DTC P20EA:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

id0102k1723900

DTC P20EA:00

SCR relay No.1 malfunction

DETECTION CONDITION

•  With the following conditions met, the dosing control unit detects that there is no SCR relay No.1 open signal 3 times or more.

MONITORING CONDITIONS

•  Ignition switched ON (engine on)

•  Battery voltage: 10.9—16 V

Note

•  DTC P1640:00 is also stored in the PCM.

Diagnostic support note

•  This is a continuous monitor (CCM).

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

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the dosing control unit memory.

FAIL-SAFE FUNCTION

•   Not applicable

POSSIBLE CAUSE

•  SCR relay No.1 malfunction

•  Dosing control unit connector or terminals malfunction

•  Short to ground or open circuit in SCR relay No.1 power supply circuit

―  Short to ground in wiring harness between MAIN 200 A fuse and SCR relay No.1 terminal A

―  MAIN 200 A fuse and/or SCR1 20 A fuse malfunction

―  Open circuit in wiring harness between battery positive terminal and SCR relay No.1 terminal A

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

―  SCR relay No.1 terminal E—dosing control unit terminal BV

―  SCR relay No.1 terminal C—dosing control unit terminal B

―  SCR relay No.1 terminal C—dosing control unit terminal C

•  Open circuit in wiring harness between the following terminals:

―  SCR relay No.1 terminal E—dosing control unit terminal BV

―  SCR relay No.1 terminal C—dosing control unit terminal B

―  SCR relay No.1 terminal C—dosing control unit terminal C

•  Dosing control unit malfunction

DTC P20EA:00	SCR relay No.1 malfunction
DETECTION CONDITION	• With the following conditions met, the dosing control unit detects that there is no SCR relay No.1 open signal 3 times or more. MONITORING CONDITIONS • Ignition switched ON (engine on) • Battery voltage: 10.9—16 V Note • DTC P1640:00 is also stored in the PCM. Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the dosing control unit detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the dosing control unit memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• SCR relay No.1 malfunction • Dosing control unit connector or terminals malfunction • Short to ground or open circuit in SCR relay No.1 power supply circuit ― Short to ground in wiring harness between MAIN 200 A fuse and SCR relay No.1 terminal A ― MAIN 200 A fuse and/or SCR1 20 A fuse malfunction ― Open circuit in wiring harness between battery positive terminal and SCR relay No.1 terminal A • Short to ground in wiring harness between the following terminals: ― SCR relay No.1 terminal E—dosing control unit terminal BV ― SCR relay No.1 terminal C—dosing control unit terminal B ― SCR relay No.1 terminal C—dosing control unit terminal C • Open circuit in wiring harness between the following terminals: ― SCR relay No.1 terminal E—dosing control unit terminal BV ― SCR relay No.1 terminal C—dosing control unit terminal B ― SCR relay No.1 terminal C—dosing control unit terminal C • Dosing control unit malfunction

Diagnostic Procedure

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY FREEZE FRAME DATA/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA/snapshot data on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR 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	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition off, then ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Is the PENDING CODE/ DTC present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) Perform applicable DTC troubleshooting, and then perform compulsory diesel particulate filter regeneration.
3		No	Go to the next step.
4	INSPECT SCR RELAY NO.1 • Switch the ignition off. • Remove the SCR relay No.1. • Inspect the SCR relay No.1. (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the SCR relay No.1, then go to Step 10.
4		No	Go to the next step.
5	INSPECT DOSING CONTROL UNIT CONNECTOR CONDITION • Disconnect the dosing control unit 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 10.
5		No	Go to the next step.
6	INSPECT SCR RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • SCR relay No.1 is removed. • Measure the voltage at the SCR relay No.1 terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
6		No	Inspect the MAIN 200 A fuse and SCR1 20 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and SCR relay No.1 terminal A. • Repair or replace the malfunctioning part. 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. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If all fuses are normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and SCR relay No.1 terminal D. 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 10.
7	INSPECT SCR1 20 A FUSE • Remove the SCR1 20 A fuse. • Inspect the SCR1 20 A fuse. • Is there any malfunction?	Yes	If the fuse is blown: • Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: ― SCR relay No.1 terminal E—dosing control unit terminal BV ― SCR relay No.1 terminal C—dosing control unit terminal B ― SCR relay No.1 terminal C—dosing control unit terminal C 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. • Replace the fuse. If the fuse is damaged: • Replace the fuse. Go to Step 10.
7		No	Reinstall the SCR1 20 A fuse, then go to the next step.
8	INSPECT SCR RELAY NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Disconnect the dosing control unit connector. • Verify that the SCR relay No.1 is removed. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― SCR relay No.1 terminal E ― SCR relay No.1 terminal C • Is there continuity?	Yes	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: ― SCR relay No.1 terminal E—dosing control unit terminal BV ― SCR relay No.1 terminal C—dosing control unit terminal B ― SCR relay No.1 terminal C—dosing control unit terminal C 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 dosing control unit (short to ground in the dosing control unit internal circuit). (See DOSING CONTROL UNIT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 10.
8		No	Go to the next step.
9	INSPECT SCR RELAY NO.1 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Verify that the dosing control unit connector is disconnected. • Verify that the SCR relay No.1 is removed. • Inspect for continuity between the following terminals (wiring harness-side): ― SCR relay No.1 terminal E—dosing control unit terminal BV ― SCR relay No.1 terminal C—dosing control unit terminal B ― SCR relay No.1 terminal C—dosing control unit terminal C • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • SCR relay No.1 terminal E—dosing control unit terminal BV • SCR relay No.1 terminal C—dosing control unit terminal B • SCR relay No.1 terminal C—dosing control unit terminal C 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 open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a open circuit. Go to Step 10.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the dosing control unit memory using the M-MDS. (See CLEARING DTC [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Leave for 1 min while idling. • Display the DTCs using the M-MDS. (See CLEARING DTC [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Retrieve the dosing control unit DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the dosing control unit. (See DOSING CONTROL UNIT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
10		No	Go to the next step.
11	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
11		No	DTC troubleshooting completed.