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A/C Idle Up Circuit

A/C IDLE-UP CIRCUIT

CIRCUIT DESCRIPTION
When the air conditioning operates (increased engine load), this circuit switches the vacuum switching valve (VSV) ON and increases the amount of bypass air to increase the idle speed thus maintaining idle quality and driveability.

WIRING DIAGRAM

A/C Idle-up Vacuum Switching Valve Circuit:






INSPECTION PROCEDURE - With TOYOTA hand-held tester













INSPECTION PROCEDURE - With OBDII scan tool (excluding TOYOTA hand-held tester)