DTC 85: F-CAN Communication Failure
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0), then turn the ignition switch to ON (II) again.
- Wait about 5 seconds.
- Check for DTCs with the HDS.
Is DTC 85 indicated?
YES - Go to step 6.
NO - Intermittent failure, the system is OK at this time.
- Test-drive the vehicle.
Does the speedometer work?
YES - Go to step 10.
NO - Go to step 7.
- Turn the ignition switch to LOCK (0).
- Disconnect the TPMS control unit 20P connector (see TPMS CONTROL UNIT REPLACEMENT ).
- Test-drive the vehicle.
Does the speedometer work?
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 - Turn the ignition switch to LOCK (0), and reconnect all connectors, then check and troubleshoot the fuel and emissions systems (see GENERAL TROUBLESHOOTING INFORMATION ).
- Turn the ignition switch to LOCK (0).
- Short the SCS line with the HDS.
- Disconnect ECM/PCM connector A (49P).
- Disconnect the TPMS control unit 20P connector (see TPMS CONTROL UNIT REPLACEMENT ).
- Check for continuity between the TPMS control unit 20P connector terminals and the ECM/PCM connector A (49P) terminals individually (see table below).CONNECTOR TERMINAL REFERENCE TABLE
Terminal Name TPMS Control Unit 20P Connector Terminal ECM/PCM Connector A (49P) Terminal F-CANL No. 11 No. 4 F-CANH No. 2 No. 3 Is Mere continuity?
YES - Check for loose terminals and poor connections at the TPMS control unit and G502. If necessary, substitute a known-good TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ), and recheck.
NO - Repair open in the wire between the TPMS control unit and the ECM/PCM.