IDLE SPEED INSPECTION [ZY]

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1. Complete the engine tune-up preparation.

2. Verify that the engine speed (WDS: RPM PID) is within the specification when each load is applied. (The speed decrease just after the load is applied is not considered.)

• If the engine speed is not within the specification when a specified load is applied, inspect the related input parts, wiring harnesses, and connectors.

Idle-up speed

Load status

Idle speed (rpm)

P, N position (ATX)

Neutral (MTX)

No load

600-700

A/C on

Refrigerant pressure switch (middle pressure) is off

600-700

650-750

Refrigerant pressure switch (middle pressure) is on

700-800

Electrical loads on

Generator generating current value

32-40 A

600-700

650-750

above 40 A

700-800

Load status			Idle speed (rpm)
Load status			P, N position (ATX)	Neutral (MTX)
No load			600-700
A/C on	Refrigerant pressure switch (middle pressure) is off		600-700	650-750
A/C on	Refrigerant pressure switch (middle pressure) is on		700-800
Electrical loads on	Generator generating current value	32-40 A	600-700	650-750
Electrical loads on	Generator generating current value	above 40 A	700-800