Circuit/System Testing

Ignition "OFF" and all vehicle systems OFF, disconnect the harness connectors at the appropriate control module that is setting the DTC. It may take up to 2 min for all vehicle systems to power down.
Test for less than 10 Ω between each ground circuit terminal and ground.
- If 10 Ω or greater
1. Ignition "OFF".
2. Test for less than 2 Ω in the ground circuit end to end.
  - If the measured resistance is 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, repair the open/high resistance in the ground connection.
- Go to next step: If less than 10 Ω
Verify a test lamp illuminates between each B+ circuit terminal and ground.
- If the test lamp does not illuminate and the circuit fuse is good
1. Ignition "OFF".
2. Test for less than 2 Ω in the B+ circuit end to end.
  - If the measured resistance is 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
1. ignition "OFF".
2. Test for infinite resistance between the B+ circuit and ground.
  - If the measured resistance is not infinite, repair the short to ground in the circuit.
  - If the measured resistance is infinity, replace the corresponding control module.
- Go to next step: If the test lamp is ON

NOTE:

If the component is not equipped with an ignition circuit proceed to Step 6.