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	Hood Lock Assembly (Engine Hood Courtesy Switch)
*b	Main Body ECU (Instrument Panel Junction Block)

PROCEDURE

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

   
   

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

      Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Hood Courtesy SW	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 MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

   NG

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

   

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

   
   

   1. Remove the hood lock Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 - 2 Unlock position 10 kΩ or higher 1 - 2 Lock position Below 1 Ω

   
   

   NG

   REPLACE HOOD LOCK ASSEMBLY (ENGINE HOOD COURTESY SWITCH) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [INSTRUMENT PANEL JUNCTION BLOCK] - HOOD LOCK AND BODY GROUND)

   

   Text in Illustration

   *1	Front view of wire harness connector (to Main Body ECU [Instrument Panel Junction Block])
   *2	Front view of wire harness connector (to Hood Lock)

   
   

   1. Disconnect the D81 ECU connector.

   2. Disconnect the A33 switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition D81-11 (HCTY) - A33-2 Always Below 1 Ω A33-1 - Body ground Always Below 1 Ω D81-11 (HCTY) or A33-2 - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR