Brake System Indicator Does Not Go Off, and No DTCs Are Stored
Brake system indicator does not go off, and no DTCs are stored1. Release the parking brake.
2. Turn the ignition switch ON (II).
3. Check the brake system indicator for several seconds when the ignition switch is turned ON (II).
Does the indicator come on then go off?
YES - Intermittent failure, the system is OK at this time. Check for loose terminals between the gauge control module (tach) connector (36P) and the ABS modulator-control unit 25P connector. Refer to intermittent failures troubleshooting.
NO - Go to step 4.
4. Check the BRAKE INDICATOR in the ABS DATA LIST with the HDS.
Does it indicate OFF?
YES - Go to step 5.
NO - Check for loose terminals in the ABS modulator-control unit 25P connector. If necessary, substitute a known-good ABS modulator-control unit and retest.
5. Check the brake fluid level in the master cylinder reservoir tank.
Is brake fluid level OK?
YES - Go to step 6.
NO - Do the brake pad inspection, and add the brake fluid, then go to step 1 and recheck.
6. Disconnect the brake fluid level switch 2P connector. Does the brake system indicator go off?
YES - Replace the brake fluid reservoir union (brake fluid level switch is included).
NO - Go to step 7.
7. Turn the ignition switch OFF.
8. Disconnect the gauge control module (tach) connector (36P).
9. 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 (tach) and the brake fluid level switch.
NO - Check for loose terminals in the gauge control module (tach) connector (36P). If necessary, substitute a known-good gauge control module (tach), then go to step 1 and recheck. If it is OK, replace the original gauge control module (tach).