THEFT DETERRENT SYSTEM (w/ Intrusion Sensor) Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is installed together with the hood lock. This switch turns on when the engine hood is opened and turns off when the engine hood is closed.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the intelligent tester on.

   4. Select the item below in the Data List and read the display on the intelligent tester.

      Main Body

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

      OK
      The indicator on the intelligent tester switches between ON and OFF in accordance with the engine hood courtesy switch status.

   
   

   NG

   INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

   
   

   1. Disconnect the 2F instrument panel junction block assembly and A main body ECU (multiplex network body ECU) connectors.

      

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

      Standard Resistance
      Tester Connection Condition Specified Condition 2F-23 - A-20 (HCTY) Always Below 1 Ω

      Text in Illustration

      *1

      Component without harness connected (Instrument Panel Junction Block Assembly)

      *2

      Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

   
   

   NG

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

   OK

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

   
   

   1. for LHD:

      
      
      1. 

         Text in Illustration

         *1	Component without harness connected (Hood Lock Assembly (Engine Hood Courtesy Switch))
         *2	Unlock
         *3	Lock

         Remove the hood lock assembly Click here.

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

         Standard Resistance
         Tester Connection Switch Condition Specified Condition A9-1 (E) - A9-2 (+) Unlocked Below 1 Ω Locked 10 kΩ or higher

   2. for RHD:

      
      
      1. 

         Text in Illustration

         *1	Component without harness connected (Hood Lock Assembly (Engine Hood Courtesy Switch))
         *2	Unlock
         *3	Lock

         Remove the hood lock assembly Click here.

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

         Standard Resistance
         Tester Connection Switch Condition Specified Condition A9-1 (E) - A9-2 (+) Unlocked Below 1 Ω Locked 10 kΩ or higher

   
   

   NG

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

   OK

4. CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND)

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Hood Lock Assembly (Engine Hood Courtesy Switch))

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

      Standard Resistance
      Tester Connection Condition Specified Condition A9-1 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - MAIN BODY ECU)

   
   

   1. Reconnect the 2F instrument panel junction block assembly connector.

      

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

      Standard Resistance
      Tester Connection Condition Specified Condition A9-2 (+) - A-20 (HCTY) Always Below 1 Ω A9-2 (+) - Body ground Always 10 kΩ or higher

      Text in Illustration

      *1

      Front view of wire harness connector (to Hood Lock Assembly (Engine Hood Courtesy Switch))

      *2

      Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here