Circuit/System Testing

Chevrolet/GMC

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 8 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 2 Ω or greater, repair the open/high resistance in the ground circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
   • Go to next step: If less than 10 Ω 
3. Verify the scan tool Parking Assist Switch parameter is Inactive.
   • If the parameter is not Inactive 
   1. Ignition OFF, disconnect the X1 harness connector at the K182 Parking Assist Control Module.
   2. Test for infinite resistance between the signal circuit terminal 3 and ground.
      • If less than infinite resistance, repair the short to ground on the signal circuit.
      • If infinite resistance, replace the K182 Parking Assist Control Module.
   • Go to next step: If the parameter is Inactive 
4. Connect a 3 A fused jumper wire between the signal circuit terminal 3 and ground.
5. Verify the scan tool Parking Assist Switch parameter is Active.
   • If the parameter is not Active 
   1. Ignition OFF, disconnect the X1 harness connector at the K182 Parking Assist Control Module, ignition ON.
   2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit
      • If less than 1 V, replace the K182 Parking Assist Control Module.
   3. Ignition OFF.
   4. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K182 Parking Assist Control Module.
   • Go to next step: If the parameter is Active 
6. Test or replace the S48A Multifunction Switch - Instrument Panel.

Cadillac

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel. It may take up to 2 min for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 5 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 2 Ω or greater, repair the open/high resistance in the ground circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
   • Go to next step: If less than 10 Ω 
3. Verify the scan tool Parking Assist Switch parameter is Inactive.
   • If the parameter is not Inactive 
   1. Ignition OFF, disconnect the X1 harness connector at the K182 Parking Assist Control Module.
   2. Test for infinite resistance between the signal circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the signal circuit.
      • If infinite resistance, replace the K182 Parking Assist Control Module.
   • Go to next step: If the parameter is Inactive 
4. Connect a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
5. Verify the scan tool Parking Assist Switch parameter is Active.
   • If the parameter is not Active 
   1. Ignition OFF, disconnect the X1 harness connector at the K182 Parking Assist Control Module, ignition ON.
   2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit
      • If less than 1 V, replace the K182 Parking Assist Control Module.
   3. Ignition OFF.
   4. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K182 Parking Assist Control Module.
   • Go to next step: If the parameter is Active 
6. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.