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Home >> Mazda >> 2014 >> 3 SV, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (On-Board Diagnostic - Automatic Transaxle) >> 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 .)
No Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
3 PERFORM STALL TEST TO VERIFY DTCs 
Yes Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
No Go to the next step.
4 PERFORM ON-BOARD DIAGNOSTIC TEST 
Yes Replace the automatic transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
No Drive the vehicle for 10 min or more. 
DTCs are displayed:

No DTCs are displayed:
  • DTC troubleshooting completed.