Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read Park Assist Module DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK PARK ASSIST SENSOR 12 FOR INTERNAL SHORT
1. Disconnect Park Assist Sensor 12 harness connector.
2. With the scan tool, read Park Assist Module DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3
  No
  - Replace Park Assist Sensor 12 in accordance with the Service Information. Refer to SENSOR, PARK ASSIST, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (D712) PARK ASSIST SENSOR 12 SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Park Assist Module C3 harness connector.
3. Using a 12-volt test light connected to 12-volts check the (D712) Park Assist Sensor 12 Signal circuit at the Park Assist Module C3 harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the (D712) Park Assist Sensor 12 Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (D712) PARK ASSIST SENSOR 12 SIGNAL CIRCUIT FOR A SHORT TO BATTERY
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground check the (D712) Park Assist Sensor 12 Signal circuit at the Park Assist Module C3 harness connector for a short to battery.
  Does the test light illuminate brightly?
  
  Yes
  - Repair the (D712) Park Assist Sensor 12 Signal circuit for a short to battery.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (D712) PARK ASSIST SENSOR 12 SIGNAL CIRCUIT FOR AN OPEN
1. Measure the resistance of the (D712) Park Assist Sensor 12 Signal circuit between the Park Assist Module C3 harness connector and the Park Assist Sensor 12 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Park Assist Module in accordance with Service Information. Refer to MODULE, PARK ASSIST, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the (D712) Park Assist Sensor 12 Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .