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DTC P1625: Immobilizer Antenna Error: Troubleshooting

WARNING: This page is about a different car, the 2007 Suzuki Grand Vitara and 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLESHOOTING CHART

Step Action YES NO
1  Diagnostic Trouble Code (DTC) confirmation 
  1. Clear DTC(s) referring to DIAGNOSTIC TROUBLE CODE (DTC) CLEARANCE .
  2. Turn the ignition switch to OFF position.
  3. Check if any DTC is detected referring to DIAGNOSTIC TROUBLE CODE (DTC) CHECK .

Is DTC P1625 still detected? 		 Go to Step 2. The troubleshooting is completed.
2  ICM replacement and Diagnostic Trouble Code (DTC) check 
  1. Replace ICM referring to IMMOBILIZER CONTROL MODULE (ICM) REMOVAL AND INSTALLATION .
  2. Check if DTC P1625 is still detected referring to DIAGNOSTIC TROUBLE CODE (DTC) CHECK .

Is DTC P1625 still detected? 		 Replace ECM with new one referring to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION , and then perform PROCEDURE AFTER ECM REPLACEMENT . The troubleshooting is completed.
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