No Upshift Into Overdrive

Symptom:
* NO UPSHIFT INTO OVERDRIVE

POSSIBLE CAUSES:
ENGINE COOLANT TEMPERATURE TOO LOW
FAILED ENGINE COOLANT TEMPERATURE SENSOR (ECT) - CHECK PCM DTC'S
TCM "OD OFF" CIRCUIT CONNECTED TO BRAKE SWITCH WIRE
OVERDRIVE AND/OR 2-4 CLUTCH OR ACCUMULATOR SEALS INTERMITTENT LEAKAGE
OVERDRIVE OFF SWITCH OPEN OR CIRCUIT SHORTED TO GROUND
DEFECTIVE OVERDRIVE OFF SWITCH