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Problem Symptoms Table

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

STEERING LOCK SYSTEM FUNCTION

Symptom Suspected Area See
  1. Steering wheel cannot be unlocked (the engine cannot be started).
 1. Initialization Refer to INITIALIZATION 
2. Check for DTCs in the smart key system (for 2GR-FE). Refer to DTC CHECK / CLEAR
3. Check for DTCs in the smart key system (for 2AR-FE). Refer to DTC CHECK / CLEAR
4. Check for DTCs in the engine immobilizer system. Refer to DTC CHECK / CLEAR
5. Check that the Lock/Unlock Receive 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.) Refer to DATA LIST / ACTIVE TEST 
6. Check the input signal from the IGE terminal of the steering lock ECU. Refer to Steering Lock Motor Drive Power Circuit
7. Steering lock ECU power source circuit. Refer to Power Source Circuit
8. Replace the steering lock ECU. Refer to DISASSEMBLY
Steering wheel cannot be unlocked (no steering unlock command). 1. Check that the S Code Check 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 Check 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 key system (for 2GR-FE). Refer to DTC CHECK / CLEAR
2. Check for DTCs in the smart key system (for 2AR-FE). Refer to DTC CHECK / CLEAR
3. Check for DTCs in the engine immobilizer system. Refer to DTC CHECK / CLEAR
4. With the engine switch off and the shift in the P position, open and close the drivers door. After that, check that the Lock/Unlock Receive 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.) Refer to DATA LIST / ACTIVE TEST 
5. Check the input signal from the IGE terminal of the steering lock ECU. Refer to Steering Lock Motor Drive Power Circuit
6. Steering lock ECU power source circuit. Refer to Power Source Circuit
7. Replace the steering lock ECU. Refer to DISASSEMBLY
Steering wheel cannot be locked (no steering lock command). 1. Courtesy light switch circuit Refer to Door Courtesy Switch Circuit
2. Check that the S Code Check 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 Check 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 KEY SYSTEM FUNCTION

Symptom Suspected Area See
Engine does not start. 1. Initialization Refer to INITIALIZATION 
2. Check for DTCs in the smart key system (for 2GR-FE). Refer to DTC CHECK / CLEAR
3. Check for DTCs in the smart key system (for 2AR-FE). Refer to DTC CHECK / CLEAR
4. Check for DTCs in the engine immobilizer system. Refer to DTC CHECK / CLEAR
5. Check that the engine switch is turned on (IG). -
6. Check cranking operation. (If cranking operation is possible, see  1"Engine does not start due to the engine immobilizer" in this table.) -
7. Check Shift P Sig in the Data List of the main body ECU and confirm that the shift signal is normal. -
8. Check whether the steering wheel is locked or unlocked. (If it is locked, see  1"Steering wheel cannot be unlocked" in the steering lock function table.) -
9. Check the output from the SLP terminal of the steering lock ECU. Refer to Unlock Position Sensor Signal Circuit
10. Check the output signal from the STSW of the certification ECU (DTC B2275) (for 2GR-FE). Refer to DTC B2275: STSW Monitor Malfunction
11. Check the output signal from the STSW of the certification ECU (DTC B2275) (for 2AR-FE). Refer to DTC B2275: STSW Monitor Malfunction
12. Replace the main body ECU. -
  1. Engine does not start due to the engine immobilizer.
 1. Check that the L Code Check item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.) -
2. Check that the Engine Start Condition 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 Check 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. -
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