DESCRIPTION

Hydraulic variable valve timing control system: over-advanced

DETECTION CONDITION

Determination conditions

• For the advance amount from the maximum exhaust valve retard position, a condition in which the actual advance amount is larger than the target value continues for a specified period of time.

Preconditions

• Engine coolant temperature: 30 °C {86 °F} or more^*1

• Hydraulic variable valve timing control: feedback mode

• The following DTCs are not detected:

• P0335:00, P0365:00

• ^*1: Value can be verified by displaying PIDs using M-MDS

Malfunction determination period

• 5 s period

Drive cycle

• 2

Self test type

• CMDTC self test

Sensor used

• CKP sensor

• Exhaust CMP sensor

FAIL-SAFE FUNCTION

• Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

• Illuminates check engine light.

POSSIBLE CAUSE

• OCV malfunction

• Spool valve in OCV is stuck in advanced position

• Hydraulic variable valve timing actuator malfunction

• Timing chain malfunction

• Poor assembly of timing chain

• Looseness or jumping

• Mis-detection of exhaust CMP sensor

• Engine oil malfunction

• Use of unspecified engine oil

• Low engine oil level

• Low engine oil pressure

• Engine oil runners are clogged or have leakage

• PCM malfunction

Item

Definition

Unit

Condition/Specification

VT_EX_ACT

Actual exhaust variable valve timing control

• Retard amount from max advance position

°(deg)

• Displays actual exhaust variable valve timing—retard amount from max advance position

Ignition switched ON (engine off)

• Approx. 0 ° (ECT is 89 °C {192 °F})

Idle (after warm up)

• Approx. 0.25 ° (ECT is 91 °C {196 °F})

Racing (engine speed is 2,000 rpm)

• Approx. 21.43 ° (ECT is 89 °C {192 °F})

Racing (engine speed is 4,000 rpm)

• Approx. 35.93 ° (ECT is 88 °C {190 °F})

VT_EX_DES

Target exhaust variable valve timing control

• Retard amount from max advance position

°(deg)

• Displays target exhaust variable valve timing—retard amount from max advance position

Ignition switched ON (engine off)

• Approx. 0 ° (ECT is 89 °C {192 °F})

Idle (after warm up)

• Approx. 0 ° (ECT is 91 °C {196 °F})

Racing (engine speed is 2,000 rpm)

• Approx. 22.87 ° (ECT is 89 °C {192 °F})

Racing (engine speed is 4,000 rpm)

• Approx. 36 ° (ECT is 88 °C {190 °F})

Item

Definition

Unit

Operation

VT_EX_DES

OCV control signal

°(deg)

• Changes °(deg) and forcibly drives/stops OCV.

STEP

INSPECTION

RESULTS

ACTION

1

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

2

NOTE:

• Recording can be facilitated using the screen capture function of the PC.

• Record the FREEZE FRAME DATA/snapshot data on the repair order.

—

Go to the next step.

3

• Switch the ignition off, then ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

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

• Is the PENDING CODE/DTC P0335:00, P0365:00, P2090:00 or P2091:00 also present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC P0335:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0365:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2090:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2091:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

4

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

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

• Is the PENDING CODE/DTC P0524:00 also present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC P0524:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

5

• Start the engine and idle it.

• Access the following PIDs using the M-MDS:

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

• VT_EX_ACT

• VT_EX_DES

• Perform the following:

• Race the engine at an engine speed of 3,000 rpm or less.

• Run it at idle.

• Repeat Step 1 and 2 operations above five times in succession.

• Does the monitor value of the PID item VT_EX_ACT conform to the VT_EX_DES PID value?

Yes

Go to Step 7.

No

Go to the next step.

6

• Switch the ignition off.

• Remove the OCV without disconnect the connector.

  (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

• Access the simulation item VT_EX_DES using the M-MDS.

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

• Using the simulation function, force drive the OCV.

• Can the spool valve in OCV operation be verified?

Yes

Go to the troubleshooting procedure to perform the procedure from Step 4.

• If a malfunction occurs, perform diagnosis from Step 1 of the malfunction diagnostic procedure.

No

Replace the OCV.

(See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the troubleshooting procedure to perform the procedure from Step 8.

7

• Start the engine.

• Access the VT_EX_ACT PID using the M-MDS.

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

• Does the PID value fluctuate when the following connectors are shaken?

• OCV

• PCM

Yes

Repair or replace the applicable wiring harness or connector parts.

Go to the troubleshooting procedure to perform the procedure from Step 8.

No

Go to the troubleshooting procedure to perform the procedure from Step 4.

• If a malfunction occurs, perform diagnosis from Step 3 of the malfunction diagnostic procedure.

STEP

INSPECTION

RESULTS

ACTION

1

• Inspect the hydraulic variable valve timing actuator.

  (See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the hydraulic variable valve timing actuator, then go to Step 8.

(See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

2

• Verify the condition of the timing chain assembly (exhaust valve timing, looseness, jumping).

  (See TIMING CHAIN REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part.

Assemble the timing chain using the correct timing, then go to Step 8.

(See TIMING CHAIN REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

3

• Visually inspect for exhaust CMP sensor.

  (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there foreign matter such as metallic dust on the exhaust CMP sensor detection area?

Yes

Remove the foreign matter, then go to Step 8.

No

Go to the next step.

4

• Is the specified engine oil being used?

Yes

Go to the next step.

No

Replace the engine oil with genuine motor oil, then go to Step 8.

(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.0].)

5

• Inspect the engine oil level.

  (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-G 2.0].)

• Is the engine oil level sufficient?

Yes

Go to the next step.

No

Add genuine motor oil, then go to Step 8.

(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.0].)

6

• Inspect the engine oil pressure.

  (See OIL PRESSURE INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Go to the next step.

No

Go to Step 8.

7

• Start the engine.

• Verify if there is engine oil leakage in the oil passage or restriction.

• Is there engine oil leakage in the oil passage or restriction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

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

(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.0].)

No

Go to the next step.

8

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

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

• Implement the repeatability verification procedure.

  (See Repeatability Verification Procedure.)

• Perform the Pending Trouble Code Access Procedure.

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

• Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

9

• Is any other DTC or pending code stored?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.