Low Pressure Warning Switch Test

Turn ignition off. Ensure brake fluid level is okay and fluid level sensor switch float is in correct position (switch is in closed position). Ensure accumulator is fully charged and pump is not operating. Using an ohmmeter, check for continuity between ECU connector terminals No. 9 and 10. See Figure . If there is continuity, switch is okay. If contiuity does not exist, check wiring. If wiring is okay, replace switch, and retest.