toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 1520 > < Initial Inspection and Diagnostic Overview
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Idle Up Control Valve: Component Tests and General Diagnostics

1. REMOVE A/C IDLE-UP VALVE.

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Disconnect the idle-up valve connector.

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Disconnect the 2 air hoses.

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Remove the 2 bolts and idle-up valve.

2. INSPECT A/C IDLE-UP VALVE.
A. Inspect idle-up valve for open circuit. 

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Using an ohmmeter, check that there is continuity between the terminals.

Resistance: At 20°C (68°F): 30 - 34 ohms 

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If there is no continuity, replace the idle-up valve.

B. Inspect A/C idle-up valve for ground. 

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Using an ohmmeter, check that there is no continuity between each terminal and the body.

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If there is continuity, replace the idle-up valve.

C. Inspect A/C idle-up valve operation.

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Check that air does not flow from port E to port F.

Initial Inspection and Diagnostic Overview|Page 1520 > < Initial Inspection and Diagnostic Overview