DTC Detection Logic

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION LOGIC CHART

DTC	Item (CONSULT-III screen terms)	A/T CHECK indicator lamp judgment flicker	Diagnostic item is detected when...	Possible cause
P0744	A/T TCC S/V FNCTN	3rd	A/T cannot perform lock-up even if electrical circuit is good. TCM detects as irregular by comparing difference value with slip rotation.	Harness or connectors (Sensor circuit is open or shorted.) Torque converter clutch solenoid valve Hydraulic control circuit