Engine Warmup Control

As the engine coolant approaches normal operating temperature, the need for cold fast idle is gradually eliminated. The ECU gradually steps the ISCV toward its seat during warmup. The warm curb idle position is represented by point C on the graph. By the time the coolant temperature reaches 176'F (80'C), the cold fast idle program has ended.

ENGINE WARM-UP CONTROL

Coolant Temperature °F

Coolant Temperature °F

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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