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DIAGNOSIS
Diagnostics >ECU communication<
ECU communication is used to exchange data between tester and system.
Communication is necessary for the following tasks:
reading/deleting fault memories
displaying parameters
carrying out actuator tests
carrying out basic settings
coding ECUs
resetting the service indicator
Steps:
1. Connect ST2 diagnostic cables to mega macs 42.
2. Switch on mega macs 42 with ENTER.
ATTENTION
Trouble-free communication is possible only if:
· all pins on the diagnostic socket are correctly assigned
· the vehicle is identied correctly
Identify the vehicle as exactly as possible.
· Voltage of vehicle electrical system is not lower 11.5 V If necessary use mains supply.
· all power consumers are turned o
· the diagnostic plug is connected to the vehicle
· accessory equipment, radio, CD changer etc. are connected correctly
· ignition ON
NOTE
Always turn o the ignition before connecting or disconnecting the diagnostic plug from the vehicle! If you wish
to read out several fault memories one after the other, turn o ignition after every readout process and turn on
again for the next process.
macs 42 Section E 1/5
mega macs 42
Diagnosis
OBD
Diagnostic folder
Settings
Switching o
26


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