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P0121-THROTTLE POSITION SENSOR 1 PERFORMANCE (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 RESISTANCE IN THE (K22) TP SENSOR NO.1 OR (K122) TP SENSOR NO.2 SIGNAL CIRCUIT (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO GROUND RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT (F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND RESISTANCE IN THE (K922) SENSOR RETURN CIRCUIT (K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO (K122) TP SENSOR NO.2 SIGNAL CIRCUIT THROTTLE POSITION SENSOR/THROTTLE BODY PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - 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 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. Is the DTC active at this time? Yes >> Go To 2 No >> Go To 11 9 - 108 ENGINE ELECTRICAL DIAGNOSTICS WK |