STEERING LOCK SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Steering wheel cannot be unlocked (the engine cannot be started). | Operation check | |
| Check for DTCs in the smart entry and start system. | ||
| Check for DTCs in the engine immobiliser system. | ||
| Check that the "Lock/Unlock Receive" item in the Data List of the certification ECU (smart key ECU assembly) displays YES within 10 seconds after starting the engine. (If it displays NO, see "No steering unlock command" in this table.) | ||
| Steering lock ECU power source circuit | ||
| Check the input signal from the IGE terminal of the steering lock ECU. | ||
| Replace the steering lock ECU. | ||
| Steering wheel cannot be unlocked (no steering unlock command). | Check that the "S Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - |
| Check that the "L Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - | |
| Replace the certification ECU (smart key ECU assembly). | - | |
| Steering wheel cannot be locked. | Check for DTCs in the smart entry and start system. | |
| Check for DTCs in the engine immobiliser system. | ||
| With the engine switch off and the shift lever in P, open and close the driver door. After that, check that the "Lock/Unlock Receive" item in the Data List of the certification ECU (smart key ECU assembly) displays YES within 10 seconds. (If it displays NO, see "No steering lock command" in this table.) | ||
| Steering lock ECU power source circuit | ||
| Check the input signal from the IGE terminal of the steering lock ECU. | ||
| Replace the steering lock ECU. | ||
| Steering wheel cannot be locked (no steering lock command). | Door courtesy switch circuit | |
| Check that the "S Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - | |
| Check that the "L Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - | |
| Replace the certification ECU (smart key ECU assembly). | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not start. | Operation check | |
| Check for DTCs in the smart entry and start system. | ||
| Check for DTCs in the engine immobiliser system. | ||
| Check that the engine switch is turned on (IG). | - | |
| Check cranking operation. (If cranking operation is possible, see "Engine does not start due to the engine immobiliser" in this table.) | - | |
| Check the "Shift P Signal" item in the Data List of the main body ECU and confirm that the shift signal is normal. | - | |
| Check whether the steering wheel is locked or unlocked. (If it is locked, see "Steering wheel cannot be unlocked" in the Steering Lock System Function table.) | - | |
| Steering lock ECU power source circuit | - | |
| Check the output signal from the SLP terminal of the steering lock ECU. | ||
| Check the output signal from the ST SW of the certification ECU (smart key ECU assembly) (DTC B2275). | ||
| Replace the main body ECU. | - | |
| Engine does not start due to the engine immobiliser. | Check that the "L Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - |
| Check that the "Engine Start Request" item in the Data List of the certification ECU (smart key ECU assembly) displays YES. (If it displays NO, replace the certification ECU (smart key ECU assembly).) | - | |
| Check that the "S Code Check" item in the Data List of the certification ECU (smart key ECU assembly) displays OK. (If it displays NG, replace the ID code box (immobiliser code ECU).) | - | |
| Replace the ID code box (immobiliser code ECU). | - |