P1A7E CHEVROLET - Starter/Generator Control Module Overtemperature High Voltage System Disabled
P1a7e Chevrolet DescriptionThe Starter/Generator Control Module (SGCM) monitors its internal fluid temperature sensors to control the SGCM coolant pump and SGCM cooling fan. The internal fluid temperature sensors of the SGCM are thermistors and are not serviceable. When the internal fluid temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the internal fluid temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The input parameters are not displayed on the scan tool. The SGCM calculates the estimated temperature of the electronics to interpret the total temperature of the SGCM. This value is displayed on the scan tool.
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