There are 3 general symptoms :
1. Dash lights light, starter does not engage. ( generally the RCM module )
2. Cranks over but does not start, 3 times , then nothing until you reset by disconnecting the battery : generally a SKREEM ( security module ) issue.
3. Tries to start, no 3 limit : generally the Crankshaft Position Sensor or harness contacts to it.