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Home >> Ford >> 2002 >> Taurus SES, 3.0 S >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Engine Controls - Self-Diagnostics - 6.0L (99P F450/550) Diesel) >> System Tests >> Test Am: Air Conditioning Request Circuits >> Testing

Test Am: Air Conditioning Request Circuits: Testing

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Verify A/C and defrost were off during self-test. If A/C or defrost were on, turn off and rerun self-test.

  1. 1) DTC P1464: CHECK ACCS PID

    Key on, engine off. A/C and defrost off. Using scan tool, access ACCS PID. Is ACCS PID on? If yes, go to next step. ACCS input to PCM is requesting A/C. See appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING to diagnose symptom (A/C always on). If no, he ACCS PID indicates that the ACCS input to the PCM is low. Verify test results. With A/C and defrost off, rerun self-test where P1464 was received.

  2. 2) ACCS PID On: Disconnect A/C Cycling Switch & Check If ACCS PID Turns Off

    Disconnect A/C cycling switch. Key on, engine off. Using scan tool, access ACCS PID. Is ACCS PID off? If yes, verify operation of A/C demand switch. See appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. If okay, repair short to power in A/C demand circuit to A/C cycling switch. If no, turn key OFF. Go to next step.

  3. 3) Check ACCS Circuit For Short To Power In Harness

    Disconnect PCM. Key on. Measure voltage between PCM harness connector C1381A terminal No. 8 and ground. See CONTROL MODULE CONNECTOR IDENTIFICATION . Is voltage less than 1.0 volt? If yes, replace PCM. If no, repair short circuit.
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