ABS (Without VSA)

ABS DTC Troubleshooting: 86-24, 86-25

DTC 86-24: F-CAN Communication With Engine Malfunction

DTC 86-25: F-CAN Communication With Engine Malfunction

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Test-drive the vehicle at 7 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.

4. Check for DTCs with the HDS.

Is DTC 86-24 and/or 86-25 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose terminals between ECM/PCM connector A (44P) and the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting. How To Troubleshoot The ABS (Without VSA)


5. Turn the ignition switch to LOCK (0).

6. Short the SCS line with the HDS.

7. Disconnect ECM/PCM connector A (44P): Except Si model, Service and Repair Si model. Service and Repair

8. Disconnect the ABS modulator-control unit 25P connector: Except Si model, Service and Repair Si model. Service and Repair

9. Check for continuity between ABS modulator-control unit 25P connector terminal and ECM/PCM connector A (44P) terminal (see table).





Is there continuity?
YES - Go to step 10.

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






10. Reconnect all connectors.

11. Update the ECM/PCM if it does not have the latest software: Except Si model, ECM/PCM Update Si model, ECM/PCM Update or substitute a known-good ECM/PCM: Except Si model, Reading and Clearing Diagnostic Trouble Codes Si model. Reading and Clearing Diagnostic Trouble Codes

12. Clear the DTC with the HDS.

13. Test-drive the vehicle at 7 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.

14. 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 necessary, substitute a known-good ABS modulator-control unit: Except Si model, Service and Repair Si model, Service and Repair and retest.

NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM: Except Si model, Service and Repair Si model. Service and Repair