DTC Troubleshooting: 91

DTC 91:  F-CAN Communication

NOTE: Before performing this troubleshooting, troubleshoot the PGM-FI System first.

1.Check for DTCs in the ECM.

Are any DTCs indicated?

YES - Troubleshoot the ECM DTCs.n

NO - Check for loose connector terminals in the VSA control unit 46P connector and repair if necessary. If terminals are OK, replace the VSA modulator-control unit.n