LIGHTING SYSTEM Illumination Circuit

DESCRIPTION

The main body ECU receives information regarding all the door courtesy light switches and door lock position switches, and turns on the room lights.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the intelligent tester on.

   4. Turn the map light switch to the DOOR position.

   5. Close all the doors (all door courtesy light switches turn off).

   6. Enter the following menus: Body / Main Body / Active Test / Illuminated Entry System.

   7. Use the Active Test to check the operation of the illuminated entry system.

      Main Body

      Tester Display	Test Part	Control Range	Diagnostic Note
      Illuminated Entry System	All parts illuminated by illuminated entry system	ON/OFF	-

      OK
      The illuminated entry system operates normally when operating it using the Active Test.

   
   

   NG

   INSPECT MAP LIGHT ASSEMBLY Click here

   OK

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

2. INSPECT MAP LIGHT ASSEMBLY

   
   

   1. 

      Remove the map light assembly Click here.

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

      Standard Resistance

      Tester Connection Switch Condition Specified Condition 7 (+B1) - 6 (CTY) Map light switch off Door switch not in door position 10 kΩ or higher 7 (+B1) - 6 (CTY) Map light switch off Door switch in door position Below 1 Ω 7 (+B1) - 2 (GND) Map light switch off Door switch in on position Below 1 Ω 7 (+B1) - 2 (GND) Map light switch off Door switch not in on position 10 kΩ or higher 7 (+B1) - 2 (GND) Map light switch on Below 1 Ω 7 (+B1) - 3 (RRMP) Map light switch on Door switch not in on position 10 kΩ or higher 7 (+B1) - 3 (RRMP) Map light switch off Door switch not in on position Below 1 Ω

   
   

   NG

   REPLACE MAP LIGHT ASSEMBLY Click here

   OK

3. CHECK HARNESS AND CONNECTOR (MAP LIGHT - MAIN BODY ECU, BATTERY AND BODY GROUND)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Map Light Assembly)
      *2	Front view of wire harness connector (to Main Body ECU)

      Disconnect the DK main body ECU connector.

   2. Disconnect the Q10 map light connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition Q10-7 (+B1) - Body ground Battery saving control (interior light auto cut function) not operating 11 to 14 V

      Standard Resistance
      Tester Connection Condition Specified Condition Q10-6 (CTY) - DK-2 (ILE) Always Below 1 Ω Q10-6 (CTY) - Body ground Always 10 kΩ or higher Q10-2 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. INSPECT NO. 1 ROOM LIGHT ASSEMBLY

   
   

   1. 

      Remove the No. 1 room light assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition 4 (B) - 3 (E) Off 10 kΩ or higher 4 (B) - 2 (CTY) Off Below 1 Ω 4 (B) - 3 (E) On Below 1 Ω 4 (B) - 2 (CTY) On 10 kΩ or higher

   
   

   NG

   REPLACE NO. 1 ROOM LIGHT ASSEMBLY Click here

   OK

5. CHECK HARNESS AND CONNECTOR (NO. 1 ROOM LIGHT - MAP LIGHT, BATTERY AND BODY GROUND)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Map Light Assembly)
      *2	Front view of wire harness connector (to No. 1 Room Light Assembly)

      Disconnect the Q10 map light connector.

   2. Disconnect the Q8 No. 1 room light connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition Q8-4 (B) - Body ground Battery saving control (interior light auto cut function) not operating 11 to 14 V

      Standard Resistance
      Tester Connection Condition Specified Condition Q8-2 (CTY) - Q10-3 (RRMP) Always Below 1 Ω Q8-2 (CTY) - Body ground Always 10 kΩ or higher Q8-3 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)