Component Inspection

Component Inspection

1. Ignition "ON" & Engine "OFF".
2. Put and release the brake pedal several times.
3. Measure voltage, waveform between terminal "1" of the pressure sensor (primary and secondary) harness connector and chassis ground.
A. Specification : 0.5V ~ 4.4V
Approx. 0.5V (in case of no braking)




4. Is the measured voltage, waveform within specifications?
YES
1) Fault is intermittent caused by faulty HECU or was repaired and HECU memory was not cleared. go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good pressure sensor and check for proper operation. If problem is corrected, replace pressure sensor and then go to "Verification of Vehicle Repair" procedure.