General Information
Component Location
General Description
Coolant temperature is detected by a water temperature sensor located at the heater unit. The A/C ECU uses coolant temperature to control the cold engine lockout function. The cold engine lockout function reduces blower speed until coolant temperature reaches the threshold value.
DTC Description
Air conditioner Control Module sets DTC B1202 if water temperature sensor has been detected over 4.9V for 4 seconds.
DTC Detecting Condition
Specification
** Resistance value of Water temperature sensor as a function of temperature.
Diagnostic Circuit Diagram