For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Powertrain Control Module (PCM) 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 3 provides 5 Volts to the Crankshaft Position Sensor, Engine Oil Pressure Sensor and the Accelerator Pedal Position Sensor No.1.
When Monitored:
With the ignition on.
Set Condition:
The Powertrain Control Module (PCM) detects a low voltage on the Sensor Supply 3 circuit for 0.10 second.
5.
CHECK THE 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND
1.
Turn the ignition off.
2.
Disconnect the PCM harness connectors.
3.
Measure the resistance between ground and the (K853) Crankshaft Position Sensor 5-Volt Supply circuit at the Crankshaft Position Sensor harness connector.
4.
Measure the resistance between ground and the (K855) Accelerator Pedal Position Sensor No.1 5-Volt Supply circuit at the APP Sensor harness connector.
5.
Measure the resistance between ground and the (K188) Engine Oil Pressure Sensor 5-Volt Supply circuit at the Engine Oil Pressure Sensor harness connector.
Is the resistance above 10k Ohms for each circuit?
Inspect the (K853) Crankshaft Position Sensor 5-Volt Supply circuit between the Crankshaft Position Sensor harness connector and the PCM harness connector.
3.
Inspect the (K188) Engine Oil Pressure Sensor 5-Volt Supply circuit between the Engine Oil Pressure Sensor harness connector and the PCM harness connector.
4.
Inspect the (F855) Accelerator Pedal Position Sensor No.1 5-Volt Supply circuit between the APP Sensor harness connector and the PCM harness connector.
5.
Look for any chafed, pierced, pinched, or partially broken wires.
6.
Look for broken, bent, pushed out or corroded terminals.
7.
Perform any Technical Service Bulletins that may apply.
