COMBUSTION TYPE POWER HEATER SYSTEM DIAGNOSTIC TROUBLE CODE CHART
Tech Tips
If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.
| DTC Code | Detection Item | DTC Detection Condition | Trouble Area | See page |
|---|---|---|---|---|
| 010 | Over Voltage Shutoff | Battery voltage is 14 V or higher for 20 seconds or more. | - Harness or connector - Heater assembly |
|
| 011 | Under Voltage Shutoff | Battery voltage is 11 V or less for 20 seconds or more. | - Harness or connector - Heater assembly |
|
| 012 | Overheating | The surface sensor or temperature control sensor detects a temperature of 125°C (257°F) or more. |
- Heater assembly (surface sensor) - Heater assembly (temperature control sensor) - Engine coolant circuit |
|
| 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°C) or more. |
- Heater assembly (surface sensor) - Heater assembly (temperature control sensor) - Engine coolant circuit |
|
| 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). |
- Engine coolant circuit - Heater assembly - Heater assembly (temperature control sensor) |
|
| 016 | Difference Evaluation 2 | The difference in temperatures detected by the surface sensor and temperature control sensor is 30°C (86°F) or more. |
- Heater assembly (surface sensor) - Heater assembly (temperature control sensor) - Engine coolant circuit |
|
| 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. |
- Heater assembly (glow plug) - Heater assembly (Harness or connector) |
|
| 020 | Glow Plug Malfunction | Operation stop of the glow plug is detected (open in the circuit). | - Heater assembly (glow plug) - Heater assembly (Harness or connector) |
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| 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. |
- Heater assembly (ECU) - Heater assembly (Harness or connector) |
|
| 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. |
- Heater assembly - Heater assembly (Harness or connector) |
|
| 025 | Short in K-line Circuit | A short circuit is detected in the diagnostic communication line in the heater assembly. |
Heater assembly (air blower motor) | |
| 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). |
- Heater assembly (air blower motor) - Heater assembly (Harness or connector) |
|
| 031 | Combustion Air Blower Motor Malfunction | Operation stop of the air blower motor is detected (open in the circuit). | Heater assembly (Harness or connector) | |
| 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. |
- Heater assembly (ECU) - Heater assembly (Harness or connector) |
|
| 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. |
- Harness or connector - Heater pump assembly - Heater assembly |
|
| 047 | Short in Heater Fuel Pump Circuit | A short is detected in the heater pump assembly circuit. | - Harness or connector - Heater pump assembly - Heater assembly |
|
| 048 | Heater Fuel Pump Malfunction | Operation stop of the heater pump assembly is detected (open in the circuit). |
- Harness or connector - Heater pump assembly - Heater assembly (ECU) |
|
| 049 | Heater Fuel Pump Output Error | An error is detected in the output to the heater pump assembly. | - Fuel pipe - Air duct - No. 1 exhaust pipe sub-assembly - No. 2 exhaust pipe sub-assembly - Fuel filter assembly - Heater pump assembly - Heater assembly (ECU) |
|
| 050 | Detection of No Ignition | The ECU is locked as a result of 10 successive heater ignition failures. | - No. 1 exhaust pipe sub-assembly - No. 2 exhaust pipe sub-assembly - Heater assembly |
|
| 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. |
- Fuel pipe - Air duct - No. 1 exhaust pipe sub-assembly - No. 2 exhaust pipe sub-assembly - Heater pump assembly - Heater assembly - Fuel filter assembly |
|
| 052 | Safety Time Exceeded | A heater ignition failure is detected. | - Fuel pipe - Air duct - No. 1 exhaust pipe sub-assembly - No. 2 exhaust pipe sub-assembly - Heater pump assembly - Heater assembly - Fuel filter assembly |
|
| 054 | High Setting of Flame Cutout | Combustion ends abnormally (high output operation). | - Fuel pipe - Air duct - No. 1 exhaust pipe sub-assembly - No. 2 exhaust pipe sub-assembly - Heater pump assembly - Heater assembly - Fuel filter assembly |
|
| 056 | Low Setting of Flame Cutout | Combustion ends abnormally (low output operation). | Heater assembly (temperature control sensor) | |
| 060 | Overheating Control Sensor Malfunction | Operation stop of the temperature control sensor is detected (open in the circuit). |
- Heater assembly (temperature control sensor) - Heater assembly (Harness or connector) |
|
| 061 | Short in Overheating Control Sensor Circuit | A short is detected in the temperature control sensor circuit. | Heater assembly (flame sensor) | |
| 064 | Flame Sensor Malfunction | Operation stop of the flame sensor is detected (open in the circuit). | - Heater assembly (flame sensor) - Heater assembly (Harness or connector) |
|
| 065 | Short in Flame Sensor Circuit | A short is detected in the flame sensor circuit. | Heater assembly (surface sensor) | |
| 071 | Surface Sensor Malfunction | Operation stop of the surface sensor is detected (open in the circuit). | - Heater assembly (surface sensor) - Heater assembly (Harness or connector) |
|
| 072 | Short in Surface Sensor Circuit | A short is detected in the surface sensor circuit. | Heater assembly (ECU) | |
| 074 | ECU Overheating | The ECU stops operating due to overheating. | Heater assembly (ECU) | |
| 090 | ECU Internal Malfunction / Reset Detection | An internal malfunction of the control unit is detected. | Heater assembly (ECU) | |
| 091 | Repeated Resets Detection | Reset operation is repeated too many times. | Heater assembly (ECU) | |
| 092 | ROM Error | A control unit (ROM) error is detected. | Heater assembly (ECU) | |
| 093 | RAM Error | A control unit (RAM) error is detected. | Heater assembly (ECU) | |
| 094 | Transistor Malfunction | A transistor malfunction due to frequent operation interruptions is detected. |
Heater assembly (ECU) | |
| 095 | Software Stuck Overflow | A software stuck overflow is detected. | Heater assembly (ECU) | |
| 096 | Operation Locked Detection | An operation lock due to the absence of a valid process is detected. | Heater assembly (ECU) | |
| 097 | ECU Defects | An internal control unit malfunction is detected. | Heater assembly (ECU) | |
| 098 | Main Relay Malfunction | A main relay malfunction is detected. | Heater assembly (ECU) | |
| 099 | EEPROM Error | An EEPROM error is detected. | Heater assembly (ECU) |