Circuit/System Testing

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 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the ground circuit terminal 2 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.
   • If less than 10 Ω 
3. Ignition ON.
4. Verify the scan tool Park Assist Switch parameter is Inactive.
   • If not Inactive 
   1. Ignition OFF, disconnect the harness connector X1 at the K41R Rear Parking Assist Control Module.
   2. Test for infinite resistance between the signal circuit terminal 5 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K41R Rear Parking Assist Control Module.
   • If Inactive 
5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground.
6. Verify the scan tool Park Assist Switch parameter is Active.
   • If not Active 
   1. Ignition OFF, disconnect the X1 harness connector at the K41R Rear 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.
      • 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 K41R Rear Parking Assist Control Module.
   • If Active 
7. Test or replace the S48D Multifunction Switch 2 - Instrument Panel.

Parking Assist Switch Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the S48D Multifunction Switch 2 - Instrument Panel. Ignition ON, interior dimming set to full bright.
2. Test for 0.6-3.2 V between the control circuit terminal 3 and ground.
   • If less than 0.6 V 
   1. Ignition OFF, disconnect the X1 harness connector at the K9 Body Control Module.
   2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
   3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, refer to Interior Backlighting Malfunction .
   • If greater than 3.2 V 
   1. Ignition OFF, disconnect the X1 harness connector at the K9 Body 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, refer to Interior Backlighting Malfunction .
   • If between 0.6-3.2 V 
3. Ignition OFF, disconnect the X1 harness connector at the K41R Rear Parking Assist Control Module, ignition ON.
4. Test for less than 1 V between the control circuit terminal 6 and ground.
   • If 1 V or greater 

     Repair the short to voltage on the circuit.

   • If less than 1 V 
5. Ignition OFF.
6. Test for infinite resistance between the control circuit terminal 6 and ground.
   • If less than infinite resistance 

     Repair the short to ground on the circuit.

   • If infinite resistance 
7. Test for less than 5 Ω between the X1 connector at the K41R Rear Parking Assist Control Module terminal 3 and S48D Multifunction Switch - Instrument Panel circuit terminal 6.
   • If greater than 5 Ω 

     Repair the open/high resistance in the circuit.

   • If less than 5 Ω 
8. Test or replace the S48D Multifunction Switch 2 - Instrument Cluster.
9. Verify the Park Assist Switch Indicator turns ON and OFF when cycling the parking assist switch.
   • If indicator does not turn on and off 

     Replace K41R Rear Parking Assist Control Module.

   • If indicator turns on and of  f
10. All OK.