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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 747 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P E-Series & 99P F450/550)) >> Pinpoint Test AM: A/C Clutch Relay, A/C Circuits >> Test Procedure

Test Procedure

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  1. AM1 DTC P1464: CHECK ACCS PID 
    NOTE: Verify A/C and defrost were off during self-test. If A/C or defrost were on, turn off and rerun self-test.
    • Key on, engine off.
    • A/C and defrost off.
    • Access ACCS PID.

    IS ACCS PID ON? 

    Yes No
    Go to  AM2.
    ACCS input to PCM is requesting A/C. Refer to the appropriate CLIMATE CONTROL SYSTEM article.    		 The 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. AM2 ACCS PID ON: DISCONNECT A/C CYCLING SWITCH AND CHECK IF ACCS PID TURNS OFF 
    • Key off.
    • Disconnect A/C cycling switch.
    • Key on, engine off.
    • Access ACCS PID.

    IS ACCS PID OFF? 

    Yes No
    VERIFY operation of A/C demand switch. Refer to appropriate CLIMATE CONTROL SYSTEM article. If OK, REPAIR short to power in A/C demand circuit to A/C cycling switch. Go to  AM3.
  3. AM3 CHECK ACCS CIRCUIT FOR SHORT TO POWER IN HARNESS 
    • Key off.
    • Disconnect the PCM.
    • Key on, engine off.
    • Measure the voltage between the PCM harness connector pin 41 and ground.

    IS VOLTAGE LESS THAN 1.0 VOLTS? 

    Yes No
    REPLACE PCM. REFER to DIAGNOSTIC METHODS - 6.0L DIESEL . REPAIR short circuit.
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