STOP AND START SYSTEM(for 1AD-FTV) Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine stop and start ECU detects open/close of the engine hood based on a signal received from the engine hood courtesy switch that is built into the hood lock assembly.

• The engine stop and start ECU prohibits starting of the engine by stop and start control and stalls the engine if the clutch pedal is depressed with the engine hood open while the engine is stopped by stop and start control.

• The engine stop and start ECU permits starting of the engine by stop and start control if the engine hood is opened with the clutch pedal depressed while the engine is stopped by stop and start control.

WIRING DIAGRAM

PROCEDURE

1. READ VALUE USING GTS (HOOD COURTESY SWITCH)

   Note

   Before performing this step, check that the engine hood can be opened by pulling the hood lock control cable.

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Stop and Start / Data List / Hood Courtesy Switch.

      
      Powertrain > Stop and Start > Data List

      Tester Display
      Hood Courtesy Switch

   5. Read the value displayed on the GTS when the engine hood is opened and closed.

      OK
      Tester Display Condition Normal Condition Hood Courtesy Switch Engine hood is closed ON Engine hood is open OFF

      Result
      Proceed to NG OK

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

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

   
   

   1. Inspect the engine hood courtesy switch (hood lock assembly).

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE HOOD LOCK ASSEMBLY Click here

   OK

3. CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - BODY GROUND)

   
   

   1. Disconnect the A50 engine hood courtesy switch (hood lock assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A50-2 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY))

   
   

   1. Disconnect the A66 engine stop and start ECU connector.

   2. Disconnect the A50 engine hood courtesy switch (hood lock assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A66-7 (BNT1) - A50-1 (+) Always Below 1 Ω A66-7 (BNT1) - Body ground Always 10 kΩ or higher A50-1 (+) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR