LIGHTING SYSTEM IG Signal Circuit

Click here

DESCRIPTION

• The main body ECU receives the IG signal to control the illuminated entry system.

• The main body ECU receives the IG signal to control the automatic light control system and light turn-off system.

Click here

INSPECTION PROCEDURE

Click here

PROCEDURE

1. Click here

   INSPECT SMART ENTRY AND START SYSTEM (POWER SOURCE MODE)

   Tip:

   (Click here)

   OK
   Power source mode operates normally.

   
   
   • OKClick here
   • NGClick here
2. Click here

   READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / Main Body / Data List.

   5. Read the display on the intelligent tester.

      Table 1. Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      IG SW	Engine switch IG signal / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-

      OK
      Normal conditions listed above are displayed.

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT FUSE (LH ECU-IG)

   
   

   1. Remove the LH ECU-IG fuse from the instrument panel junction block LH.

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

      Standard Resistance
      Tester Connection Condition Specified Condition LH ECU-IG Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)

   
   
   1. 

      Disconnect the 4M main body ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition 4M-1 - Body ground Always 11 to 14 V

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND)

   
   
   1. 

      Disconnect the 4A main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4A-5 - Body ground Always Below 1 Ω

   
   
   • OKClick here
   • NGClick here
6. Click here

   CHECK HARNESS AND CONNECTOR (MAIN BODY ECU CONNECTOR G48 - MAIN BODY ECU CONNECTOR 4D)

   
   
   1. 

      Disconnect the G48 main body ECU connector.

   2. Disconnect the 4D main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 4D-11 - G48-3 (IG1D) Always Below 1 Ω 4D-11 - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

9. Click here

   REPLACE FUSE

10. Click here

    REPLACE MAIN BODY ECUClick here

11. Click here

    GO TO SMART ENTRY AND START SYSTEMClick here