Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION		ACTION
1	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service 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.
1		No	Go to the next step.
2	VERIFY VEHICLE DRIVING CONDITIONS Verify each PID of "HTM_CNT" and "HTM_DIS". Verify vehicle driving conditions when a DTC P1783:00 is output. Has the vehicle been driven at a high engine load?	Yes	Go to Step 5. Inform the customer that the transaxle temperature is high due to high engine load driving.
2		No	Go to the next step.
3	INSPECT ATF CONDITION Inspect the ATF condition. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL] .) Is it normal?	Yes	Go to the next step.
3		No	Replace the ATF, then go to Step 5. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL] .)
4	INSPECT ATF LEVEL Inspect the ATF level. (See AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION [FS5A-EL] .) Is it normal?	Yes	Go to the next step.
4		No	Add ATF to the specified level, then go to Step 5. (See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FS5A-EL] .)
5	VERIFY TROUBLESHOOTING OF DTC P1783:00 COMPLETED Make sure to reconnect all the disconnected connectors. Clear the DTC using the M-MDS. Perform the following procedure to ensure that the DTC has been resolved: Start the engine. Idle the engine for 1 s or more. Is the same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [FS5A-EL] .)
5		No	Go to the next step.
6	VERIFY NO DTC HAS BEEN PRESENTED Perform the "Reading DTCs Procedure". (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FS5A-EL] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL] .)
6		No	DTC troubleshooting completed.