7

ENGINE OIL WARNING LIGHT ILLUMINATES/MESSAGE “Engine Oil Pressure Inspection Required” IS INDICATED IN LCD

DESCRIPTION

• Engine oil warning light illuminates.

• Message “Engine Oil Pressure Inspection Required” is indicated in LCD.

POSSIBLE CAUSE

• Improper engine oil level

• Engine oil leakage

• Oil pressure switch connector or terminals malfunction

• PCM connector or terminals malfunction

• Short to ground in wiring harness between oil pressure switch terminal A and PCM terminal 1P

• Open circuit in wiring harness between oil pressure switch terminal A and PCM terminal 1P

• Oil pressure switch malfunction

• Oil pump malfunction

• Instrument cluster malfunction

• PCM malfunction

STEP

INSPECTION

RESULTS

ACTION

1

• Inspect the engine oil level.

  (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-G 2.5].)

• Is there any malfunction?

Yes

Engine oil level is below L:

• Add genuine motor oil, then go to the next step.

Engine oil level is above F:

• Replace the engine oil, then go to the next step. (penetration of fuel into engine oil can be considered)

  (See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.5].)

No

Go to Step 3.

2

• Start the engine.

• Increase and keep the engine speed at 2,500 rpm for 5 s.

• Does the engine oil warning light illuminate?

Yes

Go to the next step.

No

Symptom troubleshooting is completed.

3

• Retrieve the PCM and instrument cluster DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

  (See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

4

• Switch the ignition off.

• Disconnect the oil pressure switch connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals.

No

Go to the next step.

5

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals.

No

Go to the next step.

6

• Verify that the oil pressure switch and PCM connectors are disconnected.

• Inspect for continuity between oil pressure switch terminal A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between oil pressure switch terminal A and PCM terminal 1P.

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.

• Repair or replace the malfunctioning part.

If there is no common connector:

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

No

Go to the next step.

7

• Verify that the oil pressure switch and PCM connectors are disconnected.

• Inspect for continuity between oil pressure switch terminal A (wiring harness-side) and PCM terminal 1P (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between oil pressure switch terminal A and PCM terminal 1P.

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 an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

8

• Inspect the engine oil pressure.

  (See OIL PRESSURE INSPECTION [SKYACTIV-G 2.5].)

• Is there any malfunction?

Yes

Replace the oil pump, then go to the next step.

(See OIL PUMP REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

No

Replace the oil pressure switch, then go to the next step.

(See ENGINE OIL SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

9

Verify the test results.

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

  (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.5].)

• 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.