Test NTC-6A: Checking Coolant Sensor Calibration

NOTE: Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS before proceeding.

Turn ignition on. Using scan tool, read Engine Coolant Temperature (ECT) sensor value. If engine operating temperature is more than 180°F (82°C), allow engine to cool to 150°F (66°C). Start engine. While monitoring scan tool, allow engine to reach normal operating temperature of more than 180°F (82°C). Go to next step.
If ECT sensor value increased in a smooth transition, go to next step. If ECT sensor value did not increase in a smooth transition, verify engine cooling system is not malfunctioning. If engine cooling system is malfunctioning, repair as necessary. Perform TEST VER-2A: ROAD TEST VERIFICATION . If engine cooling system is not malfunctioning, replace ECT sensor. Perform TEST VER-2A: ROAD TEST VERIFICATION .
If engine coolant temperature reached 180°F (82°C) or more, cooling system is functioning properly. Test is complete. If engine coolant temperature did not reach 180°F (82°C) or more, verify engine cooling system is not malfunctioning. If engine cooling system is malfunctioning, repair as necessary. Perform TEST VER-2A: ROAD TEST VERIFICATION . If engine cooling system is not malfunctioning, replace ECT sensor. Perform TEST VER-2A: ROAD TEST VERIFICATION .