VSA DTC Troubleshooting: 91
DTC 91:
 F-CAN Communication
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch OFF, then turn it ON (II).
  1. Check for DTCs with the HDS.
Is DTC 92 indicated with DTC 91 at the same time?
YES -
Do the DTC 92 troubleshooting. ■
NO -
If only DTC 91 is indicated, go to step 5. If no DTCs are indicated, intermittent failure, the system is OK at this time. Check for loose terminals between the yaw rate-lateral acceleration sensor 4P connector, the ECM connector A (44P), and the VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting.
  1. Turn the ignition switch OFF.
  1. Short the SCS line with the HDS.
  1. Disconnect the ECM connector A (44P).
  1. Disconnect the VSA modulator-control unit 46P connector.
  1. Check for continuity between VSA modulator-control unit 46P connector terminal No. 38, No. 39 and ECM connector A (44P) terminal No. 37, No. 36 individually.
Is there continuity?
YES -
Go to Step 10 .
NO -
Repair open in the wire between the ECM and the VSA modulator-control unit.■
  1. Disconnect the yaw rate-lateral acceleration sensor 4P connector.
  1. Turn the ignition switch ON (II).