To troubleshoot potential PCM issues, you should:
1. Check the Underhood Fuse Block: Inspect all fuses in this block carefully, looking for any that are blown or show signs of damage. Pay close attention to fuses related to power distribution and ignition systems. Consult your owner's manual for a fuse diagram.
2. Check the Interior Fuse Block (usually under the dash): Similar to the underhood block, carefully check all fuses here. Again, refer to your owner's manual for a diagram and fuse descriptions.
3. Check Relays: Relays are also involved in providing power to the PCM. Look for any that are clicking excessively or seem damaged.
Important Note: If you suspect a PCM issue, it's best to consult a professional mechanic or automotive electrician. Incorrectly diagnosing and trying to fix PCM problems can lead to further damage. A proper diagnostic scan tool is needed to determine the exact cause of any powertrain problems. Simply replacing fuses without understanding the underlying issue won't solve the problem.