DTC 85: CAN Data Error

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the ignition switch OFF, then turn the ignition switch ON (II) again.
Wait about 5 seconds.
Check for DTCs with the HDS.
Is DTC 85 indicated?
1. YES - Go to step 6.
2. NO - The system is OK at this time.
Test-drive the vehicle.
Does the speedometer work?
1. YES - Go to step 10.
2. NO - Go to step 4.
Turn the ignition switch OFF.
Disconnect the TPMS control unit connector B (20P).
Test-drive the vehicle.
Does the speedometer work?
1. YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit (see TPMS Control Unit Replacement ), and recheck.
2. NO - Turn the ignition switch OFF, and reconnect all connectors, then check and troubleshoot the fuel and emissions systems (see GENERAL TROUBLESHOOTING INFORMATION ).
Turn the ignition switch OFF.
Short the SCS line with the HDS.
Disconnect PCM connector A (44P).
Disconnect the TPMS control unit connector B(20P).

Check for continuity between the TPMS control unit connector B (20P) and the PCM connector A (44P) individually.

TPMS CONTROL UNIT CONNECTOR AND PCM CONNECTOR TERMINALS REFERENCE FOR CONTINUITY CHECKING

Terminal name	TPMS control unit terminal No.	PCM terminal No.
CAN L	10	1
CAN H	19	36

Fig 1: Checking Continuity Between TPMS Control Unit Connector B (20P) And PCM Connector A (44P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit (see TPMS Control Unit Replacement ), and recheck.
NO - Repair open in the appropriate wire between TPMS control unit and PCM.