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Home >> Toyota >> 2008 >> 4Runner Limited, 4.7 T, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2UZ-FE) - System And Circuit Testing, On-Vehicle Inspection, Removal, Inspection And Installation >> Cranking Holding Function Circuit >> Description

Cranking Holding Function Circuit: Description

The starter is controlled by the ECM. When the ECM detects a start signal (STSW) from the ignition switch, this system monitors the engine speed (NE) and continues to operate the starter until it has determined that the engine has started (engine speed reaches approximately 500 rpm). If the engine is already running and the ignition switch is turned to START, the ECM will not operate the starter.

Fig 1: Identifying Cranking Holding Function - System Description
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