Section 421 (Air Conditioning System - Diagnostics)
WARNING: This page is about a different car, the 2005 Lexus GS 430 and 2005 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Pre-Check
- Diagnostic Trouble Code Chart
- Terminals Of Ecu
- Problem Symptoms Table
- Circuit Inspection
- DTC B1411/11: Room Temperature Sensor Circuit
- DTC B1412/12: Ambient Temperature Sensor Circuit
- DTC B1413/13: Evaporator Temperature Sensor Circuit
- DTC B1418/18: Exhaust gas sensor circuit
- DTC B1421/21: Solar Sensor Circuit (Passenger side)
- DTC B1422/22: Compressor Lock Sensor Circuit
- DTC B1423/23: Pressure Switch Circuit
- DTC B1424/24: Solar Sensor Circuit (Driver side)
- DTC B1431/31: Air Mix Damper Position Sensor Circuit (Passenger side) DTC B1441/41 Air Mix Damper Position Sensor Circuit (Passenger side)
- DTC B1432/32: Air Inlet Damper Position Sensor Circuit, DTC B1442/42 Air Inlet Damper Position Sensor Circuit
- DTC B1433/33: Air Outlet Damper Position Sensor Circuit, DTC B1443/43 Air Outlet Damper Position Sensor Circuit
- DTC B1436/36: Air Mix Damper Position Sensor Circuit (Driver side), DTC B1446/46 Air Mix Damper Position Sensor Circuit (Driver side)
- DTC B1441/41: Air Mix Damper Control Servomotor Circuit (Passenger side)
- DTC B1442/42: Air Inlet Damper Control Servomotor Circuit
- DTC B1443/43: Air Outlet Damper Control Servomotor Circuit
- DTC B1446/46: Air Mix Damper Control Servomotor Circuit (Passenger side)
- Back Up Power Source Circuit
- ACC Power Source Circuit
- Blower Motor Circuit
- Compressor Circuit