Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Suzuki >> 2007 >> Grand Vitara Base, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information And Procedures >> DTC P1603: TCM Trouble Code Detected >> DTC Troubleshooting

DTC Troubleshooting

TROUBLESHOOTING TABLE

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

Is there any DTC(s)? 
Go to applicable DTC troubleshooting. Substitute a known good ECM and recheck.