Problem Symptoms Table
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the suspected areas in numerical order by referring to the corresponding pages when any of the following symptoms occurs:
ELECTRIC STEERING LOCK FUNCTION:
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Steering wheel cannot be unlocked (the engine cannot be started). | 1. Initialization | INITIALIZATION |
| 2. Check for DTCs in the smart access system with pushbutton start. | DIAGNOSTIC TROUBLE CODE CHART | |
| 3. Check for DTCs in the engine immobilizer system. | DTC CHECK / CLEAR | |
| 4. Check that the LCK/UNLCK REC item in the DATA LIST of the certification ECU displays YES within 10 seconds after starting the engine. (If it displays NO, see "No steering unlock command" in this table.) | DTC CHECK / CLEAR | |
| 5. Check the input signal from the IGE terminal of the steering lock ECU. | STEERING LOCK MOTOR DRIVE POWER CIRCUIT | |
| 6. Steering lock ECU power source circuit. | POWER SOURCE CIRCUIT | |
| 7. Replace the steering lock ECU. | STEERING COLUMN ASSEMBLY | |
| Steering wheel cannot be unlocked (no steering unlock command). | 1. Check that the S CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - |
| 2. Check that the L CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - | |
| 3. Replace the certification ECU. | - | |
| Steering wheel cannot be locked. | 1. Check for DTCs in the smart access system with pushbutton start. | DIAGNOSTIC TROUBLE CODE CHART |
| 2. Check for DTCs in the engine immobilizer system. | DTC CHECK / CLEAR | |
| 3. With the engine switch off and the shift lever in the P position, open and close the drivers door. After that, check that the LCK/UNLCK REC item in the DATA LIST of the certification ECU displays YES within 10 seconds. (If it displays NO, see "No steering lock command" in this table.) | DTC CHECK / CLEAR | |
| 4. Check the input signal from the IGE terminal of the steering lock ECU. | STEERING LOCK MOTOR DRIVE POWER CIRCUIT | |
| 5. Steering lock ECU power source circuit. | POWER SOURCE CIRCUIT | |
| 6. Replace the steering lock ECU. | STEERING COLUMN ASSEMBLY | |
| Steering wheel cannot be locked (no steering lock command). | 1. Courtesy light switch circuit | DOOR COURTESY SWITCH CIRCUIT |
| 2. Check that the S CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - | |
| 3. Check that the L CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - | |
| 4. Replace the certification ECU. | - |
SMART ACCESS SYSTEM WITH PUSH-BUTTON START FUNCTION:
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not start. | 1. Initialization | INITIALIZATION |
| 2. Check for DTCs in the smart access system with pushbutton start. | DIAGNOSTIC TROUBLE CODE CHART | |
| 3. Check for DTCs in the engine immobilizer system. | DTC CHECK / CLEAR | |
| 4. Check that the engine switch is turned on (IG). | - | |
| 5. Check cranking operation. (If cranking operation is possible, see "Engine does not start due to the engine immobilizer" in this table.) | - | |
| 6. Check SHIFT P SIG in the DATA LIST of the power source control ECU and confirm that the shift signal is normal. | - | |
| 7. Check whether the steering wheel is locked or unlocked. (If it is locked, see "Steering wheel cannot be unlocked" in the steering lock function table.) | - | |
| 8. Check the output from the SLP terminal of the steering lock ECU. | UNLOCK POSITION SENSOR SIGNAL CIRCUIT | |
| 9. Check the output signal from the ST SW of the certification ECU (DTC B2275). | DTC B2275 STSW MONITOR MALFUNCTION | |
| 10. Replace the main body ECU. | - | |
| Engine does not start due to the engine immobilizer. | 1. Check that the L CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - |
| 2. Check that the ENG START REQ item in the DATA LIST of the certification ECU displays YES. (If it displays NO, replace the certification ECU.) | - | |
| 3. Check that the S CODE MACH item in the DATA LIST of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | - | |
| 4. Replace the ID code box. | - |