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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1609 (Engine Controls - Pinpoint Test JD: Crankshaft Position (CKP) Sensor Through Pinpoint Test KJ: Supercharger Bypass Control - (Except Diesel & Hybrid)) >> Pinpoint Test KF: Fan Control (FC) Relays >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, 2010 Lincoln Town Car, and 2010 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
  1. KF1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Are DTCs P0480, P0481, P1474 or P1479 present? 

    Yes No
    For KOEO and KOER DTCs P0480 or P1474, GO to  KF2.
    For continuous memory DTCs P0480 or P1474, GO to  KF21.
    For KOEO and KOER DTCs P0481 or P1479, Escape 3.0L, Mariner 3.0L.
    GO to  KF12.
    For continuous memory DTCs P0481 or P1479, Escape 3.0L, Mariner 3.0L.
    GO to  KF25.
    For KOEO and KOER DTCs P0481 or P1479, all others,
    GO to  KF7.
    For continuous memory DTCs P0481 or P1479, all others,
    GO to  KF23.    		 For fans always on: components, GO to  KF28.
    For fans always on: all others, GO to  KF27.
    For cooling fan circuits, GO to  KF28.
    For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. KF2 KOEO AND KOER DTCS P0480 OR P1474: CHECK THE VPWR VOLTAGE TO THE LOW FC RELAY 
    • LFC Relay connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) LFC Relay Connector, Harness Side (-)
      VPWR - Pin 1 Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KF3. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  3. KF3 CHECK FOR LFC CIRCUIT CYCLING 
    • Ignition ON, engine OFF.
    • Connect a non-powered test lamp between:
      Point A LFC Relay Connector, Harness Side Point B LFC Relay Connector, Harness Side
      VPWR - Pin 1 LFC - Pin 2
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the test lamp illuminate on and off when either the low or high speed cooling fan output is commanded on and off? 

    Yes No
    INSTALL a new LFC relay. CLEAR the DTCs. REPEAT the self-test. GO to  KF4.
  4. KF4 CHECK THE LFC CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Remove the test lamp.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) LFC Relay Connector, Harness Side (-)
      LFC - Pin 2 Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  KF5. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  5. KF5 CHECK THE LFC CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
      (+) LFC Relay Connector, Harness Side (-)
      LFC - Pin 2 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  KF6. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  6. KF6 CHECK THE LFC CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      (+) LFC Relay Connector, Harness Side (-) PCM Connector, Harness Side
      LFC - Pin 2 LFC

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  KF39. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  7. KF7 KOEO AND KOER DTCS P0481 OR P1479: CHECK THE VPWR VOLTAGE TO THE HIGH FC RELAY 
    • HFC Relay connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) HFC Relay Connector, Harness Side (-)
      VPWR - Pin 1 Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KF8. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  8. KF8 CHECK FOR HFC CIRCUIT CYCLING 
    • Ignition ON, engine OFF.
    • Connect a non-powered test lamp between:
      Point A HFC Relay Connector, Harness Side Point B HFC Relay Connector, Harness Side
      VPWR - Pin 1 HFC - Pin 2
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the test lamp illuminate on and off when either the low or high speed cooling fan output is commanded on and off? 

    Yes No
    INSTALL a new HFC relay. CLEAR the DTCs. REPEAT the self-test. GO to  KF9.
  9. KF9 CHECK THE HFC CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • Remove the test lamp.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) HFC Relay Connector, Harness Side (-)
      HFC - Pin 2 Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  KF10. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  10. KF10 CHECK THE HFC CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Ignition OFF.
    • Measure the resistance between:
      (+) HFC Relay Connector, Harness Side (-)
      HFC - Pin 2 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  KF11. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  11. KF11 CHECK THE HFC CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      (+) HFC Relay Connector, Harness Side (-) PCM Connector, Harness Side
      HFC - Pin 2 HFC

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  KF39. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  12. KF12 KOEO AND KOER DTCS P0481 OR P1479: CHECK THE VPWR VOLTAGE TO THE HFC1 RELAY 
    NOTE: This application has two relays wired to the HFC circuit. This procedure may call out HFC1 and HFC2 relays. Either of the relays may be used as the number 1, with the other relay being number 2.
    • HFC1 Relay connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) HFC1 Relay Connector, Harness Side (-)
      VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KF13. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  13. KF13 CHECK FOR HFC CIRCUIT CYCLING 
    • Connect a non-powered test lamp between:
      Point A HFC1 Relay Connector, Harness Side Point B HFC1 Relay Connector, Harness Side
      VPWR HFC
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the test lamp illuminate on and off when either the low or high speed cooling fan output is commanded on and off? 

    Yes No
    INSTALL a new HFC1 relay at the end of diagnostics. Leave the relay disconnected. CLEAR the DTCs. REPEAT the self-test.
    GO to  KF18.    		 Leave the test lamp connected.
    GO to  KF14.
  14. KF14 CHECK FOR HFC CIRCUIT CYCLING WITH THE HFC2 RLY DISCONNECTED 
    • Connect a non-powered test lamp between:
      Point A HFC1 Relay Connector, Harness Side Point B HFC1 Relay Connector, Harness Side
      VPWR HFC
    • HFC2 Relay connector disconnected.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the test lamp illuminate on and off when either the low or high speed cooling fan output is commanded on and off? 

    Yes No
    INSTALL a new HFC2 relay. CLEAR the DTCs. REPEAT the self-test. GO to  KF15.
  15. KF15 CHECK THE HFC CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS 
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) HFC1 Relay Connector, Harness Side (-)
      HFC Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  KF16. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  16. KF16 CHECK THE HFC CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Ignition OFF.
    • Measure the resistance between:
      (+) HFC1 Relay Connector, Harness Side (-)
      HFC Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  KF17. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  17. KF17 CHECK THE HFC CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      (+) HFC1 Relay Connector, Harness Side (-) PCM Connector, Harness Side
      HFC HFC

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  KF39. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  18. KF18 VERIFY THERE IS NOT AN OPEN IN THE CIRCUIT SPECIFIC TO THE HFC2 RELAY 
    • Access the PCM and monitor the HFC_F PID.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the PID indicate a concern (yes) when either the high or low speed cooling fan output is commanded on and off? 

    Yes No
    GO to  KF19. INSTALL a new HFC1 relay. CLEAR the DTCs. REPEAT the self-test.
  19. KF19 CHECK THE VPWR VOLTAGE TO HFC2 RLY 
    • HFC2 Relay connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) HFC2 Relay Connector, Harness Side (-)
      VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KF20. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  20. KF20 CHECK THE HFC CIRCUIT BETWEEN THE HIGH SPEED FC RELAY(S) 
    • Ignition OFF.
    • Measure the resistance between:
      (+) HFC1 Relay Connector, Harness Side (-) HFC2 Relay Connector, Harness Side
      HFC HFC

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new HFC relay(s).
    CLEAR the DTCs. REPEAT the self-test.    		 REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  21. KF21 CONTINUOUS MEMORY DTCS P0480 OR P1474: CHECK THE LFC CIRCUIT FOR AN INTERMITTENT OPEN OR SHORT TO VOLTAGE 
    NOTE: If the test lamp does not turn on, command the high speed fan on.
    • A/C and defrost off.
    • Left Fan Motor connector disconnected.
    • Right Fan Motor connector disconnected.
    • LFC Relay connector disconnected.
    • Connect a non-powered test lamp between:
      Point A LFC Relay Connector, Harness Side Point B LFC Relay Connector, Harness Side
      VPWR - Pin 1 LFC - Pin 2
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Observe the test lamp for an indication of a concern while carrying out the following. Note that the lamp turns off when a concern is detected.
      • shake, wiggle, and bend the LFC circuit(s).
      • shake, wiggle, and bend the VPWR circuit to the LFC relay.
      • inspect the LFC relay component for signs of damage.
    • Command the outputs OFF.
    • Exit output test mode.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. GO to  KF22.
  22. KF22 CHECK THE LFC CIRCUIT FOR AN INTERMITTENT SHORT TO GROUND 
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Observe the test lamp for an indication of a concern while carrying out the following. Note that the lamp turns on when a concern is detected.
      • shake, wiggle, and bend the LFC circuit
      • lightly tap on the LFC RLY to simulate road shock
    • Exit output test mode.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. Unable to duplicate or identify the concern at this time.
    GO to PINPOINT TEST Z .
  23. KF23 CONTINUOUS MEMORY DTCS P0481 OR P1479: CHECK THE HFC CIRCUIT FOR AN INTERMITTENT OPEN OR SHORT TO VOLTAGE 
    NOTE: If the test lamp does not turn on, command the low speed fan ON.
    • A/C and defrost off.
    • Left Fan Motor connector disconnected.
    • Right Fan Motor connector disconnected.
    • HFC Relay connector disconnected.
    • Connect a non-powered test lamp between:
      Point A HFC Relay Connector, Harness Side Point B HFC Relay Connector, Harness Side
      VPWR - Pin 1 HFC - Pin 2
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the high speed fan ON.
    • Observe the test lamp for an indication of a concern while carrying out the following. Note that the lamp turns off when a concern is detected.
      • shake, wiggle, and bend the HFC circuit(s)
      • shake, wiggle, and bend the VPWR circuit to the HFC relay
      • lightly tap on the HFC RLY to simulate road shock
    • Command the outputs OFF.
    • Exit output test mode.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary. CLEAR the DTCs. REPEAT the self-test. GO to  KF24.
  24. KF24 CHECK THE HFC CIRCUIT FOR AN INTERMITTENT SHORT TO GROUND 
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the high speed fan ON.
    • Command the outputs OFF.
    • Observe the test lamp for an indication of a concern. Note that the lamp illuminates when a concern is detected. Wiggle, shake, and bend the HFC circuit(s). Shake, wiggle, and bend the PCM on both high speed FC relays.
    • Exit output test mode.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.    		 Unable to duplicate or identify the concern at this time.
    GO to PINPOINT TEST Z .
  25. KF25 CONTINUOUS MEMORY DTCS P0481 OR P1479: CHECK THE HFC CIRCUIT FOR AN INTERMITTENT OPEN OR SHORT TO VOLTAGE 
    NOTE: This application has 2 relays wired to the HFC circuit. This procedure may call out HFC1 and HFC2 relays. Either of the relays may be used as the number 1, with the other relay being number 2.
    NOTE: If the test lamp does not turn on, command the high speed fan ON.
    • A/C and defroster OFF.
    • Left Fan Motor connector disconnected.
    • Right Fan Motor connector disconnected.
    • HFC1 Relay connector disconnected.
    • Connect a non-powered test lamp between:
      Point A HFC1 Relay Connector, Harness Side Point B HFC1 Relay Connector, Harness Side
      VPWR HFC
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Observe the test lamp for an indication of a concern while carrying out the following. Note that the lamp turns off when a concern is detected.
      • shake, wiggle, and bend the PCM and both high speed FC relays.
      • shake, wiggle, and bend the VPWR circuit to both high speed FC relays
      • lightly tap on the high speed FC relay that is still connected to simulate road shock
    • Command the outputs OFF.
    • Exit output test mode.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.    		 GO to  KF26.
  26. KF26 CHECK THE HFC CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Observe the test lamp for an indication of a concern. Note that the lamp illuminates when a concern is detected. Wiggle, shake, and bend the HFC circuit(s) between the PCM and on both high speed FC relays.
    • Exit output test mode.
    • Inspect the high speed FC relay that is disconnected for intermittent concerns.

    Is a concern present? 

    Yes No
    ISOLATE the concern and REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.    		 GO to PINPOINT TEST Z .
  27. KF27 THE COOLING FAN ALWAYS RUNS (NO DTCS): VERIFY THE FAN IS NOT ON BECAUSE OF A/C HIGH PRESSURE SWITCH INPUT TO THE PCM 
    • Ignition ON, engine running.
    • Access the PCM and monitor the ACP PID.

    Is the PID state CLOSED? 

    Yes No
    The PCM turns the fan on when the medium pressure, normally open contacts of the A/C high pressure (ACHP) switch are closed.
    GO to  KF37.    		 The input is OK.
    GO to  KF28.
  28. KF28 COOLING FAN CONCERN (NO DTCS): CHECK THE FAN CONTROL PRIMARY CIRCUITS 
    NOTE: Chose the PIDs below as appropriate, according to which circuits the vehicle has.
    • Verify that the A/C is OFF.
    • Verify engine temperature is below the temperature where the cooling fan comes on.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the LFC_F and HFC_F PIDs.

    Does either PID indicate a concern? 

    Yes No
    A concern is present in the primary circuit(s).
    GO to  KF29.    		 For all except Ranger, the PCM primary circuit(s) is OK.
    To check for secondary wiring,
    REFER to the appropriate Engine Cooling article for cooling system diagnosis.
    For Ranger:
    GO to  KF30.
  29. KF29 DOES THE LFC_F PID INDICATE A CONCERN? 

    Does the LFC_F PID indicate a concern? 

    Yes No
    The low fan control (LFC) circuitry has a primary circuit concern.
    GO to  KF2.    		 The high fan control (HFC) primary circuitry has a circuit concern.
    For Escape 3.0L, and
    Mariner 3.0L, GO to  KF12.
    For all others, GO to  KF7.
  30. KF30 IS THE SYMPTOM: COOLING FAN ALWAYS RUNS? 

    Is the symptom: cooling fan always runs? 

    Yes No
    GO to  KF36. GO to  KF31.
  31. KF31 ELECTRIC COOLING FAN CONCERN (WITH NO DTCS): ELECTRIC COOLING FAN FUNCTIONAL CHECK 
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Command the outputs OFF.
    • Exit output test mode.

    Does the fan operate? 

    Yes No
    All cooling fan circuit checks are OK. RETURN to SYMPTOM CHARTS , to continue diagnosis. GO to  KF32.
  32. KF32 FAN INOPERATIVE: COMMAND THE LOW SPEED FAN ON AND CHECK FOR VOLTAGE TO THE COOLING FAN MOTOR 
    • Ignition OFF.
    • Cooling Fan Motor connector disconnected.
    • Ignition ON, engine OFF.
    • Enter output test mode. Refer to OUTPUT TEST MODE (OTM) .
    • Command the low speed fan ON.
    • Measure the voltage between:
      (+) Cooling Fan Motor Connector, Harness Side (-)
      VPWR - Pin 2 Ground
    • Command the outputs OFF.
    • Exit output test mode.

    Is the voltage greater than 10 V with the outputs commanded ON? 

    Yes No
    GO to  KF33. GO to  KF34.
  33. KF33 CHECK THE GROUND CIRCUIT TO THE COOLING FAN MOTOR 
    • Ignition OFF.
    • Measure the resistance between:
      (+) Cooling Fan Motor Connector, Harness Side (-)
      GND - Pin 1 Ground

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new Cooling Fan motor. CLEAR the DTCs. REPEAT the self-test. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  34. KF34 CHECK THE B+ VOLTAGE TO THE FC RELAY 
    • FC Relay connector disconnected.
    • Measure the voltage between:
      (+) FC Relay Connector, Harness Side (-)
      B+ Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  KF35. REPAIR the open circuit. There is a B+ circuit concern. CHECK the condition of the related fuse/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is damaged, CHECK the circuit for a short to ground before replacing the fuse/fuse link.
    CLEAR the DTCs. REPEAT the self-test.
  35. KF35 CHECK THE FAN PWR CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
      (+) FC Relay Connector, Harness Side (-) Cooling Fan Motor Connector, Harness Side
      FAN PWR VPWR - Pin 2

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new FC relay. CLEAR the DTCs. REPEAT the self-test. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  36. KF36 CHECK FOR FC RLY CONTACTS ALWAYS CLOSED 
    NOTE: Verify the A/C and defrost are off.
    • FC Relay connector disconnected.
    • Ignition ON, engine OFF.

    Does the fan run with the ignition in the ON position? 

    Yes No
    REPAIR the short circuit to PWR. CLEAR the DTCs. REPEAT the self-test. INSTALL a new FC relay. CLEAR the DTCs. REPEAT the self-test.
  37. KF37 CHECK THE A/CHPSW (MEDIUM PRESSURE, NORMALLY OPEN CONTACTS) 
    • A/CHPSW connector disconnected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the ACP PID.

    Is the PID state CLOSED? 

    Yes No
    GO to  KF38. CONNECT the A/CHPSW. REFER to the appropriate Climate Control System article , Refrigerant System Test to diagnose the A/C system pressure. If OK, INSTALL a new A/CHPSW.
    CLEAR the DTCs. REPEAT the self-test.
  38. KF38 CHECK THE A/CPSW CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Ignition OFF.
    • PCM connector disconnected.
    • Measure the resistance between:
      (+) A/CHPSW Connector, Harness Side (-)
      A/CPSW Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    VERIFY the results of the previous test steps. RETURN to SYMPTOM CHARTS , to continue diagnosis. REPAIR the short circuit to GND. CLEAR the DTCs. REPEAT the self-test.
  39. KF39 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test and verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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