Pinpoint Test I: No Power To The Scan Tool
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- I1 CHECK THE DLC PINS FOR DAMAGE NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
- Disconnect the scan tool cable from the DLC.
- Inspect DLC pins 4, 5 and 16 for damage.
- Are DLC pins 4, 5 and 16 OK?
- YES : Go to I2.
- NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I2 CHECK THE DLC VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Measure the voltage between the DLC C251-16, circuit 40 (LB/WH), harness side and ground.
- Is the voltage greater than 10 volts?
- YES : Go to I3.
- NO : VERIFY the central junction box (CJB) fuse 26 (20A) is OK. If OK, REPAIR the circuit. REPEAT the network test with the scan tool.
- I3 CHECK THE DLC GROUND CIRCUITS FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the DLC C251-4, circuit 1205 (BK), harness side and ground; and between the DLC C251-5, circuit 570 (BK/WH), harness side and ground.
- Are the resistances less than 5 ohms?
NOTE: The vehicle harness may not be equipped with C251-4.- YES : REPAIR the scan tool. REPEAT the network test with the scan tool.
- NO : REPAIR the circuit in question. REPEAT the network test with the scan tool.