Pinpoint Test B: No Power In Acc
WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- B1 CHECK CIRCUIT CDC33 (VT/GN) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Smart Junction Box (SJB) C2280b.
- Key in ACCESSORY position.
- Measure the voltage between SJB C2280b-4, circuit CDC33 (VT/GN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes : GO to B3.
No : GO to B2.
- B2 CHECK CIRCUIT CDC33 (VT/GN) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Ignition Switch C250.
- Measure the resistance between:
- Ignition switch C250-6, circuit CDC33 (VT/GN), harness side and SJB C2280b-4, circuit CDC33 (VT/GN), harness side.
- Ignition switch C250-6, circuit CDC33 (VT/GN), harness side and ground.
- Are the resistances less than 5 ohms between the components and greater than 10,000 ohms to ground?
Yes : GO to B4.
No : REPAIR the circuit. TEST the system for normal operation.
- B3 CHECK THE IGNITION SWITCH
- Carry out the Ignition Switch Component Test. Refer to IGNITION SWITCH for component testing.
- Is the ignition switch OK?
Yes : GO to B4.
No : REPAIR the circuit. TEST the system for normal operation.
- B4 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 CONTROL MODULES .
No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.