THEFT DETERRENT SYSTEM(w/o Entry and Start 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 (Cowl Side Junction Block Assembly LH)

PROCEDURE

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

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / Main Body / Data List.

   5. Read the Data List according to the display on the intelligent tester.

      Main Body

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

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

   
   

   OK

   REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK ASSEMBLY LH)

   NG

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

   
   

   1. for LHD:

      

      Text in Illustration

      *a

      Unlock Position

      *b

      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

   2. for RHD:

      

      Text in Illustration

      *a

      Unlock Position

      *b

      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)

   OK

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

   
   

   1. Disconnect the E30 main body ECU connector.

   2. Disconnect the E1 hood courtesy switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E1-16 (HCTY) - A8-2 Always Below 1 Ω A8-1 - Body ground Always Below 1 Ω E1-16 (HCTY) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK ASSEMBLY LH)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR