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Home >> Dodge and Ram >> 2010 >> Nitro SE, RWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0205 To P0430 >> P0221-Throttle Position Sensor 2 Performance >> Diagnostic Test

Diagnostic Test

  1. ACTIVE DTC 
    NOTE: When this DTC is Active the engine speed, torque, and vehicle speed are limited to a Limp in mode.
    NOTE: Diagnose any other TP Sensor DTC(s) before continuing.
    NOTE: The throttle plate and linkage should be free from binding and carbon build up.
    NOTE: Make sure the throttle plate is at the idle position.
    NOTE: Inspect the engine for vacuum leaks.
    1. Ignition on, engine not running.
    2. With a scan tool, select View DTCs.

      Is the DTC Active at this time?

      Yes 

      • Go to step  2

      No 

      • Go to step  9
  2. EXCESSIVE RESISTANCE IN THE (K122) TP SIGNAL 2 CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the C2 PCM harness connector.
      CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the PCM Pinout Box 8815 along with the Adapter 8815-1 to perform the diagnosis.
    3. Using a voltmeter perform a voltage drop test. Backprobe the (K122) TP Signal 2 circuit at the Throttle Body harness connector and probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter.
      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.
    4. Start the engine and allow it to reach normal operating temperature.
    5. Monitor the voltmeter.

      Is the voltage below 0.5 of a volt?

      Yes 

      • Go to step  3

      No 

  3. EXCESSIVE RESISTANCE IN THE (K22) TP SIGNAL 1 CIRCUIT 
    1. Turn the ignition off.
    2. Move the voltmeter leads to backprobe the (K22) TP Signal 1 circuit at the Throttle Body harness connector and to probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter.
      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.
    3. Start the engine and allow it to reach normal operating temperature.
    4. Monitor the voltmeter.

      Is the voltage below 0.5 of a volt?

      Yes 

      • Go to step  4

      No 

  4. EXCESSIVE RESISTANCE IN THE (K855) 5-VOLT SUPPLY CIRCUIT 
    1. Turn the ignition off.
    2. Move the voltmeter leads to backprobe the (K855) 5-volt Supply circuit at the Throttle Body harness connector and to probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter.
      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.
    3. Start the engine and allow it to reach normal operating temperature.
    4. Monitor the voltmeter.

      Is the voltage below 0.5 of a volt?

      Yes 

      • Go to step  5

      No 

  5. EXCESSIVE RESISTANCE IN THE (K922) TP SENSOR GROUND CIRCUIT 
    1. Turn the ignition off.
    2. Move the voltmeter leads to backprobe the (K922) TP Sensor Ground circuit at the Throttle Body harness connector and to probe the appropriate terminal of the special tool #8815. Make sure the voltmeter leads are connected so a positive polarity is displayed on the voltmeter.
      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.
    3. Start the engine and allow it to reach normal operating temperature.
    4. Monitor the voltmeter.

      Is the voltage below 0.5 of a volt?

      Yes 

      • Go to step  6

      No 

  6. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO THE (K122) TP SIGNAL 2 CIRCUIT 
    Fig 1: Checking TP Signal 1 Circuit For Short To TP Signal 2 Circuit
    GC0128316Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (K22) TP Signal 1 circuit and the (K122) TP Signal 2 circuit at the Throttle Body harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      No 

      • Go to step  7
  7. THROTTLE POSITION SENSOR 
    Fig 2: Checking Throttle Position Sensor (TP Sensor Ground Circuit)
    GC0128317Courtesy of CHRYSLER LLC
    Fig 3: Checking Throttle Position Sensor (5-Volt Supply Circuit)
    GC0128318Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Connect the C2 PCM harness connector.
    3. Ignition on, engine not running.
    4. With the scan tool, monitor the TP Signal 1 and 2 voltage.
    5. Connect a jumper wire between the (K922) TP Sensor Ground circuit and the (K22) TP Signal 1 circuit.
      NOTE: TP Sensor 1 voltage should change from approximately 4.7 volts to 0.3 of a volt.
    6. For TP Sensor 2, connect a jumper wire between (K855) 5-volt supply circuit and the (K122) TP Signal 2 circuit.
      NOTE: TP Sensor 2 voltage should change from approximately 0 volts to 5.0 volts.

      Is the voltage reading within the listed specification with the jumper wire installed?

      Yes 

      No 

      • Go to step  8
        NOTE: Remove the jumper wire before continuing.
  8. 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. Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors.
    4. Refer to any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors. If OK, replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, using a scan tool select the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  9. THROTTLE FOLLOWER TEST 
    1. Ignition on, engine not running.
    2. With the scan tool, perform the ETC Throttle Follower Test and monitor the TP Sensor 1 or 2 voltage.
    3. Slowly press the throttle pedal down.
    4. The voltage for TP Sensor 1 should start at approximately 0.7 of a volt and increase to approximately 4.3 volts.
    5. The voltage for TP Sensor 2 should start at approximately 4.3 volts and decrease to approximately 0.7 of a volt.

      Is the voltage within the range of the listed specification for the appropriate Sensor?

      Yes 

      No 

      • Verify that there is good pin to terminal contact in the Throttle Body and Powertrain Control Module connectors. If OK, replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, using a scan tool select the ETC RELEARN function.
      • Perform the POWERTRAIN VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
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