DTC P0406:00 [PCM (SKYACTIV-D 2.2)]

id0102j5155500

DTC P0406:00

EGR valve position sensor circuit high input

DETECTION CONDITION

•  With the following conditions met, the output voltage of the EGR valve position sensor exceeds 4.71 V for a continuous 1.5 s.

―  Battery positive voltage: 8—16 V

―  0.5 s have elapsed after ignition is switched ON (engine off or on)

―  The following DTCs are not detected

•  Constant voltage power supply control system: P0652:00, P0653:00

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Limits engine torque.

•  Inhibits the automatic diesel particulate filter regeneration control.

•  Inhibits the manual diesel particulate filter regeneration control.

•  Inhibits the EGR control.

POSSIBLE CAUSE

•  EGR valve connector or terminal malfunction

•  PCM connector or terminal malfunction

•  Short to power supply in wiring harness between EGR valve terminal D and PCM terminal 1AQ

•  Short circuit in EGR valve position sensor power supply circuit and signal circuit

•  Open circuit in wiring harness between the following terminals:

―  EGR valve terminal D and PCM terminal 1AQ

―  EGR valve terminal C and PCM terminal 1Q

•  EGR valve position sensor malfunction

•  PCM malfunction

DTC P0406:00	EGR valve position sensor circuit high input
DETECTION CONDITION	• With the following conditions met, the output voltage of the EGR valve position sensor exceeds 4.71 V for a continuous 1.5 s. ― Battery positive voltage: 8—16 V ― 0.5 s have elapsed after ignition is switched ON (engine off or on) ― The following DTCs are not detected • Constant voltage power supply control system: P0652:00, P0653:00 Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Limits engine torque. • Inhibits the automatic diesel particulate filter regeneration control. • Inhibits the manual diesel particulate filter regeneration control. • Inhibits the EGR control.
POSSIBLE CAUSE	• EGR valve connector or terminal malfunction • PCM connector or terminal malfunction • Short to power supply in wiring harness between EGR valve terminal D and PCM terminal 1AQ • Short circuit in EGR valve position sensor power supply circuit and signal circuit • Open circuit in wiring harness between the following terminals: ― EGR valve terminal D and PCM terminal 1AQ ― EGR valve terminal C and PCM terminal 1Q • EGR valve position sensor malfunction • PCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED 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 next step.

2

INSPECT EGR VALVE CONNECTOR CONDITION

•  Switch the ignition OFF.

•  Disconnect the EGR valve 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 8.

3

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 8.

4

INSPECT EGR VALVE POSITION SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

•  Verify that the EGR valve connector and 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 EGR valve terminal D (vehicle wiring harness side).

•  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 EGR valve terminal D and PCM terminal 1AQ.

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 8.

5

INSPECT EGR VALVE POSITION SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT CIRCUIT

•  Verify that the EGR valve connector and PCM connector are disconnected.

•  Switch the ignition OFF.

•  Inspect for continuity between EGR valve terminals B and D (vehicle wiring harness side).

•  Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between the following terminals.

•  EGR valve terminal B and PCM terminal 1AP

•  EGR valve terminal D and PCM terminal 1AQ

If there is a common connector:

―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short circuit to determine the malfunctioning location.

―  Repair or replace the malfunctioning location.

If there is no common connector:

―  Repair or replace the malfunctioning wiring harness.

Go to Step 8.

No

Go to the next step.

6

INSPECT EGR VALVE POSITION SENSOR CIRCUIT FOR OPEN CIRCUIT

•  Verify that the EGR valve connector and PCM connector are disconnected.

•  Inspect between the following terminals (vehicle wiring harness side) for continuity.

―  EGR valve terminal D and PCM terminal 1AQ

―  EGR valve terminal C and PCM terminal 1Q

•  Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify if there is a common connector between the following terminals.

•  EGR valve terminal D and PCM terminal 1AQ

•  EGR valve terminal C and PCM terminal 1Q

If there is a common connector:

―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.

―  Repair or replace the malfunctioning location.

If there is no common connector:

―  Repair or replace the wiring harness which has an open circuit.

Go to Step 8.

7

INSPECT EGR VALVE POSITION SENSOR

•  Reconnect all the disconnected connectors.

•  Inspect the EGR valve position sensor.
(See EGR VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 2.2].)

•  Is the EGR valve position sensor normal?

Yes

Go to the next step.

No

Replace the EGR valve, then go to the next step.

(See EGR VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

8

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

•  Reconnect all the disconnected connectors.

•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
(See CLEARING DTC [PCM (SKYACTIV-D 2.2)].)

•  Perform the KOEO or KOER self-test.
(See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)].)

•  Has DTC P0406:00 been recorded?

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.

9

VERIFY OTHER DTCs

•  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.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED 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 next step.
2	INSPECT EGR VALVE CONNECTOR CONDITION • Switch the ignition OFF. • Disconnect the EGR valve 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.
2		No	Repair or replace the connector, then go to Step 8.
3	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.
3		No	Repair or replace the connector, then go to Step 8.
4	INSPECT EGR VALVE POSITION SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the EGR valve connector and 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 EGR valve terminal D (vehicle wiring harness side). • Is the voltage 0 V?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify if there is a common connector between EGR valve terminal D and PCM terminal 1AQ. 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 8.
5	INSPECT EGR VALVE POSITION SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT CIRCUIT • Verify that the EGR valve connector and PCM connector are disconnected. • Switch the ignition OFF. • Inspect for continuity between EGR valve terminals B and D (vehicle wiring harness side). • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. • EGR valve terminal B and PCM terminal 1AP • EGR valve terminal D and PCM terminal 1AQ If there is a common connector: ― Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short circuit to determine the malfunctioning location. ― Repair or replace the malfunctioning location. If there is no common connector: ― Repair or replace the malfunctioning wiring harness. Go to Step 8.
5		No	Go to the next step.
6	INSPECT EGR VALVE POSITION SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the EGR valve connector and PCM connector are disconnected. • Inspect between the following terminals (vehicle wiring harness side) for continuity. ― EGR valve terminal D and PCM terminal 1AQ ― EGR valve terminal C and PCM terminal 1Q • Is there continuity?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals. • EGR valve terminal D and PCM terminal 1AQ • EGR valve terminal C and PCM terminal 1Q If there is a common connector: ― Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. ― Repair or replace the malfunctioning location. If there is no common connector: ― Repair or replace the wiring harness which has an open circuit. Go to Step 8.
7	INSPECT EGR VALVE POSITION SENSOR • Reconnect all the disconnected connectors. • Inspect the EGR valve position sensor. (See EGR VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is the EGR valve position sensor normal?	Yes	Go to the next step.
7		No	Replace the EGR valve, then go to the next step. (See EGR VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)].) • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)].) • Has DTC P0406:00 been recorded?	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].)
8		No	Go to the next step.
9	VERIFY OTHER DTCs • 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)].)
9		No	DTC troubleshooting completed.