THEFT DETERRENT SYSTEM Engine Hood Courtesy Switch Circuit

DESCRIPTION

• The engine hood courtesy switch is built into the hood lock. This switch turns on when the engine hood is opened and turns off when the engine hood is closed.

WIRING DIAGRAM

*a	HDCY
*b	Hood Lock Assembly
*c	(Engine Hood Courtesy Switch)
*d	Front Light ECU

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER (ENGINE HOOD COURTESY SWITCH)

   
   

   1. Using the intelligent tester, read the Data List.

      
      

      1. Intelligent tester

         Body No. 5

         Tester Display	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
         Hood Courtesy Switch	Engine hood courtesy switch / ON or OFF	ON: Engine hood is open OFF: Engine hood is closed	-

         OK
         ON (engine hood is open) appears on screen.

   
   

   OK

   REPLACE FRONT LIGHT ECU (FRONT CONTROLLER)

   NG

2. INSPECT HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)

   

   for LHD

   *1	Component without harness connected: (Hood Lock Assembly)
   *2	UNLOCK Position
   *3	LOCK Position

   
   

   1. for LHD:

      
      

      1. Remove the hood lock Click here.

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition 1 - 2 UNLOCK position Below 1 Ω 1 - 2 LOCK position 10 kΩ or higher

      

      for RHD

      *1	Component without harness connected: (Hood Lock Assembly)
      *2	UNLOCK Position
      *3	LOCK Position

   2. for RHD:

      
      

      1. Remove the hood lock Click here.

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

         Standard resistance
         Tester Connection Switch Condition Specified Condition 1 - 2 UNLOCK position Below 1 Ω 1 - 2 LOCK position 10 kΩ or higher

   
   

   NG

   REPLACE HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH)

   OK

3. CHECK HARNESS AND CONNECTOR (FRONT LIGHT ECU - HOOD LOCK AND BODY GROUND)

   

   *1	Front view of wire harness connector: (to Front Light ECU)
   *2	HDCY
   *3	Front view of wire harness connector: (to Hood Lock)

   
   

   1. Disconnect the B14 ECU connector.

   2. Disconnect the B7 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition B14-21 (HDCY) - B7-2 Always Below 1 Ω B7-1 - Body ground Always Below 1 Ω B14-21 (HDCY) or B7-2 - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE FRONT LIGHT ECU (FRONT CONTROLLER)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR