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HOMESERVICE MANUALSDODGE1993COLT L4-1468CC 1.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSIDLE SPEED MOTOR POSITION SENSORTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSSENSOR INSPECTION
1993 Dodge Colt L4-1468cc 1.5L SOHC

Sensor Inspection

1993 Dodge Colt L4-1468cc 1.5L SOHCSECTION Sensor Inspection


To test the motor position sensor located in the idle air control (IAC) motor, proceed as follows:

1. Connect a Scan Tool to the diagnostic connector and read the Idle Air Control Valve position.
2. With the engine at operating temperature, transmission in neutral (or PARK) and all accessories turned OFF, read the number of steps that the IAC motor is open.

Normal Value: 2-20 steps

NOTE: A new vehicle (with approx. 300 miles or less) the IAC valve position sensor may show as many as 20 steps more than normal.

3. Turn the air conditioner ON and read the number of steps that the IAC motor is open. The number of steps should increase to compensate for the extra engine load.

Normal Value: 8-50 steps

4. Turn the air conditioner OFF. The number of steps should return to the original value.
5. On vehicles with an automatic transmission, engage the brakes and place the transmission in DRIVE. Read the number of steps that the IAC motor is open. The number of steps should increase to compensate for the extra engine load.

Normal Value: 3-40 steps




RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.