Pinpoint Test A: DTC B1519 Hood Ajar Switch/Circuit Failure
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
- A1 CHECK THE HOOD AJAR SWITCH CIRCUIT
- Key in OFF position.
- Disconnect: SJB C2280b.
- Measure the resistance between the SJB C2280b-5, circuit 1304 (VT/OG), harness side and ground.
- Is the resistance less than 5 ohms?
Yes : GO to A4.
No : GO to A2.
- A2 CHECK CIRCUIT 1304 (VT/OG) FOR AN OPEN
- Disconnect: Hood Ajar Switch C127.
- Measure the resistance between the SJB C2280b-5, circuit 1304 (VT/OG), harness side and the hood ajar switch C127-1, circuit 1304 (VT/OG), harness side.
- Is the resistance less than 5 ohms?
Yes : GO to A3.
No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- A3 CHECK CIRCUIT 570 (BK/WH) FOR AN OPEN
- Measure the resistance between the hood ajar switch C127-2, circuit 570 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes : INSTALL a new hood ajar switch. TEST the system for normal operation.
No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- A4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.