Diagnostic Trouble Code Chart
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.
If malfunction code is displayed during the DTC check, check the circuit listed for that code in the table shown in DIAGNOSTIC TROUBLE CODE CHART .
DIAGNOSTIC TROUBLE CODE INDEX CHART
| DTC | Description |
|---|---|
| B1411/11 | Room Temperature Sensor Circuit |
| B1412/12 | Ambient Temperature Sensor Circuit |
| B1413/13 | Evaporator Temperature Sensor Circuit |
| B1418/18 | Exhaust gas sensor circuit |
| B1421/21 | Solar Sensor Circuit (Passenger side) |
| B1422/22 | Compressor Lock Sensor Circuit |
| B1423/23 | Pressure Switch Circuit |
| B1424/24 | Solar Sensor Circuit (Driver side) |
| B1431/31 | Air Mix Damper Position Sensor Circuit (Passenger side) |
| B1441/41 | Air Mix Damper Position Sensor Circuit (Passenger side) |
| B1432/32 | Air Inlet Damper Position Sensor Circuit |
| B1442/42 | Air Inlet Damper Position Sensor Circuit |
| B1433/33 | Air Outlet Damper Position Sensor Circuit |
| B1443/43 | Air Outlet Damper Position Sensor Circuit |
| B1436/36 | Air Mix Damper Position Sensor Circuit (Driver side) |
| B1446/46 | Air Mix Damper Position Sensor Circuit (Driver side) |
| B1441/41 | Air Mix Damper Control Servomotor Circuit (Passenger side) |
| B1442/42 | Air Inlet Damper Control Servomotor Circuit |
| B1443/43 | Air Outlet Damper Control Servomotor Circuit |
| B1446/46 | Air Mix Damper Control Servomotor Circuit (Passenger side) |
HINT:
- *1 If the room temp, is approx. -20°C (-4°F) or lower, DTC B1411/11 may be output even though the system is normal.
- *2 If the ambient temperature is approx. -50°C (-58°F) or lower, a DTC may be output even though the system is normal.
- *3 If the check is being performed in a dark place, DTC B1421/21 (solar sensor circuit abnormal) could be displayed. In this case, perform DTC check again while shining a light, such as an inspection light, on the solar sensor. If DTC B1421/21 is still displayed, there could be trouble in the solar sensor circuit.
- *4 Compressor lock (DTC B1422/22) is indicated only for a current malfunction (See DTC B1422/22 COMPRESSOR LOCK SENSOR CIRCUIT
). To confirm DTC B1422/22, preform the following steps.
- With the engine ON, enter the DTC check mode.
- Press the R/F switch to enter actuator check mode, and set the operation to Step No. 3.
- Press the AUTO switch to return to DTC check mode.
- The DTC is displayed after approx. 3 sees.
- *5 The A/C control assembly memorizes the DTC of the respective malfunction when it occurs for period of time indicated in the brackets.