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Home >> Suzuki >> 2005 >> Grand Vitara LX, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> H27 Engine >> Diagnostic Information and Procedures >> DTC P1603: TCM Trouble Code Detected >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Yes No
1 Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to "ENGINE AND EMISSION CONTROL SYSTEM CHECK  ".
2 DTC check 
  1. Check DTC of TCM referring to "DTC CHECK ".

Is there any DTC(s)? 

 Go to applicable DTC troubleshooting. Substitute a known-good ECM and recheck.
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