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Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: If no DTCs are present but driveability problem still exists, proceed to FORD CD4E (MAZDA LA4A-EL) OVERHAUL article for symptom diagnosis procedures.
  1. Perform QUICK TEST  and record all DTCs. If no DTCs are set, go to step  5. If any engine-related DTCs are set, repair them first. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no continuous memory codes were set, go to step  5.
  2. If any DTCs set in previous step were continuous memory codes, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES . Perform TRANSMISSION DRIVE CYCLE TEST . If continuous memory codes are set during drive cycle, go to next step. If continuous memory codes are not set during drive cycle, go to step  5.
  3. Perform SYSTEM test corresponding to DTC set. See READING DIAGNOSTIC TROUBLE CODES . If problem is not corrected, go to next step. If problem is corrected, go to step  6.
  4. Follow SYSTEM tests corresponding to electronic trouble symptom. Perform static and drive tests. Use manufacturer provided transmission tester overlay to perform static tests. If drive tests do not correct problem, go to next step. If drive tests correct problem, check for intermittent DTC. Check transaxle circuit wiring harnesses and connectors for damage or poor connection.
  5. Diagnose problem by mechanical symptom. See SYMPTOM DIAGNOSIS under TROUBLE SHOOTING in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article. Perform any recommended overhaul procedures. Perform TRANSMISSION DRIVE CYCLE TEST .
  6. Check for DTCs. See QUICK TEST . Ensure no DTCs and no mechanical problems exist. If any DTCs exist, go to step  1. If no DTCs exist, clear memory DTC. See CLEARING DIAGNOSTIC TROUBLE CODES .
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