Circuit/System Testing

Parallel Parking Assist Switch Malfunction

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 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. Ignition ON.
4. Verify a test lamp illuminates between the B+ circuit terminal 8 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 ignition 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 OK and there is voltage at the fuse. Refer to Power Mode Mismatch (With BTM)Power Mode Mismatch (Without BTM) .
   • If the test lamp does not illuminate and the circuit fuse is open 
   1. Ignition OFF.
   2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the S48D Multifunction Switch 2 - Instrument Panel.
   • Go to next step: If the test lamp illuminates 
5. Verify the scan tool Advanced Park Assist Switch parameter is Inactive.
   • If 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 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K182 Parking Assist Control Module.
   • Go to next step: If Inactive 
6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 5.
7. Verify the scan tool Advanced Park Assist Switch parameter is Active.
   • If 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 signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
   3. 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 Active 
8. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.