NO.2 CHECK ENGINE LIGHT ILLUMINATES [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)]

id0103q5205000

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)
•  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 2S
―  Front body control module (FBCM) terminal 2N—PCM terminal 2T
•  Instrument cluster malfunction

Diagnostic Procedure

STEP

INSPECTION

RESULTS

ACTION
1
VERIFY PCM DTC
•  Retrieve any DTCs using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
No
Go to the next step.
2
INSPECT COMMUNICATION LINE BETWEEN PCM AND INSTRUMENT CLUSTER
•  Inspect for a 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 2S
―  Front body control module (FBCM) terminal 2N—PCM terminal 2T
•  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.
No
Refer to the wiring diagram and verify whether or not there is a common connector 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 2S
•  Front body control module (FBCM) terminal 2N—PCM terminal 2T
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.
Go to the next step.
3
Verify the test results.
•  If normal, return to the diagnostic index to service any additional symptoms.
•  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.