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Home >> Kia >> 2001 >> Sephia Base, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - Fa4AEL >> Diagnostic Tests >> DTC P0731: Incorrect 1ST Gear Ratio >> Diagnostic Procedure

Diagnostic Procedure

  1. Inspect ATF level and condition. Correct as needed. If fluid level and condition is okay, check hydraulic pressure. See HYDRAULIC PRESSURE TESTS  under PERFORMANCE TESTS. Follow repair recommendations if hydraulic pressure is not within specifications. If hydraulic pressure is okay, go to next step.
  2. Perform STALL SPEED TEST  under PERFORMANCE TESTS. Follow repair recommendations if stall speed is not within specifications. If stall speed is okay, go to next step.
  3. Perform TIME LAG TEST  under PERFORMANCE TESTS. Follow repair recommendations if time lag is not within specifications. If time lag is okay, go to next step.
  4. Perform ROAD TEST  under PERFORMANCE TESTS. Follow repair recommendations if transaxle shift speeds or shift feel is not as specified. If vehicle shifts at correct speeds and shift feel is acceptable, go to next step.
  5. Clear DTCs. Retrieve DTCs. If DTC P0731 is still present, replace TCM. See TRANSAXLE CONTROL MODULE  under REMOVAL & INSTALLATION. If DTC P0731 is no longer present, problem may be caused by intermittent clutch slippage. Further investigation may be required. See SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING.
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