Circuit/System Testing
WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 minutes for all vehicle systems to power down.
- Test for less than 10 Ω between each ground circuit terminal listed below and ground:
- Terminal 13
- Terminal 38
- If 10 Ω or greater
- Ignition OFF
- Test for less than 2 Ω in the ground circuit end to end.
- If 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
- Ignition ON.
- Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
- Ignition OFF.
- Test for less than 2 Ω in the B+ circuit end to end.
- If 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
- Ignition OFF.
- Test for infinite resistance between the B+ circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the Q5 Brake Pressure Modulator.
- Go to next step: If the test lamp illuminates
- Replace the Q5 Brake Pressure Modulator.
- Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
- If the DTC sets
Replace the K17 Electronic Brake Control Module.
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.