Diagnostic procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY DTC OUTPUT STATUS Is the DTC P1738:00 also present?	Yes	Go to the applicable DTC inspection. (See DTC P1738:00 [TCM (FW6A-EL)] .)
1	VERIFY DTC OUTPUT STATUS Is the DTC P1738:00 also present?	No	Go to the next step.
2	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION NOTE: Recording can be facilitated using the screen capture of the PC function. Record the freeze frame data/snap shot data.	-	Go to the next step.
3	VERIFY RELATED REPAIR INFORMATION AVAILABILITY 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.
3		No	Go to the next step.
4	INSPECT ATF LEVEL Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FW6A-EL] .) Is there any malfunction?	Yes	Adjust the ATF level to the specification, then go to the next step. (See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT [FW6A-EL] .)
4		No	Replace the on/off solenoid, then go to the next step. (See ON/OFF SOLENOID REMOVAL/INSTALLATION [FW6A-EL] .)
5	PERFORM ON-BOARD DIAGNOSTIC TEST Perform the following procedure to ensure that the DTC has been resolved: Start the engine. Verify that the ATF temperature is 55 °C {131 °F} or more. Perform the on-board diagnostic test. (See ON-BOARD DIAGNOSTIC TEST MODE [TCM (FW6A-EL)] .) Are any DTCs present?	Yes	ATF amount in Step 4 is correct Replace the automatic transaxle, then drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .) ATF amount adjusted in Step 4: Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL] .)
5		No	Drive the vehicle to check it, and if there is no problem then the DTC troubleshooting is complete.
6	RE-PERFORM ON-BOARD DIAGNOSTIC TEST Perform the following procedure to ensure that the DTC has been resolved: Start the engine. Verify that the ATF temperature is 55 °C {131 °F} or more. Perform the on-board diagnostic test. (See ON-BOARD DIAGNOSTIC TEST MODE [TCM (FW6A-EL)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (FW6A-EL)] .)
6		No	DTC troubleshooting completed.