Tracker 4WD L4-1.6L VIN 6 (1998)
Idle Speed: Adjustments
Using A DMM
IMPORTANT: Before starting the engine, place the manual selector in P (automatic transaxle) or place the gearshift control lever in neutral (manual
transaxle), set the parking brake and block the drive wheels.
Check following for correct condition and operation.
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Check the accelerator cable for free movement and excessive play. Cable free play should be within specification.
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Inspect the lead wires and the hoses of the Sequential Multiport Fuel Injection (SFI) and the Evaporative Emission (EVAP) control systems for
being connected securely.
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Check the ignition timing. Adjust the ignition timing if necessary.
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Turn OFF all accessories (A/C, wipers, heater, lights, etc.).
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Make sure that the Air Cleaner (ACL) is installed correctly.
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Check the Air Induction system for restrictions.
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Check the vacuum hoses for correct routing. Refer to the Emission Label.
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Check for vacuum leaks, repair as necessary.
IMPORTANT:
The Idle Air Control (IAC) Calibration Mode is an internal function in the PCM, and is used to provide a base duty cycle. Therefore, when the vehicle
is in the IAC Calibration Mode (terminal 2 and 4 are jumpered on the Duty Check Data Link Connector) the IAC Duty Cycle will read approximately
50% and may seem to be out of specifications, this should be considered normal operation. When the AC Duty is OFF, the DMM will read
approximately 100% (0 volts).
When setting the IAC Duty, the duty cycle must be ON to obtain the correct reading. If the IAC Duty remains unchanged when the adjusting screw is
turned, check the duty output terminal circuit, A/C signal circuit, PSP switch signal circuit, PNP switch circuit (A/T) and ECT sensor performance.
Adjustment Procedure
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. Connect a tachometer.
4. Monitor the engine speed.
5. Connect a fused jumper wire from terminal 2 (diagnostic request ) to terminal 4 (ground) of the Duty Check Data Link Connector.
6. Connect a DMM (J-39200) from terminal 6 (duty check) to terminal 4 (ground) of the Duty Check Data Link Connector.
