Heater Output Temperature Check

Preparation

With the engine sufficiently cool, remove the radiator cap, start the engine, and allow the engine to idle. Set the heater controls to "HTR" mode, full "RED" temperature, and "HIGH" blower speed. When coolant flow in the radiator is visible through the filler neck, install the radiator cap.

NOTICE: Some air bleed will occur through defroster vent In all modes Side window defogger outlets should have air flow in all mode selections. Lap vents must be checked for the following reasons:

1. Barrel rotation.
2. Vane operation.
3. Barrel and vanes must hold position in high blower.

Temperature Check

When the engine is warmed up (after approximately 20 minutes of operation), drive the vehicle. Use an accurate thermometer to determine the temperature of the outside air and the temperature of the air discharged at the floor outlets with the vehicle moving at 48 km/h (30 mph). Minimum acceptable heater output temperatures at four different outside air temperatures are shown in the table below.