Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

NO CYLINDER DEACTIVATION (SKYACTIV-G) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY IF CHARACTERISTIC LEARNING IS COMPLETED Verify if cylinder deactivation control has not been implemented directly after the following servicing. Directly after battery removal Directly after PCM configuration Does the non-implementation of the cylinder deactivation control apply to the above conditions?	Yes	Explain to the customer that cylinder deactivation control has not been implemented because the characteristic learning is not completed. Go to repair completion verification.
1		No	Go to the next step.
2	VERIFY HOW CUSTOMER DRIVES VEHICLE Verify if cylinder deactivation control has not been implemented under the following situations. Driving condition Vehicle speed: 5 km/h {3 mph} or less Engine torque is large Accelerator pedal depression amount is large Accelerator pedal operation is too aggressive Large amount of vehicle load Insufficient engine warm-up Right after engine start Engine coolant or engine oil temperature is high Continuous, high-load driving DSC operation During or directly after DSC operation Cylinder deactivation continues for long periods Cylinder deactivation condition continues for 5 min or more NOTE: Cylinder deactivation control does not operate for approx. 30 s after cylinder deactivation control is continued for 5 min or more. Is there an applicable item for the situation in which cylinder deactivation control is not implemented?	Yes	Explain to the customer that the vehicle is normal and advise the customer how to drive the vehicle appropriately. Go to repair completion verification.
2		No	Go to the next step.
3	VERIFY PCM DTC Perform the DTC inspection for the PCM. (See DTC INSPECTION .) Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G (US))] .)
3		No	Go to the next step.
4	DETERMINE IF MALFUNCTION CAUSED BY BATTERY BY VERIFYING BATTERY VOLTAGE Access the VPWR PID using the MMDS. (See PID/DATA MONITOR INSPECTION .) Verify the VPWR PID value. Is the VPWR PID value 11.5 V or less?	Yes	Go to the next step.
4		No	Go to Step 6.
5	INSPECT BATTERY FOR MALFUNCTION Inspect the applicable part. (See BATTERY INSPECTION [(US)] .) Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See BATTERY RECHARGING [(US)] .) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (VIN M (US))] .)
6	VERIFY REPEATABILITY OF MALFUNCTION SYMPTOM Drive the vehicle 3 times under the following conditions. Deceleration continues for approx. 6 s with accelerator pedal and brake pedal released while driving at a speed of approx. 60 km/h {37 mph} or more. Can implementation of cylinder deactivation control be verified? (Verify using center display)	Yes	Go to the next step.
6		No	Replace the PCM and perform the repair completion verification. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (VIN M (US))] .)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(US)] .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING Verify repair information and verify that there is a new calibration in the PCM. Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (VIN M (US))] .)
Repair completion verification 2		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (VIN M (US))] .)