CHECK ENGINE LIGHT ILLUMINATES [SKYACTIV-D]

id0103s5888900

Troubleshooting item

CHECK ENGINE LIGHT ILLUMINATES

Description

•  Check engine light illuminates incorrectly.

Note

•  If there is a malfunction in the engine system, the PCM stores a DTC and illuminates the check engine light.

Possible cause

•  Emission system malfunction (DTC is stored in PCM)

•  ATX related malfunction (DTC is stored in TCM) (ATX)

•  CAN communication line malfunction between Instrument cluster and PCM

•  Instrument cluster malfunction

Diagnostic Procedure

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

ATX:

•  Go to the next step.

MTX:

•  Go to Step 3.

2

VERIFY TCM DTC

•  Retrieve TCM DTCs using the M-MDS.
(See DTC INSPECTION.)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].)

No

Go to the next step.

3

INSPECT COMMUNICATION LINE BETWEEN PCM AND INSTRUMENT CLUSTER

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Inspect the instrument cluster.

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

•  If there is any malfunction:

―  Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

No

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

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].)

Troubleshooting item	CHECK ENGINE LIGHT ILLUMINATES
Description	• Check engine light illuminates incorrectly. Note • If there is a malfunction in the engine system, the PCM stores a DTC and illuminates the check engine light.
Possible cause	• Emission system malfunction (DTC is stored in PCM) • ATX related malfunction (DTC is stored in TCM) (ATX) • CAN communication line malfunction between Instrument cluster and PCM • Instrument cluster malfunction

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)].)
1		No	ATX: • Go to the next step. MTX: • Go to Step 3.
2	VERIFY TCM DTC • Retrieve TCM DTCs using the M-MDS. (See DTC INSPECTION.) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].)
2		No	Go to the next step.
3	INSPECT COMMUNICATION LINE BETWEEN PCM AND INSTRUMENT CLUSTER • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION [(E)].) • If there is any malfunction: ― Repair or replace the malfunctioning part according to the inspection results, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
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)
Repair completion verification 1		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].)
Repair completion verification 2		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)