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

• Check engine light illuminates for emission-related concern (DTC is stored in PCM)

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

• Instrument cluster terminal B—BCM terminal 2D

• Instrument cluster terminal D—BCM terminal 2C

• BCM terminal 3C—PCM terminal 2AK

• BCM terminal 3D—PCM terminal 2AL

• Open circuit in wiring harness between the following terminals:

• Instrument cluster terminal B—BCM terminal 2D

• Instrument cluster terminal D—BCM terminal 2C

• BCM terminal 3C—PCM terminal 2AK

• BCM terminal 3D—PCM terminal 2AL

• Instrument cluster malfunction

STEP

INSPECTION

RESULTS

ACTION

1

• Retrieve any DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

Go to the next step.

2

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

• Instrument cluster terminal B—BCM terminal 2D

• Instrument cluster terminal D—BCM terminal 2C

• BCM terminal 3C—PCM terminal 2AK

• BCM terminal 3D—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

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Instrument cluster terminal B—BCM terminal 2D

• Instrument cluster terminal D—BCM terminal 2C

• BCM terminal 3C—PCM terminal 2AK

• BCM terminal 3D—PCM terminal 2AL

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 or open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground or open circuit.

3

Verify the test results.

• If normal, return to the diagnostic index to service any additional symptoms.

  (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.0].)

• If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.

• If the vehicle is repaired, troubleshooting is completed.

• If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.