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Diagnostic Test

  1. DTC IS ACTIVE 
    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) 5-VOLT SUPPLY CIRCUIT VOLTAGE 
    Fig 1: Checking 5-Volt Supply Circuit
    GC0099768Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Throttle Body connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (F855) 5-Volt Supply circuit in the Throttle Body harness connector.

      Is the voltage between 4.5 and 5.5 volts?

      Yes 

      • Go to step  3

      No 

      • Go to step  7
  3. (K122) TP SIGNAL 2 CIRCUIT VOLTAGE 
    Fig 2: Checking TP Sensor Circuit
    GC0099817Courtesy of CHRYSLER LLC
    1. Measure the voltage of the (K122) TP Signal 2 circuit in the Throttle Body harness connector.

      Is the voltage between 4.5 and 5.5 volts?

      Yes 

      • Go to step  4

      No 

      • Go to step  11
  4. (K922) TP SENSOR GROUND CIRCUIT TEST 
    Fig 3: Checking TP Ground Circuit
    GC0099770Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Using a 12 volt test light connected to 12 volts, check the (K922) TP Sensor Ground in the Throttle Body harness connector.
      NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go to step  5

      No 

      • Go to step  15
  5. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K122) TP SIGNAL 2 CIRCUIT 
    Fig 4: Checking 5-Volt Supply Circuit
    GC0099818Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (F855) 5-Volt Supply circuit and the (K122) TP Signal 2 circuit in the Throttle Body harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  6

      No 

  6. THROTTLE BODY 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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. Inspect the Throttle Body for any condition that would result in an incorrect signal, such as damage or contamination.

      Were any problems found?

      Yes 

      No 

  7. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE 
    Fig 5: Checking 5-Volt Supply Circuit
    GC0099768Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (F855) 5-Volt Supply circuit in the Throttle Body harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  8
  8. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 
    Fig 6: Checking 5-Volt Supply Circuit
    GC0099772Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Measure the resistance between ground and the (F855) 5-Volt Supply circuit in the Throttle Body harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  9

      No 

  9. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K922) TP SENSOR GROUND CIRCUIT 
    Fig 7: Checking 5-Volt Supply Circuit
    GC0099773Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (F855) 5-Volt Supply circuit and the (K922) TP Sensor Ground circuit in the Throttle Body harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  10

      No 

  10. (F855) 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 8: Checking 5-Volt Supply Circuit
    GC0099774Courtesy 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 (F855) 5-Volt Supply circuit between the Throttle Body harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  16

      No 

  11. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE 
    Fig 9: Checking TP Sensor Circuit
    GC0099817Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (K122) TP Signal 2 circuit in the Throttle Body harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  12
  12. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND 
    Fig 10: Checking TP Sensor Circuit
    GC0099819Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Measure the resistance between ground and the (K122) TP Signal 2 circuit in the Throttle Body harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  13

      No 

  13. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO (K922) TP SENSOR GROUND CIRCUIT 
    Fig 11: Checking TP Sensor Circuit
    GC0099820Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K122) TP Signal 2 circuit and the (K922) TP Sensor Ground circuit in the Throttle Body harness connector.

      Is the resistance above 100 ohms?

      Yes 

      • Go to step  14

      No 

  14. (K122) TP SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 12: Checking TP Sensor Circuit
    GC0099821Courtesy 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 (K122) TP Signal 2 circuit between the Throttle Body harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  16

      No 

  15. (K922) TP SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 13: Checking Ground Circuit
    GC0099778Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) connector.
      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.
    3. Measure the resistance of the (K922) TP Sensor Ground circuit between the Throttle Body harness connector and the Powertrain Control Module (PCM) harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go to step  16

      No 

  16. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body 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. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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