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 Assembly)

PROCEDURE

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

   
   

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

      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) and OFF (engine hood is closed) appear on screen according to condition of engine hood.

   
   

   OK

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

   NG

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

   
   
   1. 

      *1	Unlock Position
      *2	Lock Position

      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 - HOOD LOCK ASSEMBLY AND BODY GROUND)

   
   
   1. 

      Text in Illustration

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

      Disconnect the H81 ECU connector.

   2. Disconnect the A44 lock connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H81-11 (HCTY) - A44-2 Always Below 1 Ω A44-1 - Body ground Always Below 1 Ω H81-11 (HCTY) or A44-2 - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR