Auto A/C

ON-VEHICLE SERVICE

IDLE-UP OPERATION CHECK

1. Before inspection and adjustment, set vehicle in the following condition:
- Engine coolant temperature: 80-90 degrees C (176.0-194.0 degrees F)
- Lights, electric cooling fan and accessories: Set to OFF
- Transmission: Neutral ("N" or "P" position)
- Steering wheel: Straightforward

2. Check whether or not the idle speed is the standard value. Refer to Engine Mechanical, On-vehicle Service - Curb Idle Speed Check.

Standard value: 700 ± 50 r/min

3. When the A/C is running after turning the A/C switch to ON, and the blower knob to the Maximum air volume position, check to be sure that the idle speed is at the standard value.

Standard value
At low pressure: 700 ± 50 r/min
At high pressure: 840 ± 50 r/min

NOTE:
- The powertrain control module determines whether the A/C load is low or high according to the output signal from the A/C-ECU.
- It is not necessary to make an adjustment, because the idling speed is automatically adjusted by the ISC system. If, however, a deviation from the standard value occurs for some reason, check the ISC system.
- Check 4 minutes after idling begins.