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Home >> Chrysler >> 2009 >> Sebring Base, 2D Convertible, ED3 >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P2123 To P2307 - GPEC >> P2123-Accelerator Pedal Position Sensor 1 Circuit High >> Diagnostic Test

Diagnostic Test

  1. DTC IS ACTIVE 
    NOTE: Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test.
    1. Start the engine and allow it to reach normal operating temperature.
      WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
    2. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go to step  2

      No 

  2. (F855/K852) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: Checking 5-Volt Supply Circuit
    GC0099995Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Accelerator Pedal Position Sensor connector.
    3. Disconnect the Powertrain Control Module (PCM) connector.
    4. Turn the ignition on.
    5. Measure the voltage of the (F855/K852) 5-Volt Supply circuit in the Accelerator Pedal Position Sensor harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  3
  3. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE 
    Fig 2: Checking APP Signal Circuit
    GC0100049Courtesy of CHRYSLER LLC
    1. Measure the voltage of the (K23) APP Signal 1 circuit in the Accelerator Pedal Position Sensor harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  4
  4. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (F855/K852) 5-VOLT SUPPLY CIRCUIT 
    Fig 3: Checking APP Signal Circuit
    GC0100050Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K23) APP Signal 1 circuit and the (F855/K852) 5-Volt Supply circuit in the Accelerator Pedal Position Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      No 

      • Go to step  5
  5. (K23) APP SIGNAL 1 CIRCUIT SHORTED TO THE (F856/K854) 5-VOLT SUPPLY CIRCUIT 
    Fig 4: Checking APP Signal Circuit
    GC0100051Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K23) APP Signal 1 circuit and the (F856/K854) 5-Volt Supply circuit in the Accelerator Pedal Position Sensor harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      No 

      • Go to step  6
  6. (K23) APP SIGNAL 1 CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 5: Checking APP Signal Circuit
    GC0100047Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
      NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    2. Measure the resistance of the (K23) APP Signal 1 circuit between the Accelerator Pedal Position Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  7

      No 

  7. (K167) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 6: Checking APP Ground Circuit
    GC0100052Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K167) Sensor Ground circuit between the Accelerator Pedal Position Sensor harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  8

      No 

  8. ACCELERATOR PEDAL POSITION SENSOR SIGNAL VOLTAGE 
    Fig 7: Checking APP Circuit
    GC0100053Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Connect the Powertrain Control Module (PCM) connector.
    3. Connect a jumper wire between the (K167) Sensor Ground circuit and the (K23) APP Signal 1 circuit in the Accelerator Pedal Position Sensor harness connector.
    4. Turn the ignition on.
    5. With the scan tool, read the Accelerator Pedal Position Sensor signal voltage.

      Is the voltage below 1.0 volt with the jumper wire in place?

      Yes 

      • Go to step  9

      No 

      • Go to step  10
  9. ACCELERATOR PEDAL POSITION SENSOR 
    1. Turn the ignition off.
    2. Inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM).
    3. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.

      Were any problems found?

      Yes 

      No 

  10. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Accelerator Pedal Position Sensor and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Perform any Technical Service Bulletins (TSBs) that may apply.

      Were any problems found?

      Yes 

      No 

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