Enable Criteria

• ECT at 158°F(70°C) or higher.
• Intake air temperature (IAT) at 20°F (-7°C) or higher.
• Vehicle speed sensor (VSS) reads more then 25 mph (40km/h).

• At engine start up, ECT and IAT are higher then 32°F (0°C), but lower then 95°F (35°C).
• At engine start up, the ECT and IAT are within 13°F (7°C) of each other.

ECT at 140°F (60°C) or higher.

ECT at 176°F (80°C)or higher