Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
NOTE:
Refer to the following for the Fuel Pump Relay harness terminal identification.

Terminal 30 - passenger side rear

Terminal 85 - driver side rear

Terminal 87 - driver side front

Terminal 86 - passenger side front
Remove the KR23A Fuel Pump Relay from the electrical center.
Test for less than 10 Ω between the fuel pump control 2 circuit terminal 86 and ground.
- If greater than 10 Ω
  Repair the open/high resistance in the circuit.
- If less than 10 Ω
Connect a test lamp between the fuel pump control 1 circuit terminal 85 and ground.
Verify the test lamp turns ON and OFF when commanding the fuel pump relay ON and OFF with a scan tool.
- If the test lamp is always OFF
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the fuel pump control 1 circuit and ground.
  - If 1 V or greater, repair the short to voltage in the circuit.
  - If less than 1 V.
3. Ignition OFF.
4. Test for less than 2 Ω in the fuel pump control 1 circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω
5. Test for infinite resistance, between the fuel pump control 1 circuit and ground.
  - If less than infinite resistance, repair the short to ground in the circuit.
  - If infinite resistance, replace the K20 Engine Control Module.
- If the test lamp turns ON and OFF
Replace the KR23A Fuel Pump Relay.