Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the X2 and X3 connectors at the K182 Parking Assist Control Module.
Test for infinite resistance between the following voltage reference circuit terminals and ground:
- Terminal 4 X2
- Terminal 7 X3
- If less than infinite resistance
  Repair the short to ground on circuit 2374 or 6581.
- Go to next step: If infinite resistance
Ignition ON.
Test for less than 1 V between the following voltage reference circuit terminals and ground:
- Terminal 4 X2
- Terminal 7 X3
- If 1 V or greater
  Repair the short to voltage on circuit 2374 or 6581.
- Go to next step: If less than 1 V
Ignition OFF, connect the X2 and X3 connectors at the K182 Parking Assist Control Module.
Disconnect the connector at each B306 Parking Assist Alarm Sensor, ignition ON.
Verify DTC B1A30 is not set as current.
- If DTC B1A30 is set as current
  Replace the K182 Parking Assist Control Module.
- Go to next step: If DTC B1A30 is not set as current
Connect each B306 Parking Assist Alarm Sensor, one at a time. Verify DTC B1A30 is not set as current after connecting each B306 Parking Assist Alarm Sensor.
- If DTC B1A30 is set as current
  Replace the B306 Parking Assist Alarm Sensor that was connected immediately before DTC B1A30 set as current.
- Go to next step: If DTC B1A30 is not set as current
A fault is currently not present and may be an intermittent condition.