Toyota Lexus Is250, Is220D. Gse20 Ale20POWER STEERING POWER STEERING SYSTEM PRECAUTION PROBLEM SYMPTOMS TABLE ON-VEHICLE INSPECTION ELECTRONIC POWER STEERING SYSTEM PRECAUTION PARTS LOCATION(2005/08 - 2005/11) PARTS LOCATION(2005/11 - ) SYSTEM DIAGRAM SYSTEM DESCRIPTION HOW TO PROCEED WITH TROUBLESHOOTING(2005/08 - 2005/11) HOW TO PROCEED WITH TROUBLESHOOTING(2005/11 - ) CALIBRATION PROBLEM SYMPTOMS TABLE(2005/08 - 2005/11) PROBLEM SYMPTOMS TABLE(2005/11 - ) TERMINALS OF ECU DIAGNOSIS SYSTEM DTC CHECK / CLEAR FREEZE FRAME DATA FAIL-SAFE CHART DATA LIST / ACTIVE TEST DIAGNOSTIC TROUBLE CODE CHART(2005/08 - 2005/11) DIAGNOSTIC TROUBLE CODE CHART(2005/11 - ) C1511 C1555 C1512 C1523 C1513 C1524 C1515 C1528 C1525 C1541(2005/08 - 2005/11) C1516 C1541(2005/11 - ) C1526 C1551 C1521 C1552 C1522 C1581 C1531 U0105(2005/08 - 2005/11) C1532 U0121(2005/08 - 2005/11) C1533 U0105(2005/11 - ) C1534 U0121(2005/11 - ) C1554 PS Warning Light Remains ON PS Warning Light does not Come ON STEERING GEAR COMPONENTS REMOVAL DISASSEMBLY INSPECTION REASSEMBLY INSTALLATION POWER STEERING ECU COMPONENTS REMOVAL INSTALLATION