INSPECTION PROCEDURE 1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR  (a) Partially immerse the sensor in water and warm up the water. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
If the result is not as specified, replace the engine coolant temperature sensor. NOTICE: When checking the sensor in water, keep the terminals dry. After the check, wipe the sensor dry. HINT: If the result is as specified, do not replace the engine coolant temperature sensor. |
Toyota Tundra Service Manual > Lighting System: Light Sensor Circuit Malfunction (B1244)
DESCRIPTION The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights a ...
