Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY IF CLATTERING SOUND IS HEARD Is clattering sound heard?	Yes	Inspect and perform the following: Malfunction in powertrain system control Piston clearance Oil flushing or oil replacement (See ENGINE OIL REPLACEMENT .) If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
1		No	Go to the next step.
2	VERIFY IF JINGLING SOUND IS HEARD Is jingling sound heard?	Yes	Inspect the following: Inspect engine oil pressure (foreign matter penetration in oil passage, strainer, filter) (See OIL PRESSURE INSPECTION .) Inspect chain sprocket, tensioner, and spring If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
2	VERIFY IF JINGLING SOUND IS HEARD Is jingling sound heard?	No	Go to the next step.
3	VERIFY IF GEE-GEE SOUND IS HEARD Is gee-gee sound heard?	Yes	Inspect the following: Verify electric variable valve timing system operation If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
3	VERIFY IF GEE-GEE SOUND IS HEARD Is gee-gee sound heard?	No	Go to the next step.
4	VERIFY IF METAL TO METAL RUBBING SOUND IS HEARD Is metal to metal rubbing sound heard?	Yes	Inspect and perform the following: Inspect engine oil pressure (See OIL PRESSURE INSPECTION .) Oil flushing or oil replacement (See ENGINE OIL REPLACEMENT .) Verify fuel injector operation current Verify fuel injector, intake manifold, and plug hole plate If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
4		No	Go to the next step.
5	VERIFY IF SOUND SIMILAR TO CRICKETS IS HEARD Is a cricket sound heard?	Yes	Inspect the following: Verify control Verify pipe installation, twisting If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
5		No	Go to the next step.
6	VERIFY IF SQUEAKING SOUND IS HEARD Is squeaking sound heard?	Yes	Inspect the following: Inspect drive belt tension Inspect drive belt deterioration Inspect for sand caught in drive belt Verify pulley tensioner If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
6		No	Go to the next step.
7	VERIFY IF SQUEALING SOUND IS HEARD Is squealing sound heard?	Yes	Inspect the following: Verify if generator output control is normal Verify if sound occurs in a certain gear or at a certain vehicle speed If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
7		No	Go to the next step.
8	VERIFY IF RATTLING SOUND IS HEARD Is rattling sound heard?	Yes	Perform the following: Replace drive belt auto tensioner. (See DRIVE BELT AUTO TENSIONER REMOVAL/INSTALLATION .) If the malfunction recurs, replace the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION .)
8	VERIFY IF RATTLING SOUND IS HEARD Is rattling sound heard?	No	Go to the next step.
9	VERIFY IF HISSING SOUND IS HEARD Is hissing sound heard?	Yes	Inspect the following: Inspect intake system pipe for air leakage Inspect air conditioner refrigerant pressure If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
9	VERIFY IF HISSING SOUND IS HEARD Is hissing sound heard?	No	Go to the next step.
10	VERIFY THAT A KNOCKING OR PUT-PUT SOUND IS HEARD Is a knocking or put-put sound heard?	Yes	Inspect the following: Verify purge solenoid valve control If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
10		No	Go to the next step.
11	VERIFY IS CLICK-CLACK SOUND IS HEARD Is click-clack sound heard?	Yes	Inspect the following: If there is excessive abnormal sound, inspect A/C compressor magnetic clutch Inspect for loosened or twisted A/C compressor magnetic clutch, solenoid valve If there is any malfunction: Repair or replace the malfunctioning part according to the inspection results. If there is no malfunction: Go to the next step.
11		No	Go to the next step.
12	Verify the test results. If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX .) 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.