DTC P0505 [13B-MSP]
id0102g1808500
DTC P0505 |
Idle air control system problem |
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DETECTION CONDITION
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• The PCM cannot control idle speed at the target idle speed during the KOER self test.
Diagnostic support note
• The MIL does not illuminate.
• PENDING CODE is not available.
• FREEZE FRAME DATA is not available.
• The DTC is not stored in the PCM memory.
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POSSIBLE CAUSE
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• Drive-by-wire control system malfunction
• A/C cut-off control malfunction
• Generator control system malfunction
• Intake-air line clogged
• Insufficient compression
• Fuel line pressure malfunction
• PCM malfunction
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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VERIFY RELATED SERVICE INFORMATION AVAILBAILITY
• 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 th 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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2
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VERIFY RELATED PENDING CODE OR STORED DTC
• Turn the ignition switch off, then to the ON position (engine off).
• Verify the related PENDING CODE or stored DTCs.
• Are other DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [13B-MSP].)
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No
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Go to the next step.
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3
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INSPECT DRIVE-BY-WIRE CONTROL SYSTEM OPERATION
• Perform the “Drive-by-wire Control System Inspection”.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
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No
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Go to the next step.
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4
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INSPECT A/C MAGNETIC CLUTCH OPERATION
• Turn the blower motor switch off.
• Is magnetic clutch still on?
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Yes
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Go to the “NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY”.
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No
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Go to the next step.
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5
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INSPECT GENERATOR CONTROL SYSTEM OPERATION
• Apply the electrical load at idle.
• Is the engine speed increased?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
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6
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INSPECT AIR CLEANER ELEMENT
• Remove the air cleaner element with engine running.
• Is the engine speed increased?
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Yes
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Clean or replace the air cleaner element, then go to Step 14.
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No
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Go to the next step.
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7
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INSPECT THROTTLE BODY PASSAGE
• Remove the throttle body.
• Is throttle body clogged?
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Yes
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Clean the throttle body passage or replace the throttle body, then go to Step 14.
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No
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Go to the next step.
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8
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INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
• Is there any malfunction?
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Yes
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Go to the next step.
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No
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Go to Step 13.
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9
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INSPECT METERING OIL PUMP
• Inspect the metering oil pump.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
Overhaul or replace the engine, then go to Step 14.
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No
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Go to the next step.
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10
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INSPECT ENGINE OIL CONDITION
• Inspect the engine oil condition.
• Is the engine oil condition normal?
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Yes
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Go to the next step.
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No
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Replace the engine oil.
Overhaul or replace the engine, then go to Step 14.
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11
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INSPECT OIL PRESSURE
• Inspect the oil pressure.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results.
Overhaul or replace the engine, then go to Step 14.
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No
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Go to the next step.
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12
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INSPECT OIL PASSAGE
• Inspect the oil pipe between metering oil pump and metering oil nozzle.
• Is there any malfunction?
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Yes
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Inspect and repair for leakage or clogging in the engine oil passage.
Overhaul or replace the engine, then go to Step 14.
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No
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Overhaul or replace the engine, then go to the next step.
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13
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INSPECT FUEL LINE PRESSURE
• Perform the ”FUEL LINE PRESSURE INSPECTION”.
• Is there any malfunction?
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Yes
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Replace the fuel pump unit, then go to the next step.
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No
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Go to the next step.
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14
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VERIFY TROUBLESHOOTING OF DTC P0505 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOER self test.
• Is the same DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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15
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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 [13B-MSP].)
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No
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DTC troubleshooting completed.
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