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Lincoln Corsair: Electronic Engine Controls - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Powertrain Control Module (PCM) Input and Output Controls

Lincoln Corsair 2020-2023 Service Manual / Powertrain / Engine / Electronic Engine Controls - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Powertrain Control Module (PCM) Input and Output Controls

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Module DTC Description Action
PCM P0219:00 Engine Overspeed Condition: No Sub Type Information GO to Pinpoint Test Z
PCM P0297:00 Vehicle Overspeed Condition: No Sub Type Information GO to Pinpoint Test Z
PCM P0603:00 Internal Control Module Keep Alive Memory (KAM) Error: No Sub Type Information GO to Pinpoint Test QB
PCM P0642:00 Sensor Reference Voltage 'A' Circuit Low: No Sub Type Information GO to Pinpoint Test C
PCM P0643:00 Sensor Reference Voltage 'A' Circuit High: No Sub Type Information GO to Pinpoint Test C
PCM P0652:00 Sensor Reference Voltage 'B' Circuit Low: No Sub Type Information GO to Pinpoint Test C
PCM P0653:00 Sensor Reference Voltage 'B' Circuit High: No Sub Type Information GO to Pinpoint Test C
PCM P0685:00 ECM/PCM Power Relay Control Circuit/Open: No Sub Type Information GO to Pinpoint Test B
PCM P0686:00 ECM/PCM Power Relay Control Circuit Low: No Sub Type Information GO to Pinpoint Test B
PCM P0687:00 ECM/PCM Power Relay Control Circuit High: No Sub Type Information GO to Pinpoint Test B
PCM P0689:00 ECM/PCM Power Relay Sense Circuit Low: No Sub Type Information GO to Pinpoint Test B
PCM P068A:00 ECM/PCM Power Relay De-Energized - Too Early: No Sub Type Information GO to Pinpoint Test B
PCM P0690:00 ECM/PCM Power Relay Sense Circuit High: No Sub Type Information GO to Pinpoint Test B
PCM P06A6:00 Sensor Reference Voltage 'A' Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test C
PCM P06A7:00 Sensor Reference Voltage 'B' Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test C
PCM P06A8:00 Sensor Reference Voltage 'C' Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test C
PCM P06B8:00 Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error: No Sub Type Information GO to Pinpoint Test B
PCM P1633:00 Keep Alive Power Voltage Too Low: No Sub Type Information GO to Pinpoint Test QB
PCM P1793:00 Ignition Supply Malfunction >16, <7 volts: No Sub Type Information GO to Pinpoint Test B
PCM P2510:00 ECM / PCM Power Relay Sense Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test B
PCM P2610:00 ECM/PCM Engine Off Timer Performance: No Sub Type Information GO to Pinpoint Test QB
PCM U300C:00 Ignition Input Off/On/Start: No Sub Type Information GO to Pinpoint Test B

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Driver Aid & Information > Warning Indicators/Messages/Chimes > Electronic Throttle Control (Wrench Image) > Stays On GO to Pinpoint Test Z
Driver Aid & Information > Warning Indicators/Messages/Chimes > Service Engine Soon (Engine Image) > Stays On GO to Pinpoint Test Z
Driver Aid & Information > Warning Indicators/Messages/Chimes > Transmission > Stays On GO to Pinpoint Test Z
Start/Run/Move > Starting > No Crank > Always GO to Pinpoint Test C
Start/Run/Move > Starting > No Crank > Intermittent GO to Pinpoint Test Z
Start/Run/Move > Starting > Slow Crank/Battery > Intermittent GO to Pinpoint Test Z
Start/Run/Move > Starting > Hard Start/Long Crank > Always GO to Pinpoint Test C
Start/Run/Move > Starting > Hard Start/Long Crank > Intermittent GO to Pinpoint Test Z
Start/Run/Move > Starting > Auto-Start-Stop > Inoperative GO to Pinpoint Test Z
Start/Run/Move > Running > Engine Won't Shut Off > Always GO to Pinpoint Test B
Start/Run/Move > Moving > Upshift Quality > Intermittent GO to Pinpoint Test Z
Start/Run/Move > Moving > Downshift Quality > Intermittent GO to Pinpoint Test Z
Driving Performance > Runs Rough > All Running Modes > Intermittent GO to Pinpoint Test Z
Driving Performance > Idle Quality > Rolling > Intermittent GO to Pinpoint Test Z
Driving Performance > Stalls/Quits > At Idle > Intermittent GO to Pinpoint Test Z
Driving Performance > Backfires > At Idle > Intermittent GO to Pinpoint Test Z
Driving Performance > Backfires > Acceleration > Intermittent GO to Pinpoint Test Z
Driving Performance > Backfires > Deceleration > Intermittent GO to Pinpoint Test Z
Driving Performance > Lack/Loss of Power > Acceleration > Intermittent GO to Pinpoint Test Z
Driving Performance > Lack/Loss of Power > Cruise/ Steady Speed > Intermittent GO to Pinpoint Test Z
Driving Performance > Spark Knock > Acceleration > Intermittent GO to Pinpoint Test Z
Driving Performance > Spark Knock > Cruise/ Steady Speed > Intermittent GO to Pinpoint Test Z
Driving Performance > Poor Fuel Economy > Highway Driving > Unloaded GO to Pinpoint Test Z
Driving Performance > Poor Fuel Economy > Combined > Unloaded GO to Pinpoint Test Z
Driving Performance > Hesitates/Stumble > Acceleration > Intermittent GO to Pinpoint Test Z
Driving Performance > Hesitates/Stumble > Cruise/ Steady Speed > Intermittent GO to Pinpoint Test Z

Pinpoint Tests


PINPOINT TEST B: POWERTRAIN CONTROL MODULE (PCM) POWER RELAY
Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0685:00 ECM/PCM Power Relay Control Circuit/Open: No Sub Type Information Sets when the ISP-R circuit indicates the ignition is in the OFF, ACC, or LOCK mode, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time. Ability to communicate with the PCM when the ignition is in the OFF, ACC, or LOCK mode indicates a hard fault.
PCM P0686:00 ECM/PCM Power Relay Control Circuit Low: No Sub Type Information Sets when the ISP-R circuit indicates the ignition is in the OFF, ACC, or LOCK mode, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time. Ability to communicate with the PCM when the ignition is in the OFF, ACC, or LOCK mode indicates a hard fault.
PCM P0687:00 ECM/PCM Power Relay Control Circuit High: No Sub Type Information Sets when the ISP-R circuit indicates the ignition is in the OFF, ACC, or LOCK mode, and the amount of time the PCM remains powered through the PCM power relay exceeds a predetermined amount of time. Ability to communicate with the PCM when the ignition is in the OFF, ACC, or LOCK mode indicates a hard fault.
PCM P0689:00 ECM/PCM Power Relay Sense Circuit Low: No Sub Type Information Sets when the ISP-R and the INJPWRM circuit voltages do not correspond for a calibrated period of time. The INJPWRM PID voltage reading should be 0 volts when the ignition is in the OFF, ACC or LOCK mode.
PCM P068A:00 ECM/PCM Power Relay De-Energized - Too Early: No Sub Type Information Sets when the non volatile random access memory write did not complete successfully after the ignition key was turned OFF, prior to PCM shutdown. This DTC also sets when the PCM power relay is de-energized too early.
PCM P0690:00 ECM/PCM Power Relay Sense Circuit High: No Sub Type Information Sets when the voltage from the ISP-R, the INJPWRM or the VPWR circuit does not correspond for a calibrated period of time.
PCM P06B8:00 Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error: No Sub Type Information Sets when the PCM detects a concern with the ability of the PCM to correctly store permanent Diagnostic Trouble Codes (DTCs). Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for aftermarket performance products. Check for an electrical or charging system concern. If an updated calibration is available, update the calibration to the latest level. If an updated calibration is not available, clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test. If this DTC is retrieved after a PCM reprogramming, turn the ignition OFF and allow the PCM to complete a normal power down sequence.
PCM P1793:00 Ignition Supply Malfunction >16, <7 volts: No Sub Type Information Sets when the PCM detects the ISP-R circuit voltage is less than 7 volts or greater than 16 volts.
PCM P2510:00 ECM / PCM Power Relay Sense Circuit Range/Performance: No Sub Type Information Sets when the PCM detects the voltage on the ISP-R and the INJPWRM circuits do not correspond for a calibrated period of time. The INJPWRM PID voltage reading should be 0 volts when the ignition is in the OFF, ACC or LOCK mode.
PCM U300C:00 Ignition Input Off/On/Start: No Sub Type Information Sets when the PCM does not receive (or cannot detect) the ignition mode.

Possible Sources

  • PCM power circuitry concern
  • PCM power relay (12A646)
  • PCM (12A650)
PINPOINT TEST C: REFERENCE VOLTAGE (VREF)
Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0642:00 Sensor Reference Voltage 'A' Circuit Low: No Sub Type Information Sets when the PCM detects the sensor VREF circuit is less than the minimum. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P0643:00 Sensor Reference Voltage 'A' Circuit High: No Sub Type Information Sets when the PCM detects the sensor VREF circuit is greater than the maximum. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P0652:00 Sensor Reference Voltage 'B' Circuit Low: No Sub Type Information Sets when the PCM detects the electronic throttle control (ETC) VREF circuit is less than the minimum. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P0653:00 Sensor Reference Voltage 'B' Circuit High: No Sub Type Information Sets when the PCM detects the electronic throttle control (ETC) VREF circuit is greater than the maximum. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P06A6:00 Sensor Reference Voltage 'A' Circuit Range/Performance: No Sub Type Information Sets when the PCM detects the VREF circuit is not within a calibrated voltage range. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P06A7:00 Sensor Reference Voltage 'B' Circuit Range/Performance: No Sub Type Information Sets when the PCM detects the VREF circuit is not within a calibrated voltage range. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.
PCM P06A8:00 Sensor Reference Voltage 'C' Circuit Range/Performance: No Sub Type Information Sets when the PCM detects the VREF circuit is not within a calibrated voltage range. All other Diagnostic Trouble Codes (DTCs) should be diagnosed first.

Possible Sources

  • Sensor circuitry concern
  • APP sensor (9F836)
  • Air conditioning pressure sensor (19D594)
  • Brake vacuum sensor
  • Crankcase pressure sensor (6758)
  • CKP sensor (6C315)
  • CMP sensor (6B288)
  • Differential pressure feedback EGR sensor
  • Electric EGR valve
  • Electronic throttle body TP sensor (9E928)
  • Exhaust pressure sensor
  • Fuel pressure sensor (9F972)
  • FRP sensor (6B288)
  • Fuel rail pressure temperature sensor (9G756)
  • Fuel tank pressure sensor (9C052)
  • Generator current sensor (14B357)
  • IMRC sensor (9J559)
  • MAP sensor (9F479)
  • MAPT sensor (9F479)
  • MAP / CAC temperature sensor (9F479)
  • MAP / IAT2 sensor (9F479)
  • Particulate filter pressure sensor (9G824)
  • Turbocharger boost pressure sensor (9F479)
  • Turbocharger boost pressure /CAC temperature sensor (9F479)
  • TCIPT (9F479)
  • Turbocharger wastegate motor
  • Wastegate vacuum sensor (9F479)
  • PCM (12A650)
PINPOINT TEST QB: KEEP ALIVE POWER (KAPWR)
Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0603:00 Internal Control Module Keep Alive Memory (KAM) Error: No Sub Type Information Sets when the PCM detects an internal memory concern. However, there are external items that can cause this DTC . If keep alive power is interrupted to the PCM because of a battery or PCM disconnect, this DTC can be generated on the first power-up. If keep alive power is interrupted to the PCM because of a battery or PCM disconnect, this DTC can be generated on the first power-up.
PCM P1633:00 Keep Alive Power Voltage Too Low: No Sub Type Information Sets when the PCM detects the keep alive power circuit has experienced a voltage interrupt. Loss of keep alive power to the PCM results in immediate MIL illumination and sets DTC P1633.
PCM P2610:00 ECM/PCM Engine Off Timer Performance: No Sub Type Information Sets when the PCM detects the difference between the engine off time and the central processing unit (CPU) time exceeds a calibrated limit for a calibrated amount of time. This DTC may set with other Diagnostic Trouble Codes (DTCs). Check for all other Diagnostic Trouble Codes (DTCs) and diagnose those first. If DTC P2610 sets after a module programming, disregard this DTC . Clear the Diagnostic Trouble Codes (DTCs) and repeat the PCM self-test.

Possible Sources

  • Battery terminal condition
  • PCM circuitry concern
  • PCM
PINPOINT TEST Z: INTERMITTENT
Introduction

Normal Operation and Fault Conditions

This pinpoint test is intended to diagnose and isolate intermittent concerns for all EEC subsystems. Parameter identifiers (PIDs) corresponding to a circuit can be used to aid in identifying the intermittent cause. Some circuits do not have an associated PID or the PID may not be available and must be measured using a digital multimeter.

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0219:00 Engine Overspeed Condition: No Sub Type Information Sets when the PCM detects the vehicle is operated in a manner which caused the engine speed to exceed a calibrated limit. The engine RPM is continuously monitored and evaluated by the PCM . This DTC sets when the RPM exceeds the calibrated limit set within the PCM . This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). For additional information on the engine RPM limiter, refer to Powertrain Control Software. If DTC P1285 or P1299 is present, disregard DTC P0219 at this time. Diagnose DTC P1285 or P1299 first. If there are no other symptoms, return the vehicle to the customer with information about the DTC.
PCM P0297:00 Vehicle Overspeed Condition: No Sub Type Information Sets when the PCM detects the vehicle is operated in a manner which caused the vehicle speed to exceed a calibration limit. The vehicle speed is continuously monitored and evaluated by the PCM . For additional information on the vehicle speed limiter, refer to Powertrain Control Software. If there are no other symptoms, return the vehicle to the customer with information about the DTC .

Possible Sources

  • Wiring, terminals, or connectors
  • Mechanical concern
  • Suspect sensor concern

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    Information on P Type Tires

    Lincoln Corsair. Information on P Type Tires

    P215/65R15 95H is an example of a tire size, load index and speed rating. The definitions of these items are listed below. (Note that the tire size, load index and speed rating for your vehicle may be different from this example.)

    P: Indicates a tire, designated by the Tire and Rim Association, that may be used for service on cars, sport utility vehicles, minivans and light trucks. Note: If your tire size does not begin with a letter this may mean it is designated by either the European Tire and Rim Technical Organization or the Japan Tire Manufacturing Association. 215: Indicates the nominal width of the tire in millimeters from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire. 65: Indicates the aspect ratio which gives the tire's ratio of height to width. R: Indicates a radial type tire. 15: Indicates the wheel or rim diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel diameter. 95: Indicates the tire's load index. It is an index that relates to how much weight a tire can carry. You may find this information in your owner’s manual. If not, contact a local tire dealer.

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