xD L4-1.8L (2ZR-FE) (2008)
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Starter Motor: Testing and Inspection
Engine Control System - SFI System
2ZR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Holding Function Circuit
Cranking Holding Function Circuit
DESCRIPTION
The cranking holding control system keeps energizing the starter relay from when the ECM detects the starter signal (STSW signal) from the ignition
switch until the ECM performs a judgement of "Engine started". Furthermore, the ECM outputs an accessory cut signal (ACCR signal) to the ACC cut
relay during cranking to prevent flickering of the combination meter, clock, audio system, and so on.
When the ECM detects the STSW signal, the ECM outputs the starter relay drive signal (STAR signal) to the starter relay through the clutch start switch
or the park/neutral position switch, and then, the engine is cranked. When the ECM receives a stable engine speed signal (NE signal), more specifically,
when the NE signal reaches a predetermined value, the ECM stops outputting the STAR signal.
Also, the ECM monitors the starter relay operating conditions based on the STA terminal voltage status.
WIRING DIAGRAM
