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Here is our guide:
https://www.2carpros.com/articles/engine-idles-too-high
it sound like engine idle control is not working properly. because if the problem was vacuum leak engine rpm is always be high. check fault codes first.
The idle speed control actuator is the double coil type and has two coils. The two coils are driven by separate driver stages in the ECM. Depending on the pulse duty factor, the equilibrium of the magnetic forces of the two coils will result in different angles of the motor. In parallel to the throttle valve, a bypass hose line is arrange, where the idle speed actuator is inserted in.(check its location at picture 1)(circuit diagram picture 2).
check harness inspection procedure(picture 3).
actuator inspection.(picture 4)
1. Disconnect the connector at the idle speed control actuator.
2. Measure the resistance between terminals.
Standard value
Terminal 1 and 2 16.6-18.6 Ohms
Terminal 2 and 3 14.5-16.5 Ohms [at 20 °C (68 °F))
3. Connect the connector at the idle speed control actuator.
Troubleshooting Procedures(picture 5)
Trouble shooting hints
Open or short circuit is observed in idle air control system when ignition switch is turned on.(picture 6).
please run down these troubleshooting and report back.
Images (Click to make bigger)
Tuesday, February 5th, 2019 AT 11:44 AM