NO.9 FAST IDLE/RUNS ON [MZR 1.3, MZR 1.5]
id0103d7801500
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9 |
FAST IDLE/RUNS ON |
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DESCRIPTION
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• The engine speed continues during at fast idle after warm-up.
• The engine runs after the ignition switch is turned off.
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POSSIBLE CAUSE
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• ECT sensor malfunction
• Continuous memory DTC is stored
• Improper load signal input
• Air leakage from intake-air system
• Improper operation of drive-by-wire control system
• APP sensor malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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INSPECT COOLING SYSTEM FOR MALFUNCTION
• Access the ECT PID using the M-MDS.
• Start the engine and warm it up to normal operating temperature.
• Is the ECT PID value between 82—112 °C {180—234 °F}?
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Yes
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Go to the next step.
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No
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ECT PID value is higher than 112 °C {234 °F}:
• Go to the symptom troubleshooting “NO.17 COOLING SYSTEM CONCERNS-OVERHEATING”.
ECT PID value is less than 82 °C {180 °F}:
• Go to the symptom troubleshooting “NO.18 COOLING SYSTEM CONCERNS-RUNS COLD”.
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2
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VERIFY PCM DTC
• Perform the PCM DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.3, MZR 1.5].)
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No
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Go to the next step.
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3
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VERIFY CURRENT INPUT SIGNAL STATUS
• Access the following PIDs using the M-MDS:
• Are the PID values normal?
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Yes
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Go to the next step.
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No
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AC_REQ PID is not as specified:
• Inspect the climate control unit, refrigerant pressure switch (high and low pressure) and evaporator temperature sensor.
COLP PID is not as specified:
• Inspect the refrigerant pressure switch (middle pressure).
CPP PID is not as specified: (MTX)
• Inspect the CPP switch.
CPP/PNP PID is not as specified: (MTX)
• Inspect the neutral switch.
TR PID is not as specified: (ATX, CVT)
• Inspect the TR switch.
Repair or replace the malfunctioning part according to the inspection results.
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4
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INSPECT INTAKE-AIR SYSTEM FOR AIR LEAKAGE
• Is there air leakage felt or heard at the intake-air system components while racing the engine to higher speed?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
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No
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Inspect the following:
• Drive-by-wire control system operation
• APP sensor
Repair or replace the malfunctioning part according to the inspection results.
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5
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Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
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