DTC P050A:00 [PCM (SKYACTIV-G)]
DTC P050A:00 [PCM (SKYACTIV-G)]
SM2334445
id0102t4301800
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Note
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• To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.
Details On DTCs
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Description |
Cold start IAC system performance problem |
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Detection condition
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Determination conditions
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• The difference between the actual engine speed and the target engine speed is 100 rpm or more.
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Preconditions
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• Engine speed: 500 rpm or more *1
• Engine coolant temperature: −10—45 °C {14—113 °F} *1
• Catalytic converter estimated temperature: 380 °C {716 °F} or less *1
• Vehicle speed: 0 km/h {0 mph} *1
• The following DTCs are not detected:
*1: Standard can be verified by displaying PIDs using M-MDS
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Malfunction determination period
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• 9 s period
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Drive cycle
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• 2
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Self test type
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• CMDTC self test
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Sensor used
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• CKP sensor
• ECT sensor No.1
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Fail-safe function
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• Limits intake air amount
• Stops high pressure fuel pump control
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Vehicle status when DTCs are output
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• Not applicable
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Possible cause
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• Air suction in intake air system
• Drive-by-wire control system malfunction
• Throttle valve malfunction
• PCM malfunction
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System Wiring Diagram
• Not applicable
Function Explanation (DTC Detection Outline)
• The PCM calculates the target engine speed appropriate to the engine conditions relative to the actual engine speed based on the CKP sensor signal and provides feedback to the drive-by-wire control (idling speed control). If the actual engine speed is lower or higher than 100 rpm relative to the target engine speed during cold-engine idling, the PCM determines a malfunction in the idling speed control, and stores a DTC.
Repeatability Verification Procedure
1. Leave the vehicle for 7 hours or more.
2. Start the engine and leave it idling for 1 min.
PID Item/Simulation Item Used In Diagnosis
PID/DATA monitor item table
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PIDs |
Reference |
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THRO_ANG_ACT
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Function Inspection Using M-MDS
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Step |
Inspection |
Results |
Action |
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1
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PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
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Yes
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Perform repair or diagnosis according to the available 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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PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is the DTC P050A:00 on freeze frame data?
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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 the troubleshooting procedure for DTC on freeze frame data.
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3
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PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data.
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—
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Go to the next step.
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4
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PURPOSE: INSPECT FOR OTHER RELATED DTCs
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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5
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PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY THROTTLE VALVE
• Switch the ignition ON (engine off).
• Access the THRO_ANG_ACT PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
• While gradually depressing the accelerator pedal, verify that PID monitor THRO_ANG_ACT value increases.
• Does the monitor value change according to the amount the accelerator pedal is depressed?
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Yes
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Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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No
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Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 2.
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Troubleshooting Diagnostic Procedure
Intention of troubleshooting procedure
• Step 1
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― Perform an intake air system parts inspection.
• Step 2
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― Perform a throttle valve related inspection.
• Repair completion verification
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― Verify that the primary malfunction is resolved and there are no other malfunctions.
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Step |
Inspection |
Results |
Action |
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1
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PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION
• Inspect the following parts of the intake air system for looseness, damage, and loss.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning location and perform the repair completion verification.
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No
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Go to the next step.
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2
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PURPOSE: DETERMINE INTEGRITY OF THROTTLE VALVE
• Inspect the throttle valve. (See THROTTLE BODY INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See THROTTLE BODY INSPECTION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
• Perform the Electronic Control Throttle Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G (US)].)
• Is there any malfunction?
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Yes
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Replace the throttle body and perform the repair completion verification.
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No
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Clean the throttle valve and perform the repair completion verification.
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Repair completion verification 1
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PURPOSE: VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (US))].)
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No
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Go to the next step.
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Repair completion verification 2
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PURPOSE: VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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