DTC P0172:00 [SKYACTIV-G 1.3, SKYACTIV-G 1.5]
id0102q1934300
Details On DTCs
DESCRIPTION |
Fuel trim system too rich |
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DETECTION CONDITION
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Determination conditions
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• Any one of the following conditions is met:
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Preconditions
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• Engine coolant temperature: 0—45 °C {32—113 °F}, 60 °C {140 °F} or more*1
*1: Value can be verified by displaying PIDs using M-MDS
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Malfunction determination period
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• 10 s or 20 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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• A/F sensor
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FAIL-SAFE FUNCTION
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• Not applicable
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VEHICLE STATUS WHEN DTCs ARE OUTPUT
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• Illuminates check engine light.
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POSSIBLE CAUSE
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• Erratic signal to PCM
• High-pressure side fuel delivery system malfunction
• Low-pressure side fuel delivery system malfunction
• Fuel injector malfunction
• Improper operation of purge control system
• MAF sensor malfunction
• MAP sensor malfunction
• Improper operation of electric variable valve timing control system
• Improper operation of hydraulic variable valve timing control system
• A/F sensor malfunction
• PCM malfunction
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System Wiring Diagram
Function Explanation (DTC Detection Outline)
am3zzw00017023
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am6zzw00011820
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Repeatability Verification Procedure
PID Item/Simulation Item Used In Diagnosis
PID/DATA monitor item table
Item |
Definition |
Unit |
Condition/Specification |
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APP
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Accelerator pedal opening angle (relative value) with the fully released status as 0% and fully depressed status as 100%
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%
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• Accelerator pedal released: Approx. 0%
• Accelerator pedal fully depressed: Approx. 100%
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ECT
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Engine coolant temperature input from ECT sensor
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°C, °F
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• Displays ECT
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ECT sensor voltage
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V
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Ignition switched ON (engine off)
• ECT is 29 °C {84 °F}: Approx. 2.65 V
Idle (after warm up)
• ECT is 88 °C {190 °F}: Approx. 0.71 V
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EVAPCP
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Purge solenoid valve control duty value
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%
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• Idle (after warm up): 0% (ECT 59 °C {140 °F} or less)
• Racing (Engine speed 2,000 rpm): 33—35% (ECT is 94 °C {201 °F})
• Racing (Engine speed 4,000 rpm): 53—55% (ECT is 94 °C {201 °F})
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FP
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Fuel pump relay operation status
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Off/On
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• Ignition switched ON (engine off): Off
• Cranking: On
• Idle (after warm up): On
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FUEL_PRES
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Fuel pressure input from fuel pressure sensor
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KPa {MPa}, mBar {Bar}, psi, in H20
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• Displays fuel pressure
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Fuel pressure sensor voltage
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V
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Ignition switched ON (engine off)
• Fuel pressure is approx. 16.91 MPa {172.4 kgf/cm2, 2453 psi}: Approx. 2.91 V
Idle (after warm up)
• Fuel pressure is 3.44—3.95 MPa {35.1—40.2 kgf/cm2, 499—572 psi}: 0.98—1.05 V (ECT is 90 °C {194 °F})
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IAT2
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IAT sensor No.2 voltage
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V
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• IAT2 is 20 °C {68 °F}: Approx. 3.57 V
• IAT2 is 40 °C {104 °F}: Approx. 2.70 V
• IAT2 is 60 °C {140 °F}: Approx. 1.87 V
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MAF
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Mass air flow input from MAF sensor
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g/Sec
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• Displays MAF
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MAF sensor voltage
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V
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• Ignition switched ON (engine off) (MAF: 0.59 g/s {0.078 lb/min}): Approx. 0.72 V
• Idle (after warm up) (MAF: 2.17 g/s {0.287 lb/min}): Approx. 0.97 V
• Racing (engine speed is 2,000 rpm) (MAF: 4.73 g/s {0.626 lb/min}): Approx. 1.26 V
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MAP
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Manifold absolute pressure input from MAP sensor
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KPa {MPa}, mBar {Bar}, psi, in H20
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• Displays MAP
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MAP_V
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MAP sensor voltage
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V
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• Ignition switched ON (engine off) (MAP:101 kPa {1.03 kgf/cm2, 14.6 psi}): Approx. 4.12 V
• Idle (after warm up) (MAP: 33 kPa {0.34 kgf/cm2, 4.8 psi}): Approx. 1.9 V
• Racing (engine speed is 2,000 rpm) (MAP: 26 kPa {0.27 kgf/cm2, 3.8 psi}): Approx. 1.23 V
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O2S11
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A/F sensor current
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µA
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• Idle (after warm up): 0—50 µA
• Deceleration fuel cut (accelerator pedal released from engine speed of 4,000 rpm or more): Approx. 3.84 mA
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TP_REL
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Throttle valve opening angle (relative value) with value at throttle valve fully close timing as the start point
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%
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• Accelerator pedal released: Approx. 12%
• Accelerator pedal fully depressed: Approx. 82%
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VT_EX_ACT
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Actual intake valve timing
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Actual exhaust valve timing
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°
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Displays actual intake valve timing
Idle (after warm up)
Racing (engine speed is 2,000 rpm)
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Displays actual exhaust valve timing
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VT_EX_DES
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Desired intake valve timing
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Desired exhaust valve timing
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°
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Displays desired intake valve timing
Idle (after warm up)
Racing (engine speed is 2,000 rpm)
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Displays desired exhaust valve timing
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VT_IN_ACT
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Actual intake valve timing
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°
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Displays in the M-MDS but it does not operate.
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Displays actual intake valve timing
Idle (after warm up)
Racing (engine speed is 2,000 rpm)
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VT_IN_DES
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Desired intake valve timing
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°
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SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system)
• Displays in the M-MDS but it does not operate.
SKYACTIV-G 1.5 (with 4-2-1 exhaust system)
• Displays desired intake valve timing
Idle (after warm up)
Racing (engine speed is 2,000 rpm)
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Simulation item table
Item |
Definition |
Unit |
Operation |
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INJ_1
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Fuel injector No.1
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OFF
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• Select OFF to forcibly stop fuel injector No.1.
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INJ_2
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Fuel injector No.2
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OFF
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• Select OFF to forcibly stop fuel injector No.2.
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INJ_3
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Fuel injector No.3
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OFF
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• Select OFF to forcibly stop fuel injector No.3.
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INJ_4
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Fuel injector No.4
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OFF
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• Select OFF to forcibly stop fuel injector No.4.
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Function Inspection Using M-MDS
STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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PURPOSE: 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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2
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PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is the DTC P0172:00 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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RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (fuel system related) on the repair order.
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—
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Go to the next step.
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4
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PURPOSE: VERIFY IF INPUT SIGNAL TO PCM AFFECTS FUEL INJECTION
• Start the engine.
• Access the following PIDs using the M-MDS:
• Is there any signal that is far out of specification?
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Yes
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Inspect the suspected sensor and related wiring harness.
• If there is any malfunction:
• If there is no malfunction:
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No
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Go to the next step.
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5
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PURPOSE: VERIFY CONNECTOR CONNECTIONS
• Start the engine.
• Access the following PIDs using the M-MDS:
• When the following parts are shaken, does the PID value include a PID item which has changed?
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Yes
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Repair or replace the applicable connector parts.
Go to the troubleshooting procedure to perform the procedure from Step 13.
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No
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Go to the next step.
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6
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PURPOSE: VERIFY FUEL PRESSURE (HIGH-SIDE) MALFUNCTION
• Switch the ignition off.
• Reconnect all disconnected connectors.
• Start the engine and idle it.
• Access the FUEL_PRES PID using the M-MDS.
• Is the FUEL_PRES PID value approx. 3 MPa {31 kgf/cm2, 435 psi}?
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Yes
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Go to the next step.
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No
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FUEL_PRES PID value is lower than 3 MPa {31 kgf/cm2, 435 psi}:
• Go to the troubleshooting procedure to perform the procedure from Step 1.
FUEL_PRES PID value is higher than 3 MPa {31 kgf/cm2, 435 psi}:
• Go to Step 8.
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7
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PURPOSE: VERIFY FUEL PRESSURE (LOW-SIDE) MALFUNCTION
• Bleed the remaining pressure in the fuel line using the following procedure.
• Switch the ignition off.
• Install the fuel pump relay.
• Switch the ignition ON (engine off).
• Display PID FUEL_PRES and simulation item FP using the M-MDS.
• Turn simulation item FP on.
• Is the FUEL_PRES PID value 430 kPa {4.38 kgf/cm2, 62.4 psi} or more?
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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 to perform the procedure from Step 1.
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8
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PURPOSE: VERIFY IF MALFUNCTION CAUSED BY FUEL INJECTOR IMPROPER OPERATION
• Switch the ignition off.
• Reconnect all disconnected connectors.
• Start the engine and idle it.
• Access the following simulation items using the M-MDS:
• Turn each fuel injector from on to off using the simulation items.
• Does the vibration during idling worsen?
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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 to perform the procedure from Step 3.
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9
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PURPOSE: VERIFY IF MALFUNCTION CAUSED BY PURGE SOLENOID VALVE IMPROPER OPERATION
• Start the engine and idle it.
• Access the EVAPCP PID using the M-MDS.
• Is the EVAPCP PID value normal?
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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 to perform the procedure from Step 4.
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10
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PURPOSE: VERIFY MAF SENSOR
• Start the engine and idle it.
• Access the MAF PID using the M-MDS.
• Is the MAF PID value normal?
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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 to perform the procedure from Step 5.
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11
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PURPOSE: VERIFY MAP SENSOR
• Start the engine and idle it.
• Access the following PIDs using the M-MDS:
• Are all items normal?
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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 to perform the procedure from Step 7.
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12
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PURPOSE: VERIFY INTAKE VALVE TIMING
• Start the engine and idle it.
• Access the following PIDs using the M-MDS:
• Depress the accelerator pedal to increase the engine speed.
• Does the monitor value of the PID item VT_IN_ACT conform to the VT_IN_DES PID value? (SKYACTIV-G 1.5 (with 4-2-1 exhaust system))
• Does the monitor value of the PID item VT_EX_ACT conform to the VT_EX_DES PID value? (SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system))
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Yes
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SKYACTIV-G 1.5 (with 4-2-1 exhaust system):
• Go to the next step.
SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system):
• Go to Step 14.
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No
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SKYACTIV-G 1.5 (with 4-2-1 exhaust system):
• Go to the troubleshooting procedure to perform the procedure from Step 8.
SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system):
• Go to the troubleshooting procedure to perform the procedure from Step 11.
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13
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PURPOSE: VERIFY EXHAUST VALVE TIMING
• Start the engine and idle it.
• Access the following PIDs using the M-MDS:
• Perform the following:
• Does the monitor value of the PID item VT_EX_ACT conform to the VT_EX_DES PID value?
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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 to perform the procedure from Step 11.
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14
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PURPOSE: VERIFY A/F SENSOR
• Access the O2S11 PID using the M-MDS.
• Is the O2S11 PID value normal?
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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 to perform the procedure from Step 12.
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15
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PURPOSE: VERIFY DTC
• Switch the ignition off, then ON (engine off).
• Retrieve the PCM DTCs using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
Go to the troubleshooting procedure to perform the procedure from Step 1.
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No
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Go to the troubleshooting procedure to perform the procedure from Step 1.
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Troubleshooting Diagnostic Procedure
STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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PURPOSE: DETERMINE INTEGRITY OF FUEL PUMP CONTROL MODULE
• Inspect the fuel pump control module.
• Is there any malfunction?
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Yes
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Replace the fuel pump control module, then go to Step 13.
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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 FUEL PUMP UNIT
• Inspect the fuel pump unit.
• Is there any malfunction?
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Yes
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Replace the fuel pump unit, then go to Step 13.
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No
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Go to the next step.
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3
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PURPOSE: DETERMINE INTEGRITY OF FUEL INJECTOR
• Inspect the fuel injector.
• Is there any malfunction?
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Yes
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Replace the fuel injector, then go to Step 13.
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No
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Go to the next step.
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4
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PURPOSE: DETERMINE INTEGRITY OF PURGE SOLENOID VALVE
• Inspect the purge solenoid valve.
• Is there any malfunction?
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Yes
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Replace the purge solenoid valve, then go to Step 13.
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No
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Go to the next step.
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5
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PURPOSE: DETERMINE INTEGRITY OF MAF SENSOR
• Inspect the MAF sensor.
• Is there any malfunction?
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Yes
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Replace the MAF sensor/IAT sensor No.1, then go to Step 13.
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No
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Go to the next step.
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6
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PURPOSE: AIR CLEANER ELEMENT
• Remove the air cleaner element with the engine is running.
• Does the engine speed increase?
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Yes
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Inspect the air cleaner element.
• If there is any malfunction:
• If there is no malfunction:
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No
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Go to the next step.
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7
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PURPOSE: DETERMINE INTEGRITY OF MAP SENSOR
• Reconnect all disconnected connectors.
• Inspect the MAP sensor.
• Is there any malfunction?
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Yes
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Replace the MAP sensor/IAT sensor No.2, then go to Step 13.
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No
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SKYACTIV-G 1.5 (with 4-2-1 exhaust system):
• Go to the next step.
SKYACTIV-G 1.3, SKYACTIV-G 1.5 (with 4-1 exhaust system):
• Go to Step 11.
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8
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PURPOSE: DETERMINE INTEGRITY OF ELECTRIC VARIABLE VALVE TIMING DRIVER
• Inspect the electric variable valve timing driver.
• Is there any malfunction?
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Yes
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Replace the electric variable valve timing motor/driver, then go to Step 13.
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No
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Go to the next step.
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9
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PURPOSE: DETERMINE INTEGRITY OF ELECTRIC VARIABLE VALVE TIMING MOTOR
• Inspect the electric variable valve timing motor.
• Is there any malfunction?
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Yes
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Replace the electric variable valve timing motor/driver, then go to Step 13.
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No
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Go to the next step.
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10
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PURPOSE: DETERMINE INTEGRITY OF ELECTRIC VARIABLE VALVE TIMING ACTUATOR
• Inspect the electric variable valve timing actuator.
• Is there any malfunction?
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Yes
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Replace the electric variable valve timing actuator, then go to Step 13.
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No
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Go to the next step.
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11
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PURPOSE: DETERMINE INTEGRITY OF OCV
• Inspect the OCV.
• Is there any malfunction?
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Yes
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Replace the OCV, then go to Step 13.
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No
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Go to the next step.
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12
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PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR
• Inspect the A/F sensor.
• Is there any malfunction?
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Yes
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Replace the A/F sensor, then go to the next step.
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No
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Go to the next step.
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13
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PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION
• Always reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Implement the repeatability verification procedure.
• Perform the Pending Trouble Code Access Procedure.
• Is the 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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DTC troubleshooting completed.
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