NO.2 CHECK ENGINE LIGHT ILLUMINATES [SKYACTIV-G 2.5T]

id0103q4205000

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 1B—Front body control module (FBCM) terminal 2K ? Instrument cluster terminal 1D—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 • Open circuit in wiring harness between the following terminals: ? Instrument cluster terminal 1B—Front body control module (FBCM) terminal 2K ? Instrument cluster terminal 1D—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 Note • If the check engine light blinks at a steady rate, a misfire condition could possibly exist.

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 1B—Front body control module (FBCM) terminal 2K

? Instrument cluster terminal 1D—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

• Open circuit in wiring harness between the following terminals:

? Instrument cluster terminal 1B—Front body control module (FBCM) terminal 2K

? Instrument cluster terminal 1D—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

Note

• If the check engine light blinks at a steady rate, a misfire condition could possibly exist.

Diagnostic Procedure

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY PCM DTC • Retrieve PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
1		No	Go to the next step.
2	INSPECT INSTRUMENT CLUSTER • Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) • Is there any malfunction?	Yes	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2		No	Inspect for a short or open circuit between the following terminals: • Instrument cluster terminal 1B—Front body control module (FBCM) terminal 2K • Instrument cluster terminal 1D—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 Repair or replace the wiring harness if necessary.
3	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5T].) • 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-G 2.5T].)