COMBUSTION TYPE POWER HEATER SYSTEM DIAGNOSTIC TROUBLE CODE CHART
| DTC Code | Detection Item | DTC Detection Condition | See page |
|---|---|---|---|
| 010 | Over Voltage Shutoff | Battery voltage is 14 V or higher for 20 seconds or more. | |
| 011 | Under Voltage Shutoff | Battery voltage is 11 V or less for 20 seconds or more. | |
| 012 | Overheating | The surface sensor or temperature control sensor detects a temperature of 125°C (257°F) or more. | |
| 014 | Difference Evaluation Overheating | When the engine coolant temperature is 80°C (176°F) and the heater assembly is operating, the difference in temperatures detected by the surface sensor and temperature control sensor is 25°C (77°F) or more. | |
| 015 | Operating Block caused by Overheating | The temperature control sensor detects overheating of the engine coolant, and the ECU stops the operation of the heater assembly (one or both of DTCs 012 and 014 are detected 10 times in a row). | |
| 016 | Difference Evaluation 2 | The difference in temperatures detected by the surface sensor and temperature control sensor is 30°C (86°F) or more. | |
| 017 | Hardware Overheating | When neither DTC 012 nor 014 is detected, the temperature control sensor or surface sensor detects a temperature of 130°C (266°F) or more. | |
| 020 | Glow Plug Malfunction | Operation stop of the glow plug is detected (open in the circuit). | |
| 021 | Glow Plug Output Overload | Overload on the glow plug or a short in the wire harness that is connected to the glow plug is detected. |
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| 022 | Glow Plug Output Error | An error is detected in the output from the ECU to the glow plug, or a problem with the wire harness that is connected to the glow plug is detected. | |
| 025 | Short in K-line Circuit | A short circuit is detected in the diagnostic communication line in the heater assembly. | |
| 030 | Abnormal Combustion Air Blower Motor Speed | Air blower motor speed is out of the allowable range (8800 rpm to 10400 rpm) (an object may be caught in or between parts around the air blower motor). | |
| 031 | Combustion Air Blower Motor Malfunction | Operation stop of the air blower motor is detected (open in the circuit). | |
| 032 | Short in Combustion Air Blower Motor Circuit | A short circuit is detected in the wire harness which is connected to the air blower motor. | |
| 034 | Combustion Air Blower Motor Output Error | An error is detected in the output from the ECU to the air blower motor, or a problem with the wire harness that is connected to the air blower motor is detected. | |
| 047 | Short in Heater Fuel Pump Circuit | A short is detected in the heater pump assembly circuit. | |
| 048 | Heater Fuel Pump Malfunction | Operation stop of the heater pump assembly is detected (open in the circuit). | |
| 049 | Heater Fuel Pump Output Error | An error is detected in the output to the heater pump assembly. | |
| 050 | Detection of No Ignition | The ECU is locked as a result of 10 successive heater ignition failures. | |
| 051 | Cold Blow Time Exceeded | After the heater assembly is turned on, the temperature of the flame sensor is 90°C (194°F) or more for 600 seconds or more before heater ignition begins. | |
| 052 | Safety Time Exceeded | A heater ignition failure is detected. | |
| 054 | High Setting of Flame Cutout | Combustion ends abnormally (high output operation). | |
| 056 | Low Setting of Flame Cutout | Combustion ends abnormally (low output operation). | |
| 060 | Overheating Control Sensor Malfunction | Operation stop of the temperature control sensor is detected (open in the circuit). | |
| 061 | Short in Overheating Control Sensor Circuit | A short is detected in the temperature control sensor circuit. | |
| 064 | Flame Sensor Malfunction | Operation stop of the flame sensor is detected (open in the circuit). | |
| 065 | Short in Flame Sensor Circuit | A short is detected in the flame sensor circuit. | |
| 071 | Surface Sensor Malfunction | Operation stop of the surface sensor is detected (open in the circuit). | |
| 072 | Short in Surface Sensor Circuit | A short is detected in the surface sensor circuit. | |
| 074 | ECU Overheating | The ECU stops operating due to overheating. | |
| 090 | ECU Internal Malfunction / Reset Detection | An internal malfunction of the control unit is detected. | |
| 091 | Repeated Resets Detection | Reset operation is repeated too many times. | |
| 092 | ROM Error | A control unit (ROM) error is detected. | |
| 093 | RAM Error | A control unit (RAM) error is detected. | |
| 094 | Transistor Malfunction | A transistor malfunction due to frequent operation interruptions is detected. | |
| 095 | Software Stuck Overflow | A software stuck overflow is detected. | |
| 096 | Operation Locked Detection | An operation lock due to the absence of a valid process is detected. | |
| 097 | ECU Defects | An internal control unit malfunction is detected. | |
| 098 | Main Relay Malfunction | A main relay malfunction is detected. | |
| 099 | EEPROM Error | An EEPROM error is detected. |