H5 Check RR ABS Valve Operation

- Use NGS to command pump motor to run for four seconds. ("Trigger" must be pressed twice since each input will run motor for two seconds). This will ensure the accumulators are empty.

- Apply moderate brake pedal effort and have an assistant check that the RR wheel will not turn. If wheel turns, replace brake pressure control valve block.

- Have assistant check RR wheel immediately after pressing trigger (NGS will only energize valves for two seconds per trigger input).

- Did RR wheel turn freely (with a two foot lever arm such as a tire iron) while valves were energized?

YES -- Reverify symptom.

NO -- Verify no "ECU internal failure" or "valve circuit failure" codes are stored by running the "on-demand self test". If no codes are received, replace brake pressure control valve block.