DIESEL PARTICULATE FILTER INDICATOR LIGHT ILLUMINATED FREQUENTLY/MESSAGE RELATED TO ACCUMULATION CONDITION IN DIESEL PARTICULATE FILTER INDICATED IN DISPLAY [SKYACTIV-D]

Troubleshooting item	DIESEL PARTICULATE FILTER INDICATOR LIGHT ILLUMINATED FREQUENTLY/MESSAGE RELATED TO ACCUMULATION CONDITION IN DIESEL PARTICULATE FILTER INDICATED IN DISPLAY
Description	• Diesel particulate filter indicator light illuminated frequently. • Message related to accumulation condition in diesel particulate filter indicated in display.
Possible cause	• PCM DTC is stored. • Exhaust gas pressure sensor No.2 malfunction • Diesel particulate filter clogged • Engine coolant temperature is low (overcooling) • Instrument cluster malfunction • Poor engine oil quality • Poor fuel quality • Abnormal engine combustion Warning • The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: ― Always keep sparks and flames away from fuel. Fuel can be easily ignited which could cause serious injury or death, and damage to equipment. ― Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death, and damage to property and facilities. Fuel can also irritate skin and eyes. To prevent this, always complete the “Fuel Line Safety Procedure”, while referring to the “BEFORE SERVICE PRECAUTION”. (See BEFORE SERVICE PRECAUTION [SKYACTIV-D 1.8].) ― Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. When installing the fuel hose, always refer to the “AFTER SERVICE PRECAUTION” and perform the “Fuel Hose Installation Procedure”. (See AFTER SERVICE PRECAUTION [SKYACTIV-D 1.8].)
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

Troubleshooting item

DIESEL PARTICULATE FILTER INDICATOR LIGHT ILLUMINATED FREQUENTLY/MESSAGE RELATED TO ACCUMULATION CONDITION IN DIESEL PARTICULATE FILTER INDICATED IN DISPLAY

Description

• Diesel particulate filter indicator light illuminated frequently.

• Message related to accumulation condition in diesel particulate filter indicated in display.

Possible cause

• PCM DTC is stored.

• Exhaust gas pressure sensor No.2 malfunction

• Diesel particulate filter clogged

• Engine coolant temperature is low (overcooling)

• Instrument cluster malfunction

• Poor engine oil quality

• Poor fuel quality

• Abnormal engine combustion

Warning

• The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:

― Always keep sparks and flames away from fuel. Fuel can be easily ignited which could cause serious injury or death, and damage to equipment.

― Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death, and damage to property and facilities. Fuel can also irritate skin and eyes. To prevent this, always complete the “Fuel Line Safety Procedure”, while referring to the “BEFORE SERVICE PRECAUTION”. (See BEFORE SERVICE PRECAUTION [SKYACTIV-D 1.8].)

― Fuel is highly flammable and dangerous. Fuel line spills and leakage can cause serious injury or death, and damage to equipment. When installing the fuel hose, always refer to the “AFTER SERVICE PRECAUTION” and perform the “Fuel Hose Installation Procedure”. (See AFTER SERVICE PRECAUTION [SKYACTIV-D 1.8].)

System wiring diagram

• Not applicable

Connector diagram

• Not applicable

Step	Inspection	Results	Action
1	VERIFY PCM DTC • Retrieve PCM DTCs using the M-MDS. (See DTC INSPECTION.) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-D)].)
No	Go to the next step.
2	DETERMINE IF MALFUNCTION IS DUE TO OVERCOOLING • Verify the symptom. • Is the cooling system normal?	Yes	Go to the next step.
No	Perform the symptom troubleshooting “COOLING SYSTEM CONCERNS-RUNS COLD”. (See COOLING SYSTEM CONCERNS-RUNS COLD [SKYACTIV-D].)
3	VERIFY PM ACCUMULATION AMOUNT IN DIESEL PARTICULATE FILTER • Access the following PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION.) PCM ― PM_ACCM_DSD ― PM_GEN • Start the engine and race it at 3,000 rpm until the PM_ACCM_DSD monitored value stabilizes. • Is the PM_ACCM_DSD monitored value twice that of the PM_GEN monitored value or more?	Yes	Go to the next step.
No	Go to Step 5.
4	INSPECT EXHAUST GAS PRESSURE SENSOR NO.2 FOR MALFUNCTION • Inspect the applicable part. (See EXHAUST GAS PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8].) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
5	INSPECT DIESEL PARTICULATE FILTER FOR CLOGGING • Perform the “COMPULSORY DIESEL PARTICULATE FILTER REGENERATION”. (See COMPULSORY DIESEL PARTICULATE FILTER REGENERATION [SKYACTIV-D 1.8].) • Access the PM_ACCM_DSD PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) • Is the PM_ACCM_DSD PID value approx. 0?	Yes	Go to Step 7.
No	Go to the next step.
6	INSPECT DIESEL PARTICULATE FILTER • Verify all accessory loads are off. • Access the following PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION.) PCM ― PM_ACCM_DSD ― PM_GEN • Start the engine and race it for several minutes. • Is the increase in the PM_ACCM_DSD and the PM_GEN monitored values the same?	Yes	Go to the next step.
No	Replace the catalytic converter, then go to repair completion verification. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
7	INSPECT INSTRUMENT CLUSTER FOR MALFUNCTION • Inspect the applicable part. (See INSTRUMENT CLUSTER INSPECTION [(E)].) • Is the part normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
8	INSPECT FOR MALFUNCTION DUE TO POOR ENGINE OIL • Replace the engine oil. (See ENGINE OIL REPLACEMENT [SKYACTIV-D 1.8].) • Does the symptom disappear?	Yes	Advise the customer to have the engine oil replaced periodically. Perform the “ENGINE OIL DATA RESET”. (See ENGINE OIL DATA RESET [SKYACTIV-D 1.8].)
No	Perform the “ENGINE OIL DATA RESET”, then go to the next step. (See ENGINE OIL DATA RESET [SKYACTIV-D 1.8].)
9	INSPECT FOR MALFUNCTION DUE TO POOR FUEL • Replace the fuel. (See FUEL DRAINING PROCEDURE [SKYACTIV-D 1.8].) • Does the symptom disappear?	Yes	Advise the customer as to the change in the fuel used.
No	Remove the accumulated matter in the cylinder head using the following procedure, then go to the next step. • Carbon remover • Overhauling
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) • If the CAN communication is normal, perform the diagnosis from Step 1. ― If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING • Verify repair information and verify that there is a new calibration in the PCM. • Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

Step

Inspection

Results

Action

VERIFY PCM DTC

• Retrieve PCM DTCs using the M-MDS.

(See DTC INSPECTION.)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-D)].)

Go to the next step.

DETERMINE IF MALFUNCTION IS DUE TO OVERCOOLING

• Verify the symptom.

• Is the cooling system normal?

Yes

Go to the next step.

Perform the symptom troubleshooting “COOLING SYSTEM CONCERNS-RUNS COLD”.

(See COOLING SYSTEM CONCERNS-RUNS COLD [SKYACTIV-D].)

VERIFY PM ACCUMULATION AMOUNT IN DIESEL PARTICULATE FILTER

• Access the following PIDs using the M-MDS.

(See PID/DATA MONITOR INSPECTION.)

PCM

― PM_ACCM_DSD

― PM_GEN

• Start the engine and race it at 3,000 rpm until the PM_ACCM_DSD monitored value stabilizes.

• Is the PM_ACCM_DSD monitored value twice that of the PM_GEN monitored value or more?

Yes

Go to the next step.

Go to Step 5.

INSPECT EXHAUST GAS PRESSURE SENSOR NO.2 FOR MALFUNCTION

• Inspect the applicable part.

(See EXHAUST GAS PRESSURE SENSOR INSPECTION [SKYACTIV-D 1.8].)

• Is the part normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

(See EXHAUST GAS PRESSURE SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

INSPECT DIESEL PARTICULATE FILTER FOR CLOGGING

• Perform the “COMPULSORY DIESEL PARTICULATE FILTER REGENERATION”.

(See COMPULSORY DIESEL PARTICULATE FILTER REGENERATION [SKYACTIV-D 1.8].)

• Access the PM_ACCM_DSD PID using the M-MDS.

(See PID/DATA MONITOR INSPECTION.)

• Is the PM_ACCM_DSD PID value approx. 0?

Yes

Go to Step 7.

Go to the next step.

INSPECT DIESEL PARTICULATE FILTER

• Verify all accessory loads are off.

• Access the following PIDs using the M-MDS.

(See PID/DATA MONITOR INSPECTION.)

PCM

― PM_ACCM_DSD

― PM_GEN

• Start the engine and race it for several minutes.

• Is the increase in the PM_ACCM_DSD and the PM_GEN monitored values the same?

Yes

Go to the next step.

Replace the catalytic converter, then go to repair completion verification.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

INSPECT INSTRUMENT CLUSTER FOR MALFUNCTION

• Inspect the applicable part.

(See INSTRUMENT CLUSTER INSPECTION [(E)].)

• Is the part normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

INSPECT FOR MALFUNCTION DUE TO POOR ENGINE OIL

• Replace the engine oil.

(See ENGINE OIL REPLACEMENT [SKYACTIV-D 1.8].)

• Does the symptom disappear?

Yes

Advise the customer to have the engine oil replaced periodically.

Perform the “ENGINE OIL DATA RESET”.

(See ENGINE OIL DATA RESET [SKYACTIV-D 1.8].)

Perform the “ENGINE OIL DATA RESET”, then go to the next step.

(See ENGINE OIL DATA RESET [SKYACTIV-D 1.8].)

INSPECT FOR MALFUNCTION DUE TO POOR FUEL

• Replace the fuel.

(See FUEL DRAINING PROCEDURE [SKYACTIV-D 1.8].)

• Does the symptom disappear?

Yes

Advise the customer as to the change in the fuel used.

Remove the accumulated matter in the cylinder head using the following procedure, then go to the next step.

• Carbon remover

• Overhauling

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

• Install/connect the part removed/disconnected during the troubleshooting procedure.

• Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

• If the CAN communication is normal, perform the diagnosis from Step 1.

― If the malfunction recurs, go to the next step.

Repair completion verification 2

VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING

• Verify repair information and verify that there is a new calibration in the PCM.

• Is there a new calibration in the PCM?

Yes

Perform the PCM reprogramming and verify if the malfunction symptom was corrected.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)

Replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)