COMBUSTION TYPE POWER HEATER SYSTEM DIAGNOSTIC TROUBLE CODE CHART
DTC No. |
Detection Item |
DTC Detection Condition |
Link |
|---|---|---|---|
010 |
Over Voltage Shutoff |
Battery voltage is 14 V or more for 20 seconds or more. |
|
011 |
Under Voltage Shutoff |
Battery voltage is 10 V or less for 20 seconds or more. |
|
012 |
Overheating |
The surface sensor or control overheating 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 control overheating sensor is 25°C (77°F) or more. |
|
015 |
Operating Block caused by Overheating |
The control overheating sensor detects overheating of the engine coolant, and the power heater ECU stops the operation of the heater assembly. (DTCs 012 and/or 014 are detected 10 times in a row.) |
|
016 |
Difference Evaluation 2 |
The difference in temperatures detected by the surface sensor and control overheating sensor is 30°C (86°F) or more. |
|
017 |
Hardware Overheating |
When neither DTC 012 nor 014 is detected, the control overheating sensor or surface sensor detects a temperature of 130°C (266°F). |
|
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. |
|
022 |
Glow Plug Output Error |
An error is detected in the signal output from the power heater 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 signal output from the power heater 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 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 the heater ignites. |
|
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 control overheating sensor is detected. (Open in the circuit) |
|
061 |
Short in Overheating Control Sensor Circuit |
A short is detected in the control overheating 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 heater assembly (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 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. |