Cold Soak Procedure
Let vehicle cold soak for 8 hours or until the difference between IAT and ECT is less than 13°F (7°C)
Examples:
Scenario 1
ECT = 75°F (24°C)
IAT = 60°F (16°C)
Difference between ECT and IAT is 15°F (8°C)
→ The monitor will not run because difference between ECT and IAT is greater than 13°F (7°C)
Scenario 2
ECT = 70°F (21°C)
IAT = 68°F (20°C)
Difference between ECT and IAT is 2°F (1°C)
→ The monitor will run because difference between ECT and IAT is less than 13°F (7°C)