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P0123-THROTTLE POSITION SENSOR 1 CIRCUIT HIGH (5.7L) (CONTINUED) For the Engine System Schematic circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE (K22) TP SENSOR NO.1 SIGNAL CIRCUIT OPEN (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO THE (F855) 5-VOLT SUPPLY CIRCUIT (K922) SENSOR RETURN CIRCUIT OPEN THROTTLE POSITION SENSOR/THROTTLE BODY THROTTLE PLATE JAMMED AGAINST THE MAXIMUM STOP PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. TP SENSOR NO.1 VOLTAGE ABOVE 4.8 VOLTS NOTE: When this DTC is Active the engine speed, torque, and vehicle speed are limited to a Limp in mode. NOTE: Make sure the throttle is fully closed and free from binding or carbon build up. NOTE: If a 5-Volt Supply DTC has also set, diagnose the 5-Volt DTC before continuing. NOTE: If P2101 is also set, then make sure that the blade moves freely and does not hang up near Wide With a scan tool, read the TP Sensor No.1 voltage. Is the voltage above 4.8 volts? Yes >> Go To 2 No >> Go To 8 9 - 132 ENGINE ELECTRICAL DIAGNOSTICS WK |