DTC 86-24, 86-25: F-CAN Communication With Engine Malfunction; F-CAN Communication With Engine Malfunction

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. (See General Troubleshooting Information ).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle. Drive the vehicle at 7 mph (10 km/h) or more.
NOTE: Drive the vehicle on a straight section of road, not on a lift.
Check for DTCs with the HDS.
Is DTC 86-24 and/or 86-25 indicated?

YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).
Turn the ignition switch to LOCK (0).
Short the SCS line with the HDS.
Disconnect ECM/PCM connector A (49P).
Disconnect the ABS modulator-control unit 25P connector (see step 3 ).

Check for continuity between the ABS modulator-control unit 25P connector terminal and ECM/PCM connector A (49P) terminal (see table).

TERMINAL CONNECTOR REFERENCE TABLE

Sign	ABS Modulator-control Unit 25P Connector Terminal	ECM/PCM Connector A (49P) Terminal
CAN-L	17	4
CAN-H	1	3

Is there continuity?

YES - Go to step 11.

NO - Repair open in the wire between the ECM/PCM and the ABS modulator-control unit.

Fig 1: Checking Continuity Between ABS Modulator-Control Unit 25P & ECM/PCM Connector A (49P) Terminal

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see ELD REPLACEMENT ) or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
Clear the DTC with the HDS.
Test-drive the vehicle. Drive tie vehicle at 7 mph (10 km/h) or more.
NOTE: Drive the vehicle on a straight section of road, not on a lift.
Check for DTCs with the HDS.
Is DTC 86-24 and/or 86-25 indicated?

YES - Check for loose terminals in the ABS modulator-control unit 25P connector. If the symptom/indication is still present, replace the ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).