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DTC Detection Logic

DTC DETECTION LOGIC

DTC Item (CONSULT-III screen terms) A/T CHECK indicator lamp judgment flicker Diagnostic item is detected when... Possible cause
P0731 A/T 1ST GR FNCTN 18th TCM detects any inconsistency in the actual gear ratio.
  • Input clutch solenoid valve
  • Front brake solenoid valve
  • Direct clutch solenoid valve
  • High and low reverse clutch solenoid valve
  • Each clutch and brake
  • Hydraulic control circuit
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