MX3114N TROUBLESHOOTING 7 – 20
H2-01 Thermistor open trouble (TH_LM)
H2-02 Thermistor open trouble (TH_US)
H2-03 Thermistor open trouble
(TH_UM_AD1)
H3-00 Fusing section high temperature
trouble (TH_UM)
H3-01 Fusing section high temperature
trouble (TH_LM)
H3-02 Fusing section high temperature
trouble (TH_US)
H4-00 Fusing section low temperature
trouble (TH_UM_AD2)
Trouble content
Detail PCU
Cause Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Check the connector in the fusing section.
Trouble content
Detail PCU
Cause Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Check the connector in the fusing section.
Trouble content
Detail PCU
Cause Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Check the connector in the fusing section.
Trouble content
Detail PCU
Cause The fusing temperature exceeds the specified level.
Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
HL control PWB trouble
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Replace the HL control PWB.
Trouble content
Detail PCU
Cause The fusing temperature exceeds the specified level.
Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
HL control PWB trouble
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Replace the HL control PWB.
Trouble content
Detail PCU
Cause The fusing temperature exceeds the specified level.
Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
HL control PWB trouble
Check & Remedy Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Replace the HL control PWB.
Trouble content The fusing temperature does not reach the specified
level within the specified time from turning ON the
power relay.
Detail PCU
Cause Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble.
Thermostat trouble.
Connector, harness connection trouble.
HL control PWB trouble.
Power unit trouble.
Check & Remedy Use SIM14 to cancel the trouble.
Use SIM44-14 to check the state of the thermistor.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Replace the thermistor.
Replace the heater lamp.
Replace the PCU PWB.
Replace the thermostat.
Check connection of the connector and the harness.
Replace the HL control PWB.
Replace the power unit.
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