WARNING: This page is about a different car, the 2002 Ford RV Cutaway, 2002 Ford Econoline, 2002 Ford E450 Super Duty, and 2002 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This test applies only to vehicles equipped with diesel engines.

Turn ignition switch to OFF position. Disconnect Auxiliary PCM (APCM) Black 4-pin harness connector C2176, located below left side of instrument panel. Inspect connector for loose, damaged or corroded terminals. If connector is okay, go to next step. If connector is faulty, repair connector as necessary. Retest system operation.
Measure resistance of Tan/Orange wire between DLC terminal No. 2 and APCM Black 4-pin harness connector C2176 terminal No. 1. See Figure and Fig 1 . Measure resistance of Pink/Light Blue wire between DLC terminal No. 10 and APCM Black 4-pin harness connector C2176 terminal No. 3. If both resistances are less than 5 ohms, replace APCM. Retest system operation. If either resistance is 5 ohms or more, repair open in Tan/Orange wire and/or Pink/Light Blue wire between APCM Black 4-pin harness connector C2176 and DLC. Retest system operation.

Fig 1: Identifying Auxiliary Powertrain Control Module Black 4-Pin Harness Connector C2176 Terminals

Courtesy of FORD MOTOR CO.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Test D: Auxiliary Powertrain Control Module Does Not Respond To Scan Tool

Use the Manual With the Right Hardware

When to See a Mechanic

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