STOP AND START SYSTEM Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine stop and start ECU detects whether the engine hood is open or closed based on a signal received from the engine hood courtesy switch built into the hood lock assembly.

• for Automatic Transmission:




• The engine stop and start ECU prohibits starting of the engine by stop and start control and changes the mode to "stalled" if the engine hood is opened with the shift lever in P, D or S while the engine is stopped by stop and start control.

• for Manual Transmission:




• 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.

   5. According to the display on the GTS, read the Data List.

      
      Powertrain > Stop and Start > Data List

      Tester Display
      Hood Courtesy Switch

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

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

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

   
   

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

      Click here

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

      Click here

      Result
      Proceed to OK NG

   
   

   NG

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

   OK

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

   
   

   1. Disconnect the A34 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 A34-1 - 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 G126 engine stop and start ECU connector.

   2. Disconnect the A34 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 G126-7 (BNT1) - A34-2 Always Below 1 Ω G126-7 (BNT1) - Body ground Always 10 kΩ or higher A34-2 - 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