Electric Steering Lock - Problem Symptoms Table

Lexus IS250 IS220d GSE20 ALE20 - STEERING COLUMN


ELECTRIC STEERING LOCK - PROBLEM SYMPTOMS TABLE

Inspect the suspected areas in numerical order by referring to the corresponding pages when any of the following symptoms occurs:

STEERING LOCK FUNCTION:
SymptomSuspected areaSee page
Steering wheel cannot be unlocked (the engine cannot be started). 1. Initialization
2. Check for DTCs in the entry and start system.
3. Check for DTCs in the engine immobiliser system.
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.)
5. Check the output from the IGE terminal of the steering lock ECU.
6. Steering lock ECU power source circuit.
7. Replace the steering lock ECU. (for Manual Tilt)
8. Replace the steering lock ECU. (for Power Tilt and Power Telescopic Steering)
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 entry and start system.
2. Check for DTCs in the engine immobiliser system.
3. With the engine switch off and the shift 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.)
4. Check the output from the IGE terminal of the steering lock ECU.
5. Steering lock ECU power source circuit.
6. Replace the steering lock ECU. (for Manual Tilt)
7. Replace the steering lock ECU. (for Power Tilt and Power Telescopic)
Steering wheel cannot be locked (no steering lock command). 1. Courtesy light 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. -
PUSH BUTTON START FUNCTION:
SymptomSuspected areaSee page
Engine does not start. 1. Initialization
2. Check for DTCs in the entry and start system.
3. Check for DTCs in the engine immobiliser system.
4. Check that the engine switch is turned on. -
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.
9. Check the output signal from the ST SW of the certification ECU (DTC B2275). (for 4GR-FSE)
10. Replace the power source control 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. -