DTC 65: Brake Fluid Level Low

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Check the brake fluid level in the master cylinder reservoir tank (see BRAKE SYSTEM BLEEDING ).
Is the brake fluid level OK?

YES -Go to step 2.

NO -Inspect the brake pads: Front (see FRONT BRAKE PAD INSPECTION AND REPLACEMENT ), rear (see REAR BRAKE PAD INSPECTION AND REPLACEMENT ), and replace worn out brake pads, then recheck.
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Disconnect the brake fluid level switch 2P connector (see step 1 on PARKING BRAKE SWITCH TEST ).
Turn the ignition switch to ON (II).
Check for DTCs with the HDS.
Is DTC 65 indicated?

YES -Go to step 8.

NO -Replace the master cylinder (see MASTER CYLINDER REPLACEMENT ).
Turn the ignition switch to LOCK (0).
Disconnect the gauge control module 32P connector (see step 3 on GAUGE CONTROL MODULE REPLACEMENT ).
Check for continuity between brake fluid level switch 2P connector terminal No. 1 and body ground.

Fig 1: Checking Continuity Between Brake Fluid Level Switch 2P Connector Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair a short to body ground in the wire between the gauge control module and the brake fluid level switch.

NO -Go to step 11.
Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ). If the unit already has the latest software, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
Check for DTCs with the HDS.
Is DTC 65 indicated?

YES -Check for loose terminals in the VSA modulator-control unit 32P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO -If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ). If any other DTCs are indicated, go to the indicated DTCS TROUBLESHOOTING .