HOW TO PROCEED WITH TROUBLESHOOTING
HINT
- Perform troubleshooting in accordance with the following flowchart.
- *: Use the Techstream.
- VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
- INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. NEXT: Go to next step
- CHECK AND CLEAR DTCs* NEXT: Go to next step
- PROBLEM SYMPTOM CONFIRMATION Result Result Proceed to Symptom does not occur. A Symptom occurs. B B --> Go to step 6 A: Go to next step
- SYMPTOM SIMULATION NEXT: Go to next step
- CHECK CAN COMMUNICATION SYSTEM* HINT: Check that there are no problems in the CAN communication system before troubleshooting of the steering lock system. NEXT: Go to next step
- DTC CHECK* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-425886-S35578537062011101200000) . Result Result Proceed to DTC is output. A DTC is not output. B A --> Go to step 9 B: Go to next step
- PROBLEM SYMPTOMS TABLE Result Result Proceed to Fault is not listed in problem symptoms table. A Fault is listed in problem symptoms table. B B --> Go to step 10 A: Go to next step
- DTC CHART NEXT: Go to next step
- CIRCUIT INSPECTION* NEXT: Go to next step
- PROBLEM IDENTIFICATION NEXT: Go to next step
- REPAIR OR REPLACEMENT NEXT: Go to next step
- CONFIRMATION TEST* NEXT --> END
PROBLEM SYMPTOMS TABLE
HINT
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed in order of probability in the 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.
- Inspect the fuses and relays related the this system before inspecting the suspected areas below.
| 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. (for Start Function) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| Check for DTCs in the engine immobilizer system. (for w/ smart key system) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| 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.) | 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 displays OK. (If it displays NG, replace the ID code box.) | |
| Check that the L Code Chk item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | ||
| Replace the certification ECU. | ||
| Check for DTCs in the smart key system. (for Start Function) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| Check for DTCs in the engine immobilizer system. (for w/ smart key system) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| 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.) | 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 displays OK. (If it displays NG, replace the ID code box.) | ||
| Check that the L Code Chk item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | ||
| Replace the certification ECU. |
STEERING LOCK SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not start. | Initialization | Refer to INITIALIZATION |
| Check for DTCs in the smart key system. (for Start Function) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| Check for DTCs in the engine immobilizer system. (for w/ smart key system) | Refer to DIAGNOSTIC TROUBLE CODE CHART | |
| 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 immobilizer" 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 | Refer to 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 (DTC B2275). | Refer to DTC B2275: STSW Monitor Malfunction | |
| Replace the main body ECU. | ||
| Engine does not start due to the engine immobilizer. | Check that the L Code Chk item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | |
| Check that the Start Rqst item in the Data List of the certification ECU displays YES. (If it displays NO, replace the certification ECU.) | ||
| Check that the S Code Chk item in the Data List of the certification ECU displays OK. (If it displays NG, replace the ID code box.) | ||
| Replace the ID code box. |
SMART KEY SYSTEM
Scheme 65
- STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E39-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 V E39-2 (SGND) - Body ground W-B - Body ground Signal ground Always Below 1 V E39-3 (IGE) - E39-1 (GND) LG - W-B Power source for driving motor Motor is in operation Motor is not in operation Below 1 V 11 to 14 V E39-4 (SLP1) - E39-2 (SGND) BR - W-B Unlock position sensor output signal Steering is locked Steering lock is released 11 to 14 V Below 1 V E39-5 (LIN) - E39-2 (SGND) V - W-B LIN communication bus Engine switch on (IG) Pulse generation E39-6 (IG2) - E39-1 (GND) B - W-B IG signal input Engine switch on (IG) 11 to 14 V E39-7 (B) - E39-1 (GND) L - W-B Power source Always 11 to 14 V
Scheme 66
- DESCRIPTION DIAGNOSTIC SYSTEM When troubleshooting a vehicle with a diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle's steering lock ECU. The steering lock ECU records DTCs when the computer detects a malfunction in the computer itself or in system circuits. To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables the DTCs to be cleared, the indicators to be activated, and the Data List to be checked. The steering lock ECU diagnosis information cannot be read directly from the steering lock ECU by the Techstream. The diagnosis information from the steering lock ECU is transmitted to the Techstream via the certification ECU to the Techstream using the Controller Area Network (CAN).
- CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(ref-425882-S10318762102011101200000) .
- WARNING FUNCTION OF ENGINE SWITCH INDICATOR The steering lock ECU blinks the LED indicator of the engine switch when any of the following problems occurs in the system: Detection Item Indicator Light Blink Pattern Indication Status Countermeasure Steering lock is still not released Blinks green at 1-second intervals Goes off 15 seconds after blinking starts The motor operates to release the steering lock, but the steering lock cannot be released (e.g. the lock bar is stuck in the steering column). Push the engine switch while turning the steering wheel left or right. Malfunction in smart key system Blinks amber at 2-second intervals Goes off 15 seconds after the engine switch is turned off while blinking There is a short in the devices activating the motor. There is a problem in the steering lock ECU or main body ECU. Troubleshoot by following How To Proceed With Troubleshooting. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-425886-S41866019722011101200000) .
- WARNING FUNCTION OF COMBINATION METER The steering lock ECU displays a warning on the combination meter when any of the following problems occurs in the system. Detection Item Display Indication Status Countermeasure Steering lock is still not released "S/T is not Unlocked" Goes off 15 seconds after blinking starts The motor operates to release the steering lock, but the steering lock cannot be released (e.g. the lock bar is stuck in the steering column). Push the engine switch while turning the steering wheel left or right. Malfunction in smart key system "Check S/T Lock" Goes off 15 seconds after the engine switch is turned off while blinking There is a short in the devices activating the motor. There is a problem in the steering lock ECU or main body ECU. Troubleshoot by following How To Proceed With Troubleshooting. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-425886-S41866019722011101200000) .
DTC CHECK / CLEAR
- CHECK DTC Prepare the Techstream. Connect the Techstream to the DLC3 at the lower part of the instrument panel. Turn the engine switch on (IG) and turn the Techstream on. Use the Techstream to check for DTCs, and note or print the result (see Operator's Manual for operating instructions). Confirm the details of the DTCs. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-425886-S06791796772011101200000) .
- CLEAR DTC Operate the Techstream to clear the DTCs (see Operator's Manual for operation instructions).
DATA LIST / ACTIVE TEST
- DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Data List. According to the display on the Techstream, read the Data List. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Slck Sleep Cond Steering lock ECU sleep condition / YES or NO YES: Steering lock ECU sleep mode can be entered NO: Steering lock ECU sleep mode cannot be entered - Slck Start Cond Steering lock ECU start signal / YES or NO YES: Steering lock ECU sent a start signal NO: Steering lock ECU did not send a start signal - Eng Start Cond Engine start condition / OK or NG OK: Engine is allowed to start NG: Engine is not allowed to start - Sensor Value Sensor malfunction / NG (PAST) or OK NG (PAST): Sensor malfunction OK: No malfunction - Pwr Supply Shrt Short in ECU / NG (PAST) or OK NG (PAST): Short in ECU OK: No malfunction - Pwr Supply Open Open in ECU / NG (PAST) or OK NG (PAST): Open in ECU OK: No malfunction - Mtr Driver Shrt Short in driver ECU / NG (PAST) or OK NG (PAST): Short in driver ECU OK: No malfunction - Mtr Driver Open Open in driver ECU / NG (PAST) or OK NG (PAST): Open in driver ECU OK: No malfunction - Lck/Unlck Rec Steering lock command reception record / YES or NO YES: Steering lock/unlock signal received NO: Steering lock/unlock signal no received - Lck Bar Stuck Lock bar stuck malfunction / NG (PAST) or OK NG (PAST): Lock bar stuck malfunction OK: No malfunction - Push Start Err Smart key system function malfunction / NG (PAST) or OK NG (PAST): Malfunction in smart key system OK: No malfunction - IG2 IG2 voltage / ON or OFF ON: 10 to 14 V OFF: Below 1 V - IG (Lin) LIN bus IG status / ON or OFF ON: LIN bus IG ON status OFF: LIN bus IG OFF status
- ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Active Test. According to the display on the Techstream, perform the Active Test. MAIN BODY Tester Display Test Part Control Range Diagnostic Note S Lock Pwr Power supply for steering lock system ON or OFF
DIAGNOSTIC TROUBLE CODE CHART
If a trouble code is displayed during the DTC check, check the parts listed for that code in the table below and proceed to the appropriate information.
HINT
The steering lock ECU does not store DTCs regarding the past problems.
| DTC Code | Detection Item | Trouble Area | See |
|---|---|---|---|
| B2781 | Open / Short in Steering Lock ECU | Steering lock actuator assembly (Steering lock ECU) | Refer to DTC B2781: Open / Short in Steering Lock ECU |
| B2782 | Power Source Control ECU Malfunction | 1. Wire harness 2. Steering lock actuator assembly (Steering lock ECU) 3. Main body ECU | Refer to DTC B2782: Power Source Control ECU Malfunction |
| B2788 | IG2 Signal Malfunction | 1. IG2 relay 2. Wire harness 3. Main body ECU 4. Steering lock actuator assembly (Steering lock ECU) | Refer to DTC B2788: IG2 Signal Malfunction |
STEERING LOCK SYSTEM