NO.2 CHECK ENGINE LIGHT ILLUMINATES [SKYACTIV-D 2.2]

id0103g1897100

2

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)

•  Short or open circuit in wiring harness between the following terminals:

―  Instrument cluster terminal B—Front body control module (FBCM) terminal 2K

―  Instrument cluster terminal D—Front body control module (FBCM) terminal 2I

―  Front body control module (FBCM) terminal 2P—PCM terminal 2AK

―  Front body control module (FBCM) terminal 2N—PCM terminal 2AL

•  Instrument cluster malfunction

2	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) • Short or open circuit in wiring harness between the following terminals: ― Instrument cluster terminal B—Front body control module (FBCM) terminal 2K ― Instrument cluster terminal D—Front body control module (FBCM) terminal 2I ― Front body control module (FBCM) terminal 2P—PCM terminal 2AK ― Front body control module (FBCM) terminal 2N—PCM terminal 2AL • Instrument cluster malfunction

Diagnostic Procedure

STEP

INSPECTION

RESULTS

ACTION

1

VERIFY PCM DTC

•  Retrieve PCM DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 2.2].)

No

ATX:

•  Go to the next step.

MTX:

•  Go to Step 3.

2

VERIFY TCM DTC

•  Retrieve TCM DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [GW6A-EL].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [GW6A-EL].)

No

Go to the next step.

3

INSPECT COMMUNICATION LINE BETWEEN PCM AND INSTRUMENT CLUSTER

•  Inspect for short or open circuit between the following terminals:

―  Instrument cluster terminal B—Front body control module (FBCM) terminal 2K

―  Instrument cluster terminal D—Front body control module (FBCM) terminal 2I

―  Front body control module (FBCM) terminal 2P—PCM terminal 2AK

―  Front body control module (FBCM) terminal 2N—PCM terminal 2AL

•  Is the wiring harness normal?

Yes

Inspect the instrument cluster.

(See INSTRUMENT CLUSTER INSPECTION.)

•  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 wiring harness, then go to the next step.

4

Verify the test results.

•  If normal, return to the diagnostic index to service any additional symptoms.
(See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 2.2].)

•  If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.

―  If the vehicle is repaired, troubleshooting is completed.

―  If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY PCM DTC • Retrieve PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 2.2].)
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 ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [GW6A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [GW6A-EL].)
2		No	Go to the next step.
3	INSPECT COMMUNICATION LINE BETWEEN PCM AND INSTRUMENT CLUSTER • Inspect for short or open circuit between the following terminals: ― Instrument cluster terminal B—Front body control module (FBCM) terminal 2K ― Instrument cluster terminal D—Front body control module (FBCM) terminal 2I ― Front body control module (FBCM) terminal 2P—PCM terminal 2AK ― Front body control module (FBCM) terminal 2N—PCM terminal 2AL • Is the wiring harness normal?	Yes	Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) • 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 wiring harness, then go to the next step.
4	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 2.2].) • If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)