571 SPN Fault Code

Name:

Retarder Enable – Brake Assist Switch

Description:

Switch signal which indicates whether the operator wishes the retarder to be enabled for vehicle braking assist. The retarder does not check this switch, nor does the enabling of this switch engage the retarder. When this switch is « enabled, » the devices constructing TSC1 – destination retarder messages may command retarder torque for braking. For example, the cruise control should not request retarder torque if this switch is not « enabled. » The switch exists to prevent the engine retarder from being asked to be engaged via TSC1 in a noise sensitive area. See also SPN 57200b = Retarder – brake assist disabled 01b = Retarder – brake assist enabled 10b = Error 11b = Not available

571 spn fault code name is Retarder Enable – Brake Assist Switch. If you don't take the time to look into 571 spn fault when it arises, it can add up quickly. One small issue like 571 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 571 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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