General Information

Head Unit

U1003 Temperature Sensor Signal Error in Head Unit - General Information

Component Location





General Description

The temperature sensor of Head unit detect the temperature rising to prevent abnormal status of Head Unit.

DTC Description

This code is set when a temperature sensor of Head unit detect that the temperature is over 85 °C, At that time Tuner &Amplifier can be abnormal status. If the temperature is around 85 °C, the fan is running to make the temperature down. After cooling, Tuner &Amplifier is normal status under 75 °C.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data








FIG.1) Start of Wake up line diagnosis test
FIG.2) Result of Wake up line diagnosis test