OPERATION 3. After performing the warm-up operation, check that the gauges and caution lamps are normal. If any defect exists, repair it. 4. Run the engine under a light load until the engine water temperature gauge (2) and the torque converter oil gauge (3) are in the green range. 5. Check that the exhaust color, sound, or vibration is normal. If any problems exist, repair them. WA450-3MC 2-53