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Home >> Jeep >> 2021 >> Cherokee Latitude Plus, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> (Left Blind Spot Sensor Module (BSM) (LBSS) - Electrical Diagnostics) >> DTC Troubleshooting >> B22A9-45-Ecu Internal Performance - Program Memory Failure >> Diagnostic Test
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Diagnostic Test

  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read LBSS DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. REPROGRAM LEFT BLIND SPOT MODULE IF THE DTC IS ACTIVE. 
    1. Reprogram the LBSS in accordance with the Service Information.
    2. With the scan tool, read LBSS DTCs.

      Does scan tool display active DTC?

      Yes 

      No 

      • Test complete. Reprogramming corrected the DTC.