Engine Hood Courtesy Switch Circuit [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- Enter the following menus: Powertrain / Stop and Start / Data List / Hood Courtesy Switch.
Powertrain > Stop and Start > Data List
Tester Display Hood Courtesy Switch - According to the display on the GTS, read the Data List.
OK
GTS Display Condition Normal Condition Hood Courtesy Switch Engine hood closed ON Engine hood open OFF Result
Result OK NG
Result:
OK
CHECK AND ADJUST HOOD LOCK ASSEMBLY FITTING (ADJUST HOOD). Refer to ADJUSTMENT [10/2022 - ]
Result:
NG
See step 2
- Enter the following menus: Powertrain / Stop and Start / Data List / Hood Courtesy Switch.
- INSPECT ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)
- Inspect the engine hood courtesy switch (hood lock assembly).
Refer to INSPECTION [10/2022 - ]
Result
Result OK NG
Result:
NG
REPLACE ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY). Refer to REMOVAL [10/2022 - ]
Result:
OK
See step 3
- Inspect the engine hood courtesy switch (hood lock assembly).
- CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - BODY GROUND)
- Disconnect the engine hood courtesy switch (hood lock assembly) connector.
- 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 Result
Result OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY))
- Disconnect the engine stop and start ECU connector.
- Disconnect the engine hood courtesy switch (hood lock assembly) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A25-7 (BNT1) - A9-2 (+) Always Below 1 Ω A25-7 (BNT1) - Body ground Always 10 kΩ or higher A9-2 (+) - Body ground Always 10 kΩ or higher Result
Result OK NG
Result:
OK
CHECK AND ADJUST HOOD LOCK ASSEMBLY FITTING (ADJUST HOOD). Refer to ADJUSTMENT [10/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR