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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control Module (BCM) - DTCS B1856-13 To U1701-87 >> DTC Troubleshooting >> B2131-09-HRLS (Humidity Rain Light Sensor) Rain Sensor - Component Failures >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR ACTIVE DTC 
    1. With the scan tool, read Body Control Module (BCM) DTCs and record on the repair order.
    2. Record the Environmental Data.
    3. With the scan tool, erase DTCs.
    4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    5. With the scan tool, read BCM DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CONFIGURE THE HUMIDITY RAIN LIGHT SENSOR (HRLS) 
    1. With the scan tool, program the HRLS to the vehicle configuration.
    2. With the scan tool, erase BCM DTCs.
    3. Cycle the ignition switch from off to on at least five times, leaving the ignition on for a minimum of 90 seconds at each cycle.
    4. With the scan tool, read the BCM DTCs.

      Does the DTC return?

      Yes 

      • Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Humidity Rain Light Sensor (HRLS) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No