Heater & Air Conditioning System. Lexus Is250, Is220D. Gse20 Ale20
Heater. Lexus Is250, Is220D. Gse20 Ale20
REPLACE COMBUSTION HEATER ASSEMBLY
DTC 016 Difference Evaluation 2 |
DTC 020 Glow Plug Malfunction |
DTC 021 Glow Plug Output Overload |
DTC 022 Glow Plug Output Error |
DTC 025 Short in K-line Circuit |
DTC 030 Abnormal Combustion Air Blower Motor Speed |
DTC 031 Combustion Air Blower Motor Malfunction |
DTC 032 Short in Combustion Air Blower Motor Circuit |
DTC 034 Combustion Air Blower Motor Output Error |
DTC 060 Overheating Control Sensor Malfunction |
DTC 061 Short in Overheating Control Sensor Circuit |
DTC 064 Flame Sensor Malfunction |
DTC 065 Short in Flame Sensor Circuit |
DTC 071 Surface Sensor Malfunction |
DTC 072 Short in Surface Sensor Circuit |
DTC 074 ECU Overheating |
DTC 090 ECU Internal Malfunction / Reset Detection |
DTC 091 Repeated Resets Detection |
DTC 092 ROM Error |
DTC 093 RAM Error |
DTC 094 Transistor Malfunction |
DTC 095 Software Stuck Overflow |
DTC 096 Operation Locked Detection |
DTC 097 ECU Defects |
DTC 098 Main Relay Malfunction |
DTC 099 EEPROM Error |
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
| 016 | The difference in temperatures detected by the surface sensor and control overheating 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 assembly. | Combustion heater assembly |
| 030 | Air blower motor speed is out of the allowable range (8,800 rpm to 10,400 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 control overheating sensor is detected. (Open in the circuit) | Control overheating sensor (combustion heater assembly) |
| 061 | A short is detected in the control overheating 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) |
INSPECTION PROCEDURE
| 1.REPLACE COMBUSTION HEATER ASSEMBLY |
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