NO.27 NO CYLINDER DEACTIVATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)]
id0103q5903300
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Troubleshooting item |
No cylinder deactivation |
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Description
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• Cylinder deactivation control does not operate.
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Possible cause
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• Cylinder deactivation control is in inhibit mode due to any of the following conditions
Due to customer's driving operation or vehicle conditions
Other
*1: To perform cylinder deactivation control, the PCM performs the crankshaft installation tolerance learning and learns the individual differences (variations) of the sensor which occurs during the manufacturing of the engine oil pressure sensor relative to the cylinder deactivation control-related parts.
Crankshaft installation tolerance learning
• While deceleration continues for approx. 6 s with accelerator pedal released and brake pedal released while driving at a speed of approx. 60 km/h {37 mph} or more
Engine oil pressure sensor variation learning
• During 11 s while vehicle is stopped after ignition switched OFF
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System wiring diagram
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• Not applicable
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Connector diagram
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• Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY IF CHARACTERISTIC LEARNING IS COMPLETED
• Verify if cylinder deactivation control has not been implemented directly after the following servicing.
• Does the non-implementation of the cylinder deactivation control apply to the above conditions?
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Yes
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Explain to the customer that cylinder deactivation control has not been implemented because the characteristic learning is not completed.
Go to Step 7.
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No
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Go to the next step.
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2
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VERIFY HOW CUSTOMER DRIVES VEHICLE
• Verify if cylinder deactivation control has not been implemented under the following situations.
Driving condition
Engine torque is large
Insufficient engine warm-up
Engine coolant or engine oil temperature is high
DSC operation
Cylinder deactivation continues for long periods
• Is there an applicable item for the situation in which cylinder deactivation control is not implemented?
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Yes
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Explain to the customer that the vehicle is normal and advise the customer how to drive the vehicle appropriately.
Go to Step 7.
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No
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Go to the next step.
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3
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VERIFY PCM DTC
• Perform the DTC inspection for the PCM.
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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4
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DETERMINE IF MALFUNCTION CAUSED BY BATTERY BY VERIFYING BATTERY VOLTAGE
• Access the VPWR PID using the M-MDS.
• Verify the VPWR PID value.
• Is the VPWR PID value 11.5 V or less?
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Yes
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Go to the next step.
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No
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Go to Step 6.
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5
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INSPECT BATTERY FOR MALFUNCTION
• Inspect the applicable part.
(See BATTERY INSPECTION.)
• Is the part normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location.
(See BATTERY RECHARGING.)
Go to Step 7.
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6
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VERIFY REPEATABILITY OF MALFUNCTION SYMPTOM
• Drive the vehicle 3 times under the following conditions.
• Verify that cylinder deactivation control is implemented using the following method.
Type A VIN:
Type B VIN:
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Yes
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Go to the next step.
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No
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Replace the PCM.
Go to the next step.
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7
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Verify the test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
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