For 1990-2009 cars only
- Block the wheels.
- Start the engine and charge the system to the air compressor governor cut-out point.
- Stop the engine.
- Check between the valve body and cover plate for air leakage. Air leakage at the exhaust port must not exceed a 25 mm (1 in) bubble in 5 seconds.
- Push in the trailer air supply knob.
- Inspect the exhaust port for any air leakage. The air leakage at the exhaust port must not exceed a 25 mm (1 in) bubble in 5 seconds.
- Start the engine and charge the system to the air compressor governor cut-out point.
- Stop the engine.
- Push in the park control knob.
- Inspect the exhaust port for any air leakage. The air leakage at the exhaust port must not exceed a 25 mm (1 in) bubble in 5 seconds.
- Remove the wheel blocks.
If air leakage is excessive, overhaul or replace the parking control valve.
If air leakage is excessive, overhaul or replace the parking control valve.
If the air leakage is excessive, overhaul or replace the parking control valve.
