For a complete Engine wiring diagram Refer to Section 8W.When Monitored:With the ignition on. Battery voltage greater than 10 volts.Set Condition:Throttle Position Sensor voltage at the PCM is less than 0.16 of a volt for 0.7 of a second. One Trip Fault. Three good trips to turn off the MIL. ETC light will illuminate.Possible Causes(F855) 5-VOLT SUPPLY CIRCUIT OPEN(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND(K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K922) TP RETURN CIRCUITTHROTTLE POSITION SENSOR/THROTTLE BODYTHROTTLE PLATE JAMMED AGAINST THE MAXIMUM STOPPCMAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).1. TP SENSOR NO.2 BELOW 0.35 OF A VOLT When this DTC is Active the engine speed, torque, and vehicle speed are limited to a Limp in mode.If a 5-Volt supply DTC has also set, diagnose the 5-Volt DTC before continuing.Make sure the throttle moves freely and does not hang up at Wide Open Throttle, by performing the Throttle Follower Test If P2101 is also set, then make sure that the blade moves freely and does not hang up near Wide Open Throttle before trying to repair P0222.Ignition on, engine not running.With the scan tool, read the TP Sensor voltage.Is the voltage below 0.35 of a volt?YesGo To 2NoGo To 112. P0122 ALSO SETWas the P0122-TP SENSOR NO.1 VOLTAGE LOW DTC set along with the P0222?YesGo To 3NoGo To 4 3. (F855) 5-VOLT SUPPLY CIRCUIT

Turn the ignition off.Disconnect the Throttle Body harness connector.Ignition on, engine not running.Measure the voltage on the (F855) 5-volt Supply circuit in the Throttle Body harness connector.Is the voltage between 4.5 to 5.2 volts?YesGo To 4NoGo To 84. THROTTLE POSITION SENSOR

Connect a jumper wire between the (F855) 5-volt Supply circuit and the (K122) TP Signal 2 circuit in the Throttle Body harness connector.With the scan tool, monitor the TP Sensor No.2 voltage.Is the voltage between 4.8 and 5.2 volts with the jumper wire installed?YesDisconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, with a scan tool select the ETC RELEARN function.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoGo To 5Remove the jumper wire before continuing.5. (K122) TP SIGNAL 2 CIRCUIT OPEN

Turn the ignition off.Disconnect the C2 PCM harness connector.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 Miller Special Tool #8815 to perform diagnosis.Measure the resistance of the (K122) TP Signal 2 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.Is the resistance below 5.0 ohms?YesGo To 6NoRepair the open in the (K122) TP Signal 2 circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 6. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND

Measure the resistance between ground and the (K122) TP Signal 2 circuit at the Throttle Body harness connector.Is the resistance below 100 ohms?YesRepair the short to ground in the (K122) TP Signal 2.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoGo To 77. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K922) TP RETURN CIRCUIT

Measure the resistance between the (K122) TP Signal 2 circuit and the (K922) TP Return circuit at the Throttle Body harness connector.Is the resistance below 100 ohms?YesRepair the short between the (K922) TP Return circuit and the (K122) TP Signal 2 circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NoGo To 108. (F855) 5-VOLT SUPPLY CIRCUIT OPEN

Turn the ignition off.Disconnect the C2 PCM harness connector.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 Miller Special Tool #8815 to perform diagnosis.Measure the resistance of the (F855) 5-volt Supply circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.Is the resistance below 5.0 ohms?YesGo To 9NoRepair the open in the (F855) 5-volt Supply circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9. (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Measure the resistance between ground and the (F855) 5-volt Supply circuit at the Throttle Body harness connector.Is the resistance below 100 ohms?YesRepair the short to ground in the (F855) 5-volt Supply circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 1010. PCMBefore continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.Were there any problems found?YesRepair as necessary.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Powertrain Control Module per Service Information.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)11. THROTTLE FOLLOWER TESTIgnition on, engine not running.With the scan tool, perform the Throttle Follower Test.Monitor the TP Sensor No.2 voltage while slowly pressing the Throttle pedal down.Is there a smooth voltage change from high to low?YesRefer to the INTERMITTENT CONDITION Diagnostic Procedure.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoDisconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, with a scan tool select the ETC RELEARN function.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)