Checking functions
Checking engine operating mode
Note:
Checks whether engine control unit recognises the engine operating modes idling, overrun, partial throttle and enrichment.
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
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◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
Test conditions
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● Coolant temperature must be at least 80 °C, =>display group 04, display zone 3.
Test sequence
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‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
(Connecting fault reader and selecting engine control unit .)
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