DTC P0405:00 [SKYACTIV-D 1.5]

id0102q2155400

DTC P0405:00

HP-EGR control valve position sensor circuit low input

DETECTION CONDITION

•  If the input voltage at the PCM terminal 1BF is less than 0.25 V for 2 s, the PCM determines that the HP-EGR control valve position sensor circuit is low.

MONITORING CONDITIONS

―  Battery voltage: 8 V or more

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

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

•  PCM restricts engine torque.

•  Inhibits the auto DPF regeneration control.

•  Inhibits the compulsory DPF regeneration control.

•  Inhibits the EGR control.

•  PCM restricts engine-transaxle integration control. (ATX)

•  Inhibits engine-stop by operating the i-stop function.

POSSIBLE CAUSE

•  HP-EGR control valve connector or terminals malfunction

•  Short to ground in wiring harness between the following terminals:

―  HP-EGR control valve terminal B—PCM terminal 1BE

―  HP-EGR control valve terminal D—PCM terminal 1BF

•  PCM connector or terminals malfunction

•  HP-EGR control valve position sensor signal circuit and ground circuit are shorted to each other

•  Open circuit in wiring harness between HP-EGR control valve terminal B and PCM terminal 1BE

•  HP-EGR control valve position sensor malfunction

•  PCM malfunction

DTC P0405:00	HP-EGR control valve position sensor circuit low input
DETECTION CONDITION	• If the input voltage at the PCM terminal 1BF is less than 0.25 V for 2 s, the PCM determines that the HP-EGR control valve position sensor circuit is low. MONITORING CONDITIONS ― Battery voltage: 8 V or more ― 0.5 s have elapsed after the ignition was switched ON (engine off or on) 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	• PCM restricts engine torque. • Inhibits the auto DPF regeneration control. • Inhibits the compulsory DPF regeneration control. • Inhibits the EGR control. • PCM restricts engine-transaxle integration control. (ATX) • Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE	• HP-EGR control valve connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― HP-EGR control valve terminal B—PCM terminal 1BE ― HP-EGR control valve terminal D—PCM terminal 1BF • PCM connector or terminals malfunction • HP-EGR control valve position sensor signal circuit and ground circuit are shorted to each other • Open circuit in wiring harness between HP-EGR control valve terminal B and PCM terminal 1BE • HP-EGR control valve position sensor malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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/snapshot data on the repair order.	—	Go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT HP-EGR CONTROL VALVE CONNECTOR CONDITION • Switch the ignition off. • Disconnect the HP-EGR control valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
3		No	Go to the next step.
4	INSPECT HP-EGR CONTROL VALVE POSITION SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the HP-EGR control valve connector is disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― HP-EGR control valve terminal B ― HP-EGR control valve terminal D • Is there continuity?	Yes	Disconnect the PCM connector and inspect the wiring harness for short to ground. • If the short to ground circuit could be detected in the wiring harness: ― Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • HP-EGR control valve terminal B—PCM terminal 1BE • HP-EGR control valve terminal D—PCM terminal 1BF If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • If the short to ground circuit could not be detected in the wiring harness: ― Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to Step 9.
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
5		No	Go to the next step.
6	INSPECT HP-EGR CONTROL VALVE POSITION SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER • Verify that the HP-EGR control valve and PCM connectors are disconnected. • Inspect for continuity between HP-EGR control valve terminals D and C (wiring harness-side). • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • HP-EGR control valve terminal D—PCM terminal 1BF • HP-EGR control valve terminal C—PCM terminal 1BG If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to each other. Go to Step 9.
6		No	Go to the next step.
7	INSPECT HP-EGR CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Verify that the HP-EGR control valve and PCM connectors are disconnected. • Inspect for continuity between HP-EGR control valve terminal B (wiring harness-side) and PCM terminal 1BE (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between HP-EGR control valve terminal B and PCM terminal 1BE. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 9.
8	INSPECT HP-EGR CONTROL VALVE POSITION SENSOR • Reconnect all disconnected connectors. • Inspect the HP-EGR control valve position sensor. (See HP-EGR CONTROL VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the HP-EGR control valve, then go to the next step. (See HP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
8		No	Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-D 1.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
10		No	DTC troubleshooting completed.