Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Problem Symptoms Table
HINT:
Use the table below to help determine the cause of a problem. The likely causes of the problem are indicated in descending order. Check each suspected area in order. Repair or replace faulty parts or perform adjustments as necessary.
| Symptom | Suspected Area | Refer to |
|---|---|---|
| Steering wheel cannot be unlocked (the engine cannot be started). | Check for DTCs in the push button start. | Refer to DTC CHECK / CLEAR |
| Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR | |
| Check the output from the IGE terminal of the steering lock ECU. | Refer to TERMINALS OF ECU | |
| Steering lock ECU power source circuit | Refer to Power Source Circuit | |
| Steering lock ECU. | Refer to TERMINALS OF ECU | |
| Steering wheel cannot be unlocked (no steering unlock command). | Replace the certification ECU. | - |
| Steering wheel cannot be locked. | Check for DTCs in the push button start. | Refer to DTC CHECK / CLEAR |
| Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR | |
| Check the output from the IGE terminal of the steering lock ECU. | Refer to TERMINALS OF ECU | |
| Steering lock ECU power source circuit | Refer to Power Source Circuit | |
| Steering lock ECU. | Refer to TERMINALS OF ECU | |
| Steering wheel cannot be locked (no steering lock command). | Courtesy light switch circuit | Refer to Door Courtesy Switch Circuit |
| Replace the certification ECU. | - |
| Symptom | Suspected Area | Refer to |
|---|---|---|
| Engine does not start. | Check for DTCs in the push button start. | Refer to DTC CHECK / CLEAR |
| Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR | |
| Check that the engine switch is turned on. | - | |
| Check cranking operation. (If cranking operation is possible, see "Engine does not start due to the engine immobilizer" in this table.) | - | |
| Check whether the steering wheel is locked or unlocked. (If it is locked, see "Steering wheel cannot be unlocked" in the STEERING LOCK FUNCTION steering lock function table.) | - | |
| Check the output from the SLP terminal of the steering lock ECU. | Refer to Unlock Position Sensor Signal Circuit | |
| Check the output signal from the STSW of the certification ECU (DTC B2275). | Refer to DTC B2275: STSW Monitor Malfunction | |
| Replace the power source control ECU. | - | |
| Engine does not start due to the engine immobilizer. | Replace the ID code box. | - |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.