DTC 86
DTC 86: F-CAN Communication1. Check the No. 18 (40 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES - Reinstall the fuse, and go to step 2.
NO - Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit.
2. Check the No. 18 (15 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Reinstall the fuse, and go to step 3.
NO - Replace the fuse, and retest.
3. Clear the DTC using the HDS.
4. Start and run the engine for at least 5 seconds then turn the engine off.
5. Check for DTCs using the HDS.
Is DTC 86 indicated?
YES - Go to step 6.
NO - Intermittent failure, the F-CAN communication line is OK at this time.
6. Check for DTCs in the PGM-FI system.
Are any DTCs indicated?
YES - Troubleshoot the PGM-FI DTCs.
NO - Go to step 7.
7. Disconnect the ECM/PCM connector A (31P), gauge control module connector A (30P), the VSA modulator-control unit 47P connector, and navigation control connector A (20P) if equipped.
8. Check for continuity between the wires.
Is there continuity between the wires?
YES - Check for poor connections at the VSA modulator-control unit. If the connections are OK, replace the VSA modulator-control unit.
NO - Intermittent failure; the system is OK at this time.