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IDLE SPEED INSPECTION [ZJ, ZY (WITHOUT WU-TWC)]

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1. Verify that the idle speed is within the specification. (See IDLE SPEED ADJUSTMENT [ZJ, ZY (WITHOUT WU-TWC)].)

2. Verify that the engine speed 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 with any of the specified loads applied, inspect the IAC valve.
  • 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 [Without WU-TWC]

Load status | Idle speed (rpm) P, N position (ATX), Neutral (MTX)
--- | ---
No load | 650-750
A/C on (Refrigerant pressure switch off)
A/C on (Refrigerant pressure switch on) | 700-800
Electrical loads (Headlight, rear defroster, blower fan (2-step or more), cooling fans No.1 and 2) on
P/S on