1997 Nissan Altima Owner's Manual - Page 135
1997 Nissan Altima Manual
Page 135 highlights
If the cooling system frequently requires coolant, have it checked by your NISSAN dealer. ● Improper servicing can result in reduced heater performance and engine overheating. WARNING ● To avoid the danger of being scalded, never change the coolant when the engine is hot. ● Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pressure fluid escaping from the radiator. 1. Perform the following procedure to open the heater water cock: ● Automatic air conditioner a. Turn ignition switch from OFF to ON. DI1349 CHANGING ENGINE COOLANT ● Major cooling system repairs should be performed by your NISSAN dealer. The service procedures can be found in the appropriate NISSAN Service Manual. 7-5 b. Within 5 seconds after ignition switch is turned ON, press the automatic heater and air conditioner OFF switch for at least 5 seconds. At this time, AUTO, ECON, 88°F and appear in the display. c. Press d. Press (HOT) switch 3 times. (defrost) switch 2 times. e. Make sure that the display indicates 43.