Tracker 4WD V6-2.5L VIN 4 (2001)
Malfunction Indicator Lamp: Testing and Inspection
Malfunction Indicator Lamp (MIL) Always On
CIRCUIT DESCRIPTION
The Malfunction Indicator Lamp (MIL) is illuminated when the ignition is ON and the engine is OFF. Battery ignition voltage is supplied to the MIL.
The Powertrain Control Module (PCM) will turn the MIL ON by grounding the control circuit at the PCM. The MIL is normally off when the engine
is running. A steady MIL with the engine running suggests a short to ground in the MIL control circuit or a DTC is set in the powertrain control
system.
DIAGNOSTIC AIDS
Check for any of the following conditions.
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Check for a shorted MIL control circuit between the PCM and Instrument Panel Cluster (IPC) assembly.
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A shorted Instrument Panel Cluster (IPC) assembly board may cause the MIL to remain illuminated.
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Check for a faulty electrical connection to the PCM.
An intermittent malfunction may be caused by a fault in the MIL electrical circuit. Inspect the wiring harness and components for an intermittent
condition. Refer to Intermittent Conditions. See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Strategies/Intermittent
Conditions
TEST DESCRIPTION
Steps 1-6
The numbers below refer to the step numbers in the diagnostic table.
1
The Diagnostic System Check-Computers and Control Systems prompts the technician to complete some basic checks and store the Freeze Frame
data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the
scan tool for later reference.
2. This step checks for a short to ground in MIL control circuit.
3. This step checks for a short in the MIL control circuit between the PCM and the Instrument Panel Cluster (IPC) assembly.
