Circuit/System Testing

Park Assist Switch Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 Ω between the S48A Multifunction Switch - Instrument Panel 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 ground 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 Parking Assist Switch parameter is Inactive.
   • If not Inactive 
   1. Ignition OFF, disconnect the harness connector 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 Parking Assist Switch parameter is Active.
   • If not Active 
   1. Ignition OFF, disconnect the 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 S48A Multifunction Switch - Instrument Panel.

Parking Assist Switch Indicator Malfunction

1. Ignition OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
2. Test for less than 10 Ω between the S48A Multifunction Switch - Instrument Panel 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. Connect a test lamp between the voltage circuit terminal 3 and control circuit terminal 6.
4. Verify the test lamp turns ON and OFF when commanding the Parking Assist Switch LED On and Off with a scan tool.
   • If the test lamp is always OFF 
   1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.
   2. Test for infinite resistance between the voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground in 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, replace the K41R Rear Parking Assist Control Module.
   • If the test lamp is always ON 
   1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module, ignition ON.
   2. Test for less than 1 V between the voltage circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K41R Rear Parking Assist Control Module.
   • If the test lamp turns ON and OFF 
5. All OK.