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.

TRANSAXLE OVERHEATS (ET6A-EL, ET6AX-EL, US) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	INSPECT SIGNAL PARTS FOR MALFUNCTION Inspect the value at the following PCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION .) APP1 (APP sensor No. 1) APP2 (APP sensor No. 2) ECT (ECT sensor) ENG_RPM (CKP sensor) Is there any malfunction? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (US))] .)	Yes	Repair or replace any malfunctioning parts according to the inspection result.
1		No	Go to the next step.
2	INSPECT SIGNAL PARTS FOR MALFUNCTION Inspect the value at the following electrical supply unit (ESU) PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION .) BRK_SW (Brake switch) Is there any malfunction? (See PID/DATA MONITOR TABLE [ELECTRICAL SUPPLY UNIT (ESU) (US)] .)	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Go to the next step.
3	INSPECT ATF LEVEL Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION (US) .) Is there any malfunction?	Yes	Adjust the ATF level to the specification. (See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT (US) .)
3		No	Go to the next step.
4	VISUALLY INSPECT OIL COOLER Visually inspect the oil cooler. Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result. (See OIL COOLER REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
4		No	Go to the next step.
5	VERIFY IF MALFUNCTION CAUSE IS CONTROL VALVE BODY Inspect the value at the following TCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION .) ECU_TEMP_A ECU_TEMP_B ECU_TEMP_C GEAR_SEL LINE_PRES_COMD CLTCH_OIL_PRES_SW1 CLTCH_OIL_PRES_SW2 CLTCH_OIL_PRES_SW3 CLTCH_OIL_PRES_SW4 OSS SHIFT_SOL_B_CUR_ACT SHIFT_SOL_C_CUR_ACT SHIFT_SOL_D_CUR_ACT SHIFT_SOL_E_CUR_ACT TRQ_CON_CLTCH_CUR_ACT TRQ_CON_CLTCH_PRES SHIFT_SOL_A_CUR SHIFT_SOL_A_PRES SFTR_DOWN SFTR_UP SHIFT_R SHIFT_N SHIFT_D SHIFT_A_M SHIFT_P TSS VSS Is there any malfunction? (See PID/DATA MONITOR TABLE [TCM (ET6A-EL, ET6AX-EL) (US)] .)	Yes	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION (US) .)
5		No	Symptom troubleshooting is completed.