LIGHTING SYSTEM Ambient Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the ambient lights.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK SYMPTOMS

   
   

   1. Check symptoms.

      Table 1. Result

      Result	Proceed to
      Ambient lights do not illuminate. (for front and rear doors)	A
      Ambient light does not illuminate. (for instrument panel)	B

   
   
   • AClick here
   • BClick here
2. Click here

   PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

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

   5. Check that the ambient lights come on.

      Table 2. Main Body

      Tester Display	Test Part	Control Range	Diagnostic Note
      Interior Illumination Light2	Ambient light (for front and rear doors)	ON/OFF	Power switch is turned off just before performing the Active Test.

      OK
      Ambient lights come on.

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (DOME FUSE - DOOR TRIM BOARD SUB-ASSEMBLY)

   
   

   1. Disconnect the M7 front door trim board sub-assembly LH connector.

   2. Disconnect the L8 front door trim board sub-assembly RH connector.

   3. Disconnect the O3 rear door trim board sub-assembly LH connector.

   4. Disconnect the N3 rear door trim board sub-assembly RH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition M7-1 (+) - Body ground Power switch off 11 to 14 V L8-1 (+) - Body ground Power switch off 11 to 14 V O3-1 (+) - Body ground Power switch off 11 to 14 V N3-1 (+) - Body ground Power switch off 11 to 14 V

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   CHECK HARNESS AND CONNECTOR (DOOR TRIM BOARD SUB-ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   1. Disconnect the H11 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition M7-2 (-) - H11-6 (LED2) Always Below 1 Ω L8-2 (-) - H11-6 (LED2) Always Below 1 Ω O3-2 (-) - H11-6 (LED2) Always Below 1 Ω N3-2 (-) - H11-6 (LED2) Always Below 1 Ω M7-2 (-) - Body ground Always 10 kΩ or higher

   
   
   • OK

     REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   PERFORM ACTIVE TEST USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

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

   5. Check that the ambient lights come on.

      Table 3. Main Body

      Tester Display	Test Part	Control Range	Diagnostic Note
      Interior Illumination Light1	Ambient light (for instrument panel)	ON/OFF	Power switch is turned off just before performing the Active Test.

      OK
      Ambient light come on.

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

   • NGClick here
6. Click here

   INSPECT INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY

   
   

   1. Remove the interior illumination light sub-assembly (Click here).

   2. Inspect the interior illumination light sub-assembly (Click here).

      OK
      Interior illumination light comes on.

   
   
   • OKClick here
   • NG

     REPLACE INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY (Click here)

7. Click here

   CHECK HARNESS AND CONNECTOR (DOME FUSE - INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY)

   
   

   1. Disconnect the H73 interior illumination light sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition H73-5 (RRIL) - Body ground Power switch off 11 to 14 V

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   CHECK HARNESS AND CONNECTOR (INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   1. Disconnect the H11 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H73-3 (-) - H11-5 (LED1) Always Below 1 Ω H73-3 (-) - Body ground Always 10 kΩ or higher

   
   
   • OK

     REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR