 1 Ω
   E51-8 (SWIL) - Body ground	Always	10 kΩ or higher