DTC P0506:00 [MZI-3.7]
id0102d2705000
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DTC P0506:00 |
IAC system RPM lower than expected |
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DETECTION CONDITION
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• This DTC is set when the PCM detects an engine idle speed that is less than the desired engine speed.
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POSSIBLE CAUSE
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• Engine mechanical concern
• Intake air restriction
• Vacuum leakage
• Exhaust restriction
• Sludged throttle body
• Throttle body malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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VERIFY RELATED PENDING OR STORED DTCS
• Turn the ignition switch off then to the ON position (Engine off).
• Verify pending code or stored DTCs using the M-MDS.
• Is other DTC present?
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Yes
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Repair applicable DTCs.
(See DTC TABLE [MZI-3.7].)
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No
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Go to the next step.
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4
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INSPECT AIR CLEANER ELEMENT
• Remove air cleaner element with the engine running.
• Is the engine speed increased?
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Yes
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Replace the air cleaner element, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT INTAKE AIR SYSTEM FOR EXCESSIVE AIR SUCTION
• Visually inspect the hose in intake air system for damages.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part, then go to Step 7.
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No
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Go to the next step.
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6
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INSPECT THROTTLE BODY PASSAGE
• Is the throttle body clogged?
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Yes
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Clean or replace the throttle body passage, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY TROUBLESHOOTING OF DTC P0506:00 HAS BEEN COMPLETED
• Verify that all disconnected connectors reconnected.
• Start the engine.
• Clear the DTC from the PCM memory using the M-MDS.
• Depress brake pedal for 14 s or more.
• Is PENDING CODE for this DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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8
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7].)
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No
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Troubleshooting completed.
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