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P21/P22 Delivery Test
The P21/P22 Delivery Test will check that the module is correctly plumbed to the brake chambers and test
the brake delivery air pressure. Park the vehicle on level ground and chock the wheels. During this test,
the delivery pressure should match the control pressure. After applying the brakes, the technician must
verify that the delivery and control pressures are the same. Bendix
®
ACom
®
Diagnostics system will then
release the brakes and the technician must verify that the brakes have released. The final step is for the
Bendix ACom Diagnostics software to re-apply the brakes.
Figure 36
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