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Home >> Mazda >> 2015 >> 3 SV, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Automatic Transaxle On-Board Diagnostic) >> DTC P1784: 00 Hi Cut Valve Stuck Off/R-3-5 Cut Valve Stuck On >> Diagnostic Procedure

Diagnostic Procedure

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DTC P1784:00 (FW6A-EL) - DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 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.
No Go to the next step.
2 INSPECT ATF LEVEL 
Yes Adjust the ATF level to the specification, then go to the next step.
(See AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT [FW6A-EL] .)
No Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .)
3 PERFORM STALL TEST TO VERIFY DTCs 
Yes Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .)
No Go to the next step.
4 PERFORM ON-BOARD DIAGNOSTIC TEST 
Yes Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [FW6A-EL] .)
No Drive the vehicle for 10 min or more. 
DTCs are displayed:

No DTCs are displayed:
  • DTC troubleshooting completed.