Inspection Procedure

HINT:

The procedure for each door courtesy switch circuit is the same. First, inspect the suspected door courtesy switch circuit.

1. READ VALUE OF INTELLIGENT TESTER (DOOR COURTESY LIGHT SWITCH) 
   1. Check the DATA LIST for proper functioning of the transistor relay.

      Main body ECU 

      MAIN BODY ECU DATA LIST
      
      

      Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
      D DOR CTY SW	Driver door courtesy switch signal / ON or OFF	ON: Driver's door is open OFF: Driver's door is closed	-
      P DOR CTY SW	Passenger door courtesy switch signal / ON or OFF	ON: Passenger's door is open OFF: Passenger's door is closed	-
      Rr DOR CTY SW	Rear door courtesy switch signal / ON or OFF	ON: Either right or left door is open OFF: Both the right and left doors are closed	-

   OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

   NG : GO TO NEXT STEP 

2. CHECK DRIVER SIDE JUNCTION BLOCK (BODY ECU) 
   1. Disconnect the 1D junction block connector.
   2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION - SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      1D-21 (DCTY) - Body ground	Driver door is open	Below 1
      	Driver door is closed	10 k or higher
      1D-24 (PCTY) - Body ground	Front passenger door is open	Below 1
      	Front passenger door is closed	10 k or higher
      1D-20 (RCTY) - Body ground	Rear RH door is open	Below 1
      	Rear RH door is closed	10 k or higher
      1D-5 (RCTY) - Body ground	Rear LH door is open	Below 1
      	Rear LH door is closed	10 k or higher

      Fig 1: Checking Driver Side Junction Block (Body ECU)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

   NG : GO TO NEXT STEP 

3. INSPECT DOOR COURTESY LIGHT SWITCH 
   1. Remove the courtesy light switch.
   2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION - SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      1 - Body ground	OFF	10 k or higher
      	ON	Below 1

      Fig 2: Inspecting Door Courtesy Light Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE DOOR COURTESY LIGHT SWITCH 

   OK : REPAIR OR REPLACE HARNESS AND CONNECTOR (EACH COURTESY SWITCH CIRCUIT)