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Home › Suzuki › 2013 › Kizashi Base, Automatic CVT Trans › Repair and Diagnosis › External Pages › Different car › Section 79 (Body Electrical Control System) › Diagnostic Information and Procedures › DTC B1120/B1901/B1902: BCM Internal Defect/Internal Control Module Memory Check Sum Error/Control Module Programming Error › DTC Troubleshooting

DTC Troubleshooting

WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS PROCEDURE

Step Action YES NO
1  DTC recheck 
  1. Disconnect negative (-) cable at battery.
  2. Connect negative (-) cable at battery.
  3. Perform DTC CONFIRMATION PROCEDURE  and then recheck DTC.

Is DTC B1120, B1901 or B1902 still detected? 		 Substitute a known-good BCM and recheck DTC. End.
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