Camry Solara

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Start engine. Warm engine to normal operating temperature. Ensure idle speed is within specification. See IDLE SPEED & MIXTURE in ON-VEHICLE ADJUSTMENTS - V6 & V8 article.
Turn ignition off. Apply parking brake and place transmission/transaxle in Neutral. Ensure A/C is off.
Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 on data link connector No. 1 located at passenger's side of engine compartment, near strut tower. See Fig 1.
Start engine and note engine speed. Engine speed should increase to 1000 RPM for 5 seconds and then return to idle speed. If engine speed is not as specified, test IAC valve resistance and IAC valve operation. Go to next step. If engine speed is as specified, remove jumper wire. Turn ignition off.
To test IAC valve resistance, ensure ignition is off. Disconnect electrical connector at IAC valve. IAC valve is located on lower area of throttle body. Using ohmmeter, checking resistance between +B terminal and each remaining terminal on IAC valve. See Fig 2.
Replace IAC valve if resistance is not within specification. See IAC VALVE RESISTANCE table.
To test IAC valve operation, remove IAC valve from throttle body. See THROTTLE BODY under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article. Apply battery voltage to +B terminal on IAC valve. Apply battery ground to proper terminal and ensure valve opens and closes. See Fig 3. Replace IAC valve if defective.
If IAC valve resistance is within specification and operates properly, check wiring circuit between Engine Control Module (ECM) and IAC valve. For illustration of ECM location, see Figure. For wiring diagram, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. If all components and wiring circuit are okay, but idle problem still exists, the air assist system may be defective. For testing of air assist system, see AIR ASSIST SYSTEM .

IAC VALVE RESISTANCE

Application

Ohms

Camry Solara

Cold ⁽¹⁾

17.0-24.5

Hot ⁽²⁾

21.5-28.5

⁽¹⁾	Cold is with temperature of 14-122°F (-10-50°C).

⁽²⁾	Hot is with temperature of 122-212°F (50-100°C).

Fig 1: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Camry Solara)

Fig 2: Testing Idle Air Control Valve Resistance (Camry Solara)

Fig 3: Testing Idle Air Control Valve Operation (Camry Solara)