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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1366 ((Audio (Radio) - Electrical Diagnostics) (RRM)) >> DTC Troubleshooting >> B1488-00-Cabin Eq Mismatch Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. Turn the radio on.
    3. With the scan tool, erase Radio DTCs.
    4. With the scan tool, read Radio DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. PERFORM PROXI-ALIGNMENT PROCEDURE 
    1. With the scan tool, perform the proxi-alignment procedure.
    2. With the scan tool, erase DTCs.
    3. Turn the ignition off, then back on.
    4. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  3

      No 

  3. CHECK THE CABIN EQUALIZATION CURVE NUMBER 
    1. With the scan tool in the BCM ECU Details Tab, Configuration button, record the Cabin Equalization Curve number.
    2. With the scan tool in the Radio ECU Details Tab, Configuration button, record the True value.
      NOTE:

      The Cabin EQ Curve value found in the BCM should match the True value found in the Radio.

      Do the Cabin EQ settings match one another?

      Yes 

      No 

      • Go To  4
  4. VERIFY COMMUNICATION WITH BCM 
    1. With the scan tool, read the active modules on the BUS.

      Does the scan tool show the BCM active on the BUS?

      Yes 

      • Go To  5

      No 

      • Refer to NO RESPONSE FROM ECU and perform the No Response From Body Control Module (BCM) diagnostic procedure.
  5. CHECK THE BCM FOR ACTIVE DTCs 
    1. With the scan tool, erase BCM DTCs.
    2. Turn the ignition off. Wait approximately 10 seconds.
    3. Turn the ignition on.
    4. With the scan tool, read BCM DTCs and record them on the repair order.

      Are any active DTCs present?

      Yes 

      No