P0223-THROTTLE POSITION SENSOR 2 CIRCUIT HIGHFor a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Set Condition:Throttle Position Sensor No.2 Signal circuit voltage is greater than 4.9 volts for 25 ms. One Trip Fault. ETC light will illuminate.
Possible Causes(K122) TP SIGNAL 2 CIRCUIT SHORTED TO BATTERY VOLTAGE(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT(K922) TP RETURN CIRCUIT OPENTHROTTLE POSITION SENSOR/THROTTLE BODYPCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).Diagnostic Test1.ACTIVE DTCWhen 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.Ignition on, engine not running.With a scan tool, select View DTCs.Is the DTC Active at this time?YesGo To 2NoGo To 72.THROTTLE POSITION SENSORTurn the ignition off.Disconnect the Throttle Body Assembly harness connector.Ignition on, engine not running.With the scan tool monitor the TP Sensor No.2 voltage.Is the voltage below 0.5 volt?YesDisconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, with the scan tool
select the ETC RELEARN function.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 33.(K122) TP SIGNAL 2 CIRCUIT SHORTED TO BATTERY VOLTAGE Turn the ignition off.Disconnect the C2 PCM harness connector.Ignition on, engine not running. Measure the voltage on the (K122) TP Signal 2 circuit at the Throttle Body harness connector.Is the voltage above 0 volts?YesRepair the short to battery voltage in the (K122) TP Signal 2 circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 44.(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUITMeasure the resistance between the (K122) TP Signal 2 circuit and the (F855) 5-volt Supply circuit at the Throttle Body harness connector.Is the resistance below 100 ohms?YesRepair the short between the (K122) TP Signal 2 circuit and the (F855) 5-volt Supply circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To 55.(K922) TP RETURN CIRCUIT OPENDo 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 (K922) TP Return 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 (K922) TP Return circuit.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)6.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)7.THROTTLE FOLLOWER TESTWith 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 the scan tool select
the ETC RELEARN function.Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)