DTC Troubleshooting: 90
DTC 90:
 A/T Control System and/or PGM-FI System
  1. Check for A/T System DTCs with the HDS.
Are any DTCs indicated?
YES -
Troubleshoot the indicated A/T control system DTC(s).■
NO -
Go to Step 2 .
  1. Clear the DTCs with the HDS.
  1. Test-drive the vehicle.
  1. Check for DTCs with the HDS.
Is DTC 90 indicated?
YES -
Check for loose or poor connections. If the connections are OK, update the ACC unit, then recheck. If the ACC unit was already updated, replace the ACC unit. ■
NO -
Intermittent failure. The system is OK at this time. Check for loose or poor connections.■