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Circuit/System Testing

NOTE:

Additional DTCs will set when disconnecting components.

Vehicle in Service Mode.
Test for 4.8-5.2V between the 5V reference circuit terminals listed below and ground:
- Accelerator Pedal Position Sensor X1 terminal 1
- Accelerator Pedal Position Sensor X1 terminal 6
- A/C Refrigerant Pressure Sensor X1 terminal 2
- If less than 4.8V
1. Vehicle Off, disconnect the harness connector at the K20 ECM.
2. Test for infinite resistance between the 5V reference circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance
3. Test for less than 2 Ω in the 5V reference circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K20 ECM.
- If greater than 5.2V
1. Ignition OFF, disconnect the harness connector at the K20 ECM, vehicle ON.
2. Test for less than 1V between the 5V reference circuit and ground.
  - If 1V or greater, repair the short to voltage on the circuit.
  - If less than 1V, replace the K20 ECM.
- If between 4.8-5.2V
Replace the appropriate sensor.