DTC 65-21
DTC 65-21: Brake Fluid Level Stuck ON1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS. Turn the ignition switch OFF, then ON (II) again.
3. Check for DTCs with the HDS.
Is DTC 65-21 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the brake pedal position switch, the ECM/PCM, and the VSA modulator-control unit. Refer to intermittent failure.
4. Release the parking brake.
5. Turn the ignition switch ON (II).
6. Check the brake system indicator in the gauge control module after several seconds with ignition switch turned ON (II).
The indicator comes on then goes off?
YES - Go to step 8.
NO - Go to step 7.
7. Check the FLUID LEVEL in the DATA LIST with the HDS while moving the brake fluid reservoir tank float.
Does it indicate ON with float is lowered and OFF with float raised?
YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals between the brake fluid level switch, gauge control module, and VSA modulator-control unit. Refer to intermittent failure.
NO - Check for loose terminals in the VSA modulator-control unit 37P connector. If necessary, substitute a known-good VSA modulator-control unit and retest. If DTCs are not indicated, replace the VSA modulator-control unit.
8. Check the brake fluid level in the master cylinder reservoir tank.
Is brake fluid level OK?
YES - Go to step 9.
NO - Do the brake pad inspection, check for brake fluid leaks, repair leaks or replace worn pads, then go to step 1 and recheck.
9. Check the FLUID LEVEL in the DATA LIST with the HDS while moving the brake fluid reservoir tank float.
Does it indicate ON with float is lowered and OFF with float raised?
YES - Go to step 10.
NO - Replace the brake fluid reservoir tank (brake fluid level switch is included).
10. Turn the ignition switch OFF.
11. Disconnect the gauge control module 36P connector.
12. Disconnect the brake fluid level switch 2P connector.
13. Check for continuity between brake fluid level switch 2P connector terminal No. 2 and body ground.
Is there continuity?
YES - Repair short in the wire between the gauge control module and the brake level position switch.
NO - Substitute a known-good gauge control module, then go to step 1 and recheck. If no DTCs are indicated, replace the original gauge control module.