Heater & Air Conditioning System. Lexus Gs430, Gs300. Uzs190 Grs190
Air Conditioning. Lexus Gs430, Gs300. Uzs190 Grs190
Air Conditioning System -- Diagnostic Trouble Code Chart |
| DTC No. | Detection Item | Trouble Area | Memory | Diagnostic Note | See page |
| B1411/11 | Room Temperature Sensor Circuit | Room temperature sensor Harness and connector between room temperature sensor and A/C amplifier A/C amplifier | ○ (8.5 min. or more) | If room temperature is approx. -18.6°C (1.48°F) or lower, DTC B1411/11 may be output even though system is normal | Click here |
| B1412/12 | Ambient Temperature Sensor Circuit | Ambient temperature sensor Harness and connector between ambient temperature sensor and ECM ECM Multiplex communication circuit A/C amplifier | ○ (8.5 min. or more) | If ambient temperature is approx. -52.9°C (-63.22°F) or lower, malfunction code may be output even though system is normal | Click here |
| B1413/13 | Evaporator Temperature Sensor Circuit | A/C conditioning harness (evaporator temperature sensor) A/C amplifier | ○ (8.5 min. or more) | - | Click here |
| B1418/18 | Exhaust Gas Sensor Circuit | Exhaust gas sensor (emission gas sensor) Harness and connector between exhaust gas sensor (emission gas sensor) and A/C amplifier A/C amplifier | - | - | Click here |
| B1421/21 | Solar Sensor Circuit (Passenger Side) | Solar sensor Harness and connector between solar sensor and A/C amplifier Harness and connector between solar sensor and multiplex network body ECU (cowl side junction block ECU RH) A/C amplifier | ○ (8.5 min. or more) (only when circuit is shorted) | If check is performed in dark place, DTC B1421/21 or B1424/24 (solar sensor circuit abnormal) may be output | Click here |
| B1422/22 | Compressor Lock Sensor Circuit | A/C compressor A/C compressor drive belt A/C compressor and magnetic clutch lock sensor Harness or connector between ECM and A/C compressor ECM A/C amplifier | - | - | Click here |
| B1423/23 | Pressure Switch Circuit | Pressure sensor Harness and connector between pressure sensor and A/C amplifier Refrigerant pipe line A/C amplifier | - | - | Click here |
| B1424/24 | Solar Sensor Circuit (Driver Side) | Solar sensor Harness and connector between solar sensor and A/C amplifier Harness and connector between solar sensor and multiplex network ECU (cowl side junction block ECU RH) A/C amplifier | ○ (8.5 min. or more) (Only when circuit is shorted) | If check is performed in dark place, DTC B1421/21 or B1424/24 (solar sensor circuit abnormal) may be output | Click here |
| B1441/41 | Air Mix Damper Control Servomotor Circuit (Passenger Side) | A/C amplifier Air conditioning harness Air mix control servomotor | ○ (30 sec.) | - | Click here |
| B1443/43 | Air Outlet Damper Control Servomotor Circuit | A/C amplifier Air conditioning harness Air outlet control servomotor | ○ (30 sec.) | - | Click here |
| B1446/46 | Air Mix Damper Control Servomotor Circuit (Driver Side) | A/C amplifier Air conditioning harness Air mix damper control servomotor | ○ (30 sec.) | - | Click here |
| B1462/62 | Room Humidity Sensor Circuit | Room humidity sensor (room temperature sensor) Harness and connector between room humidity sensor (room temperature sensor) and A/C amplifier A/C amplifier | - | - | Click here |
| B1442/42 | Air Inlet Damper Control Servomotor Circuit | A/C amplifier Air conditioning harness Air inlet control servomotor | ○ (30 sec.) | - | Click here |
| B1445/45 | Front Passenger Seat Side Cool Air Bypass Damper Control Servomotor Circuit | Cool air by-pass damper control servomotor Air conditioning harness A/C amplifier | ○ (30 sec.) | - | Click here |
| B1451/51 | Compressor Solenoid Circuit | A/C compressor Harness and connector between A/C amplifier and solenoid of externally changeable compressor A/C amplifier | - | - | Click here |
| B1461/61 | Emission Gas NOx Sensor Circuit | Exhaust gas sensor (emission gas NOx sensor) Harness and connector between exhaust gas sensor (emission gas NOx sensor) and A/C amplifier A/C amplifier | - | - | Click here |
| B1497/97 | BUS IC Communication Malfunction | Wire harness A/C amplifier | ○ (10 sec. or more) | - | Click here |