Testing Diode In Hydraulic Unit
- Ignition on. Rotary switch to position 2. Multimeter set to DC volts position.
- Reading should be 0.4-1.5 volts. If less than 0.4 volts or greater than 1.5 volts, go to step 3).
- Check and replace valve relay or diode of hydraulic unit. Check connecting lines.
NOTE:
If ABS indicator light goes out upon replacement of
hydraulic unit with the ignition on and engine not running,
replace Electronic Control Unit.