Diagnostic Mode 08 - Request Control Of On-Board System, Test Or Component: Notes

Diagnostic Mode 08 is used to control the operation of an on-board system, test or component. A Mode 8 service can be used to turn on-board system ON or OFF, or to cycle an on-board system, test or component on or off for a specific period of time. The service can also be used to request system status or to report test results.

Test requirements 

• No DTCs stored in the DTC memory.
• Intake Air Temperature (IAT) maximum 60° C.
• Coolant temperature 80 -110° C.
• Throttle valve angle 12.0 - 16.0%.