Golf III L4-2.0L (ABA) (1995)
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Engine Control Module: Description and Operation
Shift Point Signal
A Shift Point Signal is also connected to the Motronic control module, the signal is directional IN only (PIN 18 - INPUT ONLY).
The shift point signal comes from the automatic transmission control module (TCM). The Motronic control module uses this signal to recognize upshifts
and downshifts of the automatic transmission.
For additional shifting comfort, The Motronic control module retards the ignition timing and therefore reduces engine torque during shift operations.
Self-diagnosis:
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Self-diagnosis (OBD) recognizes a continuous signal (short to ground) as a fault. The signal is then no longer accepted.
