Diagnostic Test

1. Start the engine and allow it to reach 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, read the active DTCs.
   NOTE:

   If the DTC does not reset it may be necessary to test drive the vehicle.

   NOTE:

   If the P2122-APP Sensor 1 Circuit Low DTC is also Active, diagnose the P2122 before continuing with the P0122 diagnostic procedure.

   Is the DTC Active at this time?

   Yes 

   • Go To  2.

   No 

   • Go To  11.

Was the P0222-TP SENSOR NO. 2 VOLTAGE LOW DTC set along with the P0122?

Yes 

• Go To  3.

No 

• Go To  4.

Fig 1: Checking 5 Volt Supply Circuit

Courtesy of CHRYSLER GROUP, LLC

1. Turn the ignition off.
2. Disconnect the Throttle Body harness connector.
3. Ignition on, engine not running.
4. Measure the voltage on the (K855) 5 Volt Supply circuit in the Throttle Body harness connector.

   Is the voltage between 4.8 to 5.2 Volts?

   Yes 

   • Go To  4.

   No 

   • Go To  8.

1. With the scan tool, monitor the TP Sensor No. 1 voltage with the Sensor harness connector disconnected.
   NOTE:

   The sensor voltage should be approximately 5.0 Volts (plus or minus 0.1 of a volt) with the connector disconnected.

   Does the scan tool display the voltage as described above?

   Yes 

   • 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. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, using a scan tool select ETC RELEARN function.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

   No 

   • Go To  5.

Fig 2: Checking TP Sensor No. 1 Signal Circuit For Short To Ground

Courtesy of CHRYSLER GROUP, LLC

1. Turn the ignition off.
2. Disconnect the C2 PCM harness connector.
3. Measure the resistance between ground and the (K22) TP Sensor No. 1 Signal circuit in the Throttle Body harness connector.

   Is the resistance below 100 Ohms?

   Yes 

   • Repair the short to ground in the (K22) TP Sensor No. 1 Signal circuit.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

   No 

   • Go To  6.

Fig 3: Checking TP Sensor No. 1 Signal Circuit For Short To TP Sensor Return Circuit

Courtesy of CHRYSLER GROUP, LLC

1. Measure the resistance between the (K22) TP Sensor No. 1 Signal circuit and the (K922) TP Sensor Return circuit in the Throttle Body harness connector.

   Is the resistance below 100 Ohms?

   Yes 

   • Repair the short between the (K922) TP Sensor Return circuit and the (K22) TP Sensor No. 1 Signal circuit.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

   No 

   • Go To  7.

1. Measure the resistance of the (K22) TP Sensor No. 1 Signal circuit between the Throttle Body harness connector to the PCM C2 harness connector.

   Is the resistance below 5.0 Ohms?

   Yes 

   • Go To  10.

   No 

   • Repair the excessive resistance in the (K22) TP Sensor No. 1 Signal circuit.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance of the (K855) 5 Volt Supply circuit from the Throttle Body harness connector to the PCM C2 harness connector.

   Is the resistance below 5.0 Ohms?

   Yes 

   • Go To  9.

   No 

   • Repair the open in the (K855) 5 Volt Supply circuit.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

Fig 4: Checking 5 Volt Supply Circuit For Short To Ground

Courtesy of CHRYSLER GROUP, LLC

1. Measure the resistance between ground and the (K855) 5 Volt Supply circuit in the Throttle Body harness connector.

   Is the resistance below 100 Ohms?

   Yes 

   • Repair the short to ground in the (K855) 5 Volt Supply circuit.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

   No 

   • Go To  10.

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. Perform any Technical Service Bulletins that may apply.

   Were there any problems found?

   Yes 

   • Repair as necessary.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

   No 

   • Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

1. With the scan tool, perform the ETC Throttle Follower Test.
2. Monitor the TP Sensor No. 1 voltage.

   Does the voltage start at approximately 0.7 of a Volt and increase to approximately 4.3 Volts with a smooth transition?

   Yes 

   • Refer to STANDARD PROCEDURE and perform the INTERMITTENT CONDITION diagnostic procedure.

   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. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, using a scan tool select ETC RELEARN function.
   • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.