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 (EV6A-EL, EV6AX-EL) 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 [EV6A-EL, EV6AX-EL (US)] .) Is there any malfunction?	Yes	Adjust the ATF level to the specification. (See AUTOMATIC TRANSAXLE FLUID (ATF) ADJUSTMENT [EV6A-EL, EV6AX-EL (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 .)
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 (EV6A-EL, EV6AX-EL) (US)] .)	Yes	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (US)] .)
5		No	Symptom troubleshooting is completed.