DTC P004B:00 [PCM (SKYACTIV-D 2.2)]

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Note

•  To determine the malfunctioning part, proceed with the diagnostics from [Function inspection using M-MDS].

Details on DTCs

System malfunction location	Variable turbine geometry turbocharger actuator DC motor control circuit problem
Detection condition	Determination condition	•  The DC motor drive current of the variable turbine geometry turbocharger actuator or the temperature of the DC motor drive circuit exceeds the specification for a continuous 2.5 s.
	Preconditions	•  All of the following conditions are met. ―  Battery positive voltage: 8—16 V ―  0.5 s have elapsed after engine start
	Drive cycle	•  1
	Self-test type	•  CMDTC self test
	Sensor/unit used	•  Variable turbine geometry turbocharger actuator
Fail-safe	•  Limits engine torque. •  Inhibits the automatic diesel particulate filter regeneration control. •  Inhibits the manual diesel particulate filter regeneration control. •  Inhibits the boost control. •  Inhibits the EGR control. •  Stops the G-vectoring control (GVC). •  Limits the engine transaxle total control.
Vehicle status when DTCs are output	•  Check engine light turns on
Possible cause	•  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor connector or terminal malfunction •  Short to ground in wiring harness between the following terminals: ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A and PCM terminal 1CD ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B and PCM terminal 1BZ •  PCM connector or terminal malfunction •  Short to power supply in wiring harness between the following terminals ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A and PCM terminal 1CD ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B and PCM terminal 1BZ •  Variable turbine geometry turbocharger actuator malfunction •  PCM malfunction

System Wiring Diagram

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Function Explanation (DTC Detection Outline)

―  Current of variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A or temperature of circuit exceeds specification

―  Current of variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B or temperature of circuit exceeds specification

Repeatability Verification Procedure

PID Item/Simulation Item Used in Diagnosis

Function Inspection Using M-MDS

Step	Inspection	Results	Action
1	PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note •  Recording can be facilitated using the screen capture function of the PC. •  Record the freeze frame data/snap shot data.	—	Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

―  Perform an inspection of the variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor connector and PCM-related connectors.

―  Inspect the wiring harness between the variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor and PCM for deterioration.

―  Perform a unit inspection of the variable turbine geometry turbocharger actuator.

―  Verify that the primary malfunction is resolved and there are no other malfunctions.

Step	Inspection	Results	Action
1	PURPOSE: INSPECT VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR/VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR POSITION SENSOR CONNECTOR CONDITION •  Switch the ignition OFF. •  Disconnect the variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 6.
2	PURPOSE: INSPECT PCM CONNECTOR CONDITION •  Disconnect the PCM connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is the connector normal?	Yes	Go to the next step.
		No	Repair or replace the connector, then go to Step 6.
3	PURPOSE: INSPECT VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR CIRCUIT FOR SHORT TO GROUND •  Verify that the variable turbine geometry turbocharger actuator connector and the PCM connector are disconnected. •  Inspect between the following terminals (vehicle wiring harness side) for continuity. ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A and PCM terminal 1CD ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B and PCM terminal 1BZ •  Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. •  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A and PCM terminal 1CD •  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B and PCM terminal 1BZ If there is a common connector: ―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. ―  Repair or replace the malfunctioning location. If there is no common connector: ―  Repair or replace the wiring harness which is shorted to ground. Go to Step 6.
		No	Go to the next step.
4	PURPOSE: INSPECT VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR CIRCUIT FOR SHORT TO POWER SUPPLY •  Verify that the variable turbine geometry turbocharger actuator connector and the PCM connector are disconnected. •  Switch the ignition ON (engine off). Note •  Another DTC may be stored by the PCM detecting an open circuit. •  Measure the voltage at the following terminals (vehicle wiring harness side). ―   Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A ―  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B •  Is the voltage 0 V?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals. •  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal A and PCM terminal 1CD •  Variable turbine geometry turbocharger actuator/variable turbine geometry turbocharger actuator position sensor terminal B and PCM terminal 1BZ If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to the power supply. Go to Step 6.
5	PURPOSE: INSPECT VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR •  Inspect the variable turbine geometry turbocharger actuator. (See VARIABLE TURBINE GEOMETRY TURBOCHARGER ACTUATOR POSITION SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2]) •  Is the variable turbine geometry turbocharger actuator normal?	Yes	Go to the next step.
		No	Replace the variable turbine geometry turbocharger actuator, then go to the next step.
6	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Reconnect all disconnected connectors and hoses. •  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)]) •  Implement the repeatability verification procedure. (See Repeatability Verification Procedure) •  Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) •  Is DTC P004B:00 displayed?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
		No	Go to the next step.
7	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION •  Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)])
		No	DTC troubleshooting completed.