LIGHTING SYSTEM Interior Light Auto Cut Circuit

DESCRIPTION

When battery saving control operates while the interior lights are on, the main body ECU (multiplex network body ECU) opens the DOME relay to turn off the lights.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST 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 Electrical / Main Body / Active Test.

   5. Check that the relay operates.

      Main Body

      Tester Display	Test Part	Control Range	Diagnostic Note
      Relay for Interior Light Auto Cut Function	Light cut relay (DOME relay)	ON/OFF	Any interior light comes on. ON: Light goes off OFF: Light turns on

      OK
      DOME relay operates.

   
   

   NG

   INSPECT DOME RELAY Click here

   OK

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

2. INSPECT DOME RELAY

   
   

   1. Remove the DOME relay from the No. 1 relay block assembly.

   2. 

      Text in Illustration

      *1	Component without harness connected (DOME relay)

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

      Standard Resistance
      Tester Connection Condition Specified Condition 3 - 5 Voltage is not applied between terminals 1 and 2 10 kΩ or higher 3 - 5 Voltage is applied between terminals 1 and 2 Below 1 Ω

   
   

   NG

   REPLACE DOME RELAY

   OK

3. CHECK HARNESS AND CONNECTOR (DOME RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   1. Disconnect the F12 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 Relay terminal 1 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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