Problem Symptoms Table
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.
STEERING LOCK SYSTEM FUNCTION:
| Symptom | Suspected Area | See |
|---|---|---|
| Steering wheel cannot be unlocked (the engine cannot be started). | Initialization | Refer to INITIALIZATION |
| Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR | |
| Check for DTCs in the engine immobiliser system. | Refer to DTC CHECK / CLEAR | |
| Check that the Lck/Unlck Rec 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.) | Refer to DATA LIST / ACTIVE TEST | |
| Steering lock ECU power source circuit | Refer to Power Source Circuit | |
| Check the input signal from the IGE terminal of the steering lock ECU. | Refer to Steering Lock Motor Drive Power Circuit | |
| Replace the steering lock ECU. | Refer to REMOVAL | |
| Steering wheel cannot be unlocked (no steering unlock command). | Check that the S Code Chk 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 Chk 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). | Refer to REMOVAL | |
| Steering wheel cannot be locked. | Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR |
| Check for DTCs in the engine immobiliser system. | Refer to DTC CHECK / CLEAR | |
| 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 (smart key ECU assembly) displays YES within 10 seconds. (If it displays NO, see "No steering lock" command in this table.) | Refer to DATA LIST / ACTIVE TEST | |
| Steering lock ECU power source circuit | Refer to Power Source Circuit | |
| Check the input signal from the IGE terminal of the steering lock ECU. | Refer to Steering Lock Motor Drive Power Circuit | |
| Replace the steering lock ECU. | Refer to REMOVAL | |
| Steering wheel cannot be locked (no steering lock command). | Courtesy light switch circuit | Refer to Door Courtesy Switch Circuit |
| Check that the S Code Chk 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 Chk 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). | Refer to REMOVAL |
SMART KEY SYSTEM FUNCTION:
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not start. | Initialization | Refer to INITIALIZATION |
| Check for DTCs in the smart key system. | Refer to DTC CHECK / CLEAR | |
| Check for DTCs in the engine immobiliser system. | Refer to DTC CHECK / CLEAR | |
| 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 Shift P Sig 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 function table.) | - | |
| Steering lock ECU power source circuit | - | |
| 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 ST SW of the certification ECU (smart key ECU assembly) (DTC B2275). | Refer to DTC B2275: STSW Monitor Malfunction | |
| Replace the main body ECU. | - | |
| Engine does not start due to the engine immobiliser. | Check that the L Code Chk 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 Start Rqst 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 Chk 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). | Refer to REMOVAL |