Circuit/System Verification

Without UGN

1. Ignition ON.
2. Verify the Parking Assist Control Module Parking Assist Switch scan tool parameter changes between Active and Inactive while pressing and releasing the parking assist switch.
   • If the parameter does not change between Active and Inactive 

     Refer to Circuit/System Testing - Parking Assist Switch Circuit Malfunction without UGN.

   • If the parameter changes between Active and Inactive 
3. Verify the parking assist switch indicator turns On and Off while commanding the Parking Assist Control Module Parking Assist Switch LED On and Off with a scan tool.
   • If the indicator does not turn ON and OFF 

     Refer to Circuit/System Testing - Parking Assist Switch Indicator Circuit Malfunction without UGN.

   • If the indicator does turn ON and OFF 
4. Transmission in R.
5. Verify the Parking Assist Control Module Calculated Transmission Range scan tool parameter is Reverse.
   • If the parameter is not Reverse 

     Refer to Backup Lamps Malfunction .

   • If the parameter is Reverse 
6. Transmission in R.
7. Verify the scan tool Parking Assist System Status parameter displays Enabled.
   • If the parameter is not Enabled 

     Refer to Diagnostic Aids to determine the cause.

   • If the parameter is Enabled 
8. All OK.

With UGN

1. Ignition ON.
2. Verify the parking assist switch LED turns on and off while pressing and releasing the parking assist switch.
   • If the LED flashes and then goes out again 

     The system is disabled. Refer to Diagnostic Aids to determine the cause of the disable.

   • If the LED does not turn on and off 
   1. Verify the park assist LED turns on and off when commanding the Active Safety Control Module Parking Assist Switch LED parameter ON and OFF with a scan tool.
      • If the parking assist LED does not turn ON and OFF

        Refer to Circuit/System Testing - Parking Assist Switch Indicator Malfunction with UGN.

      • If the parking assist LED turns ON and OFF

        Refer to Circuit/System Testing - Parking Assist Switch Circuit Malfunction with UGN.

   • If the LED turns on and off 
3. Transmission in R.
4. Verify the Parking Assist Control Module Calculated Transmission Range scan tool parameter is Reverse.
   • If the parameter is not Reverse 

     Refer to Backup Lamps Malfunction .

   • If the parameter is Reverse 
5. Transmission in R.
6. Verify the scan tool Parking Assist System Status parameter displays Enabled.
   • If the parameter is not Enabled 

     Refer to Diagnostic Aids to determine the cause.

   • If the parameter is Enabled 
7. All OK.