COMBUSTION TYPE POWER HEATER SYSTEM, Diagnostic DTC:016, 020, 021, 022, 025, 030, 031, 032, 034, 060, 061, 064, 065, 071, 072, 074, 090, 091, 092, 093, 094, 095, 096, 097, 098, 099
| DTC Code | DTC Name |
|---|---|
| 016 | Difference Evaluation 2 |
| 020 | Glow Plug Malfunction |
| 021 | Glow Plug Output Overload |
| 022 | Glow Plug Output Error |
| 025 | Short in K-line Circuit |
| 030 | Abnormal Combustion Air Blower Motor Speed |
| 031 | Combustion Air Blower Motor Malfunction |
| 032 | Short in Combustion Air Blower Motor Circuit |
| 034 | Combustion Air Blower Motor Output Error |
| 060 | Overheating Control Sensor Malfunction |
| 061 | Short in Overheating Control Sensor Circuit |
| 064 | Flame Sensor Malfunction |
| 065 | Short in Flame Sensor Circuit |
| 071 | Surface Sensor Malfunction |
| 072 | Short in Surface Sensor Circuit |
| 074 | ECU Overheating |
| 090 | ECU Internal Malfunction / Reset Detection |
| 091 | Repeated Resets Detection |
| 092 | ROM Error |
| 093 | RAM Error |
| 094 | Transistor Malfunction |
| 095 | Software Stuck Overflow |
| 096 | Operation Locked Detection |
| 097 | ECU Defects |
| 098 | Main Relay Malfunction |
| 099 | EEPROM Error |
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| 016 | The difference in temperatures detected by the surface sensor and temperature control sensor is 30°C (86°F) or more. |
|
| 020 | Operation stop of the glow plug is detected. (Open in the circuit) |
|
| 021 | Overload on the glow plug or a short in the wire harness that is connected to the glow plug is detected. |
|
| 022 | An error is detected in 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 | A short circuit is detected in the diagnostic communication line in the combustion heater. | Wire harness or connector (combustion heater assembly) |
| 030 | 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.) | Air blower motor (combustion heater assembly) |
| 031 | Operation stop of the air blower motor is detected. (Open in the circuit) |
|
| 032 | A short circuit is detected in the wire harness which is connected to the air blower motor. | Wire harness or connector (combustion heater assembly) |
| 034 | An error is detected in 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. |
|
| 060 | Operation stop of the temperature control sensor is detected. (Open in the circuit) |
Temperature control sensor (combustion heater assembly) |
| 061 | A short is detected in the temperature control sensor circuit. |
|
| 064 | Operation stop of the flame sensor is detected. (Open in the circuit) |
Flame sensor (combustion heater assembly) |
| 065 | A short is detected in the flame sensor circuit. |
|
| 071 | Operation stop of the surface sensor is detected. (Open in the circuit) |
Surface sensor (combustion heater assembly) |
| 072 | A short is detected in the surface sensor circuit. |
|
| 074 | The power heater ECU stops operating due to overheating. | Power heater ECU (combustion heater assembly) |
| 090 | An internal malfunction of the control unit is detected. | Power heater ECU (combustion heater assembly) |
| 091 | Reset operation is repeated too many times. | Power heater ECU (combustion heater assembly) |
| 092 | A control unit (ROM) error is detected. | Power heater ECU (combustion heater assembly) |
| 093 | A control unit (RAM) error is detected. | Power heater ECU (combustion heater assembly) |
| 094 | A transistor malfunction due to frequent operation interruptions is detected. | Power heater ECU (combustion heater assembly) |
| 095 | A software stuck overflow is detected. | Power heater ECU (combustion heater assembly) |
| 096 | An operation lock due to the absence of valid process is detected. | Power heater ECU (combustion heater assembly) |
| 097 | An internal control unit malfunction is detected. | Power heater ECU (combustion heater assembly) |
| 098 | A main relay malfunction is detected. | Power heater ECU (combustion heater assembly) |
| 099 | An EEPROM error is detected. | Power heater ECU (combustion heater assembly) |
PROCEDURE
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CHECK COMBUSTION HEATER ASSEMBLY
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Clear the DTCs stored in the memory using the DTC tester Click here.
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Recheck for DTC Click here.
OK DTC is not output.
OK 
USE SIMULATION METHOD TO CHECK Click here
NG
REPLACE COMBUSTION HEATER ASSEMBLY Click here
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