For a complete wiring diagram Refer to Section 8WWhen Monitored:With the ignition on.Set Condition:The ECM detects a low voltage on the Sensor Supply 3 circuit for 0.10 secondsPossible CausesINTERMITTENT DTCCRANKSHAFT POSITION SENSORACCELERATOR PEDAL POSITION SENSOR5-VOLT SUPPLY CIRCUIT SHORTED TO GROUNDENGINE CONTROL MODULEAlways perform the Pre-Diagnostic Troubleshooting procedure before proceeding.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)The ECM contains 3 internal 5–Volt Sensor Supply sources. Each 5–Volt Supply source is split into parallel circuits to provide 5 volts to multiple sensors. Sensor Supply 2 provides 5 volts to the Crankshaft Position Sensor and the Accelerator Pedal Position Sensor 1.1. CHECK FOR ACTIVE DTCTurn the ignition on.With the scan tool, erase ECM DTCs.Turn the ignition off for 10 seconds.Turn the ignition on.With the scan tool, View DTCs.Is the status Active for this DTC?YesGo To2NoRefer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)2. CRANKSHAFT POSITION SENSOR SHORTED TO GROUND

Turn the ignition off.Disconnect the Crankshaft Position Sensor harness connector.Turn the ignition on.Measure the voltage of the (K853) Crankshaft Position Sensor 5 Volt Supply circuit at the Crankshaft Position Sensor harness connector.Is the voltage above 4.6 volts?YesReplace the Crankshaft Position Sensor.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To33. ACCELERATOR PEDAL POSITION SENSOR 1 SHORTED TO GROUND

Turn the ignition off.Disconnect the Accelerator Pedal Position Sensor harness connector.Turn the ignition on.Measure the voltage of the (K855) Accelerator Pedal Position Sensor 1 5 Volt Supply circuit at the Accelerator Pedal Position Sensor harness connector.Is the voltage above 4.6 volts?YesReplace the Accelerator Pedal Position Sensor.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoGo To44. 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Turn the ignition off.Disconnect the ECM harness connectors.Measure the resistance between ground and the (K853) Crankshaft Position Sensor 5 Volt Supply circuit at the Crankshaft Position Sensor harness connector.Measure the resistance between ground and the (F855) Accelerator Pedal Position Sensor 1 5 Volt Supply circuit at the Accelerator Pedal Position Sensor harness connector.Is the resistance above 1000 ohms for each circuit?YesGo To5NoRepair the 5-Volt Supply circuit for a short to ground.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)5. ENGINE CONTROL MODULE (ECM)Turn the ignition off.Inspect the (K853) Crankshaft Position Sensor 5 Volt Supply circuit between the Crankshaft Position Sensor harness connector and the ECM harness connector.Inspect the (F855) Accelerator Pedal Position Sensor 1 5 Volt Supply circuit between the Accelerator Pedal Position Sensor harness connector and the ECM harness connector.Look for any chafed, pierced, pinched, or partially broken wires.Look for broken, bent, pushed out or corroded terminals.Refer to any Technical Service Bulletins that may apply.Were any problems found?YesRepair as necessary.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)NoReplace and program the Engine Control Module in accordance with the Service Information.Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)