DTC U02A3:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

id0102k1946700

DTC U02A3:00

CAN communication system: PM sensor information communication error with dosing control unit

DETECTION CONDITION

•  With the following conditions met, a communication error between the dosing control unit and PM sensor is continued for 5 s or more.

MONITORING CONDITIONS

•  Battery voltage: 10.9—16 V

•  Ignition switched: On

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

•  PM sensor connector or terminals malfunction

•  Dosing control unit connector or terminals malfunction

•  CAN communication line between PM sensor and dosing control unit

―  PM sensor terminal B—dosing control unit terminal BK

―  PM sensor terminal C—dosing control unit terminal BL

•  PM sensor malfunction

•  Dosing control unit malfunction

DTC U02A3:00	CAN communication system: PM sensor information communication error with dosing control unit
DETECTION CONDITION	• With the following conditions met, a communication error between the dosing control unit and PM sensor is continued for 5 s or more. MONITORING CONDITIONS • Battery voltage: 10.9—16 V • Ignition switched: On 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	• PM sensor connector or terminals malfunction • Dosing control unit connector or terminals malfunction • CAN communication line between PM sensor and dosing control unit ― PM sensor terminal B—dosing control unit terminal BK ― PM sensor terminal C—dosing control unit terminal BL • PM sensor malfunction • Dosing control unit malfunction

Diagnostic Procedure

STEP	INSPECTION	RESULTS	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 snapshot data on the repair order.	—	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	INSPECT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the PM sensor 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 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 9.
4		No	Go to the next step.
5	INSPECT PM SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the PM sensor and dosing control unit connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― PM sensor terminal B ― PM sensor terminal C • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • PM sensor terminal B—dosing control unit terminal BK • PM sensor terminal C—dosing control unit terminal BL 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. Go to Step 9.
5		No	Go to the next step.
6	INSPECT PM SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the PM sensor and dosing control unit connectors are disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the dosing control unit detecting an open circuit. • Measure the voltage at the following terminals (wiring harness-side). ― PM sensor terminal B—dosing control unit terminal BK ― PM sensor terminal C—dosing control unit terminal BL • Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • PM sensor terminal B—dosing control unit terminal BK • PM sensor terminal C—dosing control unit terminal BL 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 power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
7	INSPECT PM SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the PM sensor and dosing control unit connectors are disconnected. • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side): ― PM sensor terminal B—dosing control unit terminal BK ― PM sensor terminal C—dosing control unit terminal BL • 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 the following terminals: • PM sensor terminal B—dosing control unit terminal BK • PM sensor terminal C—dosing control unit terminal BL 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 PM SENSOR • Inspect the PM sensor. (See PM SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the PM sensor, then go to the next step. (See PM SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8		No	Go to the next step.
9	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)].) • Start the engine and leave it idling for 10 s. • 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.
9		No	Go to the next step.
10	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)].)
10		No	DTC troubleshooting completed.