Code :

Code: H2-02
Description: Lower thermistor open (PRTH)
Causes: Thermistor trouble, control PWB trouble. Fusing section connector trouble. AC power source trouble. The fusing unit is not installed.
Remedy: Check connection of the harness and the connector from the thermistor to the control PWB.

Code: H2-03
Description: Non-contact main thermistor (reparation) open (RTH1-d_C)
Causes: Thermistor trouble, control PWB trouble, fusing section connector connection trouble, AC power trouble. Fusing unit not installed.
Remedy: Check the harness and the connector between the thermistor and the control PWB.

Code: H3-00
Description: Non-contact main thermistor high temperature trouble (RTH1_d). The fusing temperature in the PWB exceeds the specified level
Causes: Thermistor trouble, control PWB trouble. Fusing section connector connection trouble. AT power source trouble
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the heater lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the control PWB. It the lamp keeps ON, check the AC PWB, the control PWB lamp control circuit. Cancel the trouble with Sim. 14.

Code: H3-01
Description: Sub thermistor high temperature trouble (RTH2). The fusing temperature in the PWB exceeds the specified level
Causes: Thermistor trouble, control PWB trouble. Fusing section connector connection trouble. AT power source trouble
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the heater lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the control PWB. It the lamp keeps ON, check the AC PWB, the control PWB lamp control circuit. Cancel the trouble with Sim. 14.

Code: H3-02
Description: Lower thermistor high temperature trouble (PRTH). The fusing temperature in the PWB exceeds the specified level
Causes: Thermistor trouble, control PWB trouble. Fusing section connector connection trouble. AT power source trouble.
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the heater lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the control PWB. It the lamp keeps ON, check the AC PWB, the control PWB lamp control circuit. Cancel the trouble with Sim. 14.

Code: H4-00
Description: Non-contact main thermistor low temperature trouble (RTH1-d). The set temperature is not reached with the specified time after turning on the power relay
Causes: Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. AC power source trouble. Interlock switch trouble
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the PCU PWB. If the lamp does not light up, check the heater lamp and the thermostat for breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. Cancel the trouble with Sim. 14.

Code: H4-01
Description: Sub thermistor low temperature trouble (RTH2). The set temperature is not reached with the specified time after turning on the power relay
Causes: Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. AC power source trouble. Interlock switch trouble.
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the PCU PWB. If the lamp does not light up, check the heater lamp and the thermostat for breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. Cancel the trouble with Sim. 14.

Code: H4-02
Description: Lower thermistor low temperature trouble (PRTH). The set temperature is not reached with the specified time after turning on the power relay
Causes: Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. AC power source trouble. Interlock switch trouble
Remedy: Check blinking of the heater lamp with Sim. 5-2. If the lamp blinks normally, check the thermistor and the harness. Check the thermistor input circuit section of the PCU PWB. If the lamp does not light up, check the heater lamp and the thermostat for breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. Cancel the trouble with Sim. 14.