Steering Lock System (Diagnostics - Introduction): Diagnosis Toyota Venza I

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Perform troubleshooting in accordance with the following flowchart.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. 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
3. CHECK AND CLEAR DTCs* NEXT: Go to next step
4. 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
5. SYMPTOM SIMULATION NEXT: Go to next step
6. CHECK CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-394831-S01577403612011040800000) . Result Result Proceed to CAN communication DTC is not output. A CAN communication DTC is output. B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394831-S03529278992011040800000) A: Go to next step
7. CHECK LIN COMMUNICATION SYSTEM* Use the Techstream to check if the LIN communication system is functioning normally. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-394859-S32846538212011040800000) . Result Result Proceed to LIN Communication DTC is not output. A LIN Communication DTC is output. B B --> GO TO LIN COMMUNICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394859-S19183860122011040800000) A: Go to next step
8. DTC CHECK* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-394617-S40957147162011040800000) . Result Result Proceed to DTC is output. A DTC is not output. B A --> GO TO STEP 9 B: Go to next step
9. 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 11 A: Go to next step
10. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-394617-S28763203032011040800000) . Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-394617-S41424795012011040800000) . NEXT: Go to next step
11. REPAIR OR REPLACEMENT NEXT: Go to next step
12. CONFIRMATION TEST* NEXT --> END

PROBLEM SYMPTOMS TABLE

HINT

1. 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.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

STEERING LOCK FUNCTION

PUSH-BUTTON START FUNCTION

Scheme 54

1. STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition D17-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 V D17-3 (IGE) - D17-1 (GND) R - W-B Power source for driving motor Motor is in operating Motor is not in operating Below 1 V 10 to 12 V D17-4 (SLP1) - D17-1 (GND) V - W-B Unlock position sensor output signal Steering is locked Steering lock is released 10 to 14 V Below 1 V D17-5 (LIN) - D17-1 (GND) L - W-B LIN communication bus Engine switch on (IG) Pulse generation D17-6 (IG2) - D17-1 (GND) LG - W-B IG signal input Engine switch on (IG) 10 to 14 V D17-7 (B) - D17-1 (GND) P - W-B Power source Always 10 to 14 V

Scheme 55

1. 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 steering lock ECU (steering lock actuator assembly). The steering lock ECU (steering lock actuator assembly) records DTCs when the computer detects a malfunction in the computer itself or in its 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 diagnosis information of the steering lock ECU (steering lock actuator assembly) is transmitted to the Techstream via the certification ECU (smart key ECU assembly) as the steering lock ECU (steering lock actuator assembly) is not connected to CAN. Check the DLC3. Check the DLC3. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-394610-S07332439272011040800000) .
2. WARNING FUNCTION OF ENGINE SWITCH INDICATOR The steering lock ECU (steering lock actuator assembly) blinks the LED indicator of the engine switch when any of the following problems occurs in the system: TEXT IN ILLUSTRATION *1 Indicator Light Detection Item Indicator Light Blink Pattern Indication Status Countermeasure Steering lock is still not released Blinks green at 1-second intervals Goes off 30 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 push-button start 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 (steering lock actuator assembly) or power management control ECU. Troubleshoot by following "How to Proceed with Troubleshooting". Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-394617-S20691439652011040800000) .

DTC CHECK / CLEAR

1. CHECK DTCS Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Check for DTCs. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. Confirm the details of the DTCs. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-394617-S22627142192011040800000) .
2. CLEAR DTCS Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. According to the display on the Techstream, select the trouble code data display with the clear button.

DATA LIST / ACTIVE TEST

1. 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 Steering Lock Sleep Cond Steering lock ECU (steering lock actuator assembly) sleep condition / Yes or No Yes: Steering lock ECU (steering lock actuator assembly) sleep mode can be entered No: Steering lock ECU (steering lock actuator assembly) sleep mode cannot be entered - Steering Lock Start Cond Steering lock ECU (steering lock actuator assembly) start signal / Yes or No Yes: Steering lock ECU (steering lock actuator assembly) sent a start signal No: Steering lock ECU (steering lock actuator assembly) did not send a start signal - Engine Start Condition 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 - Power Supply Short Short in ECU / NG (Past) or OK NG (Past): Short in ECU OK: No malfunction - Power Supply Open Open in ECU / NG (Past) or OK NG (Past): Open in ECU OK: No malfunction - Motor Driver Short Short in driver ECU / NG (Past) or OK NG (Past): Short in driver ECU OK: No malfunction - Motor Driver Open Open in driver ECU / NG (Past) or OK NG (Past): Open in driver ECU OK: No malfunction - Lock/Unlock Receive Steering lock command reception record / Yes or No Yes: Steering lock/unlock signal received No: Steering lock/unlock signal no received - Lock Bar Stuck Error Lock bar stuck malfunction / NG (Past) or OK NG (Past): Lock bar stuck malfunction OK: No malfunction - Push Start Error Push-button start function malfunction / NG (Past) or OK NG (Past): Malfunction in push-button start OK: No malfunction - IG2 Status IG2 voltage / ON or OFF ON: 10 to 14 V OFF: Below 1 V - IG(Lin) LIN bus start-up status / ON or OFF ON: LIN bus started-up OFF: LIN bus not started-up - Steering Lock Steering lock condition / Set or Unset Set: Steering lock is set Unset: Steering lock is not set This status changes depending on the state of various sensors Steering Unlock Steering unlock condition / Set or Unset Set: Steering unlock is set Unset: Steering unlock is not set This status changes depending on the state of various sensors

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 service information.

HINT

The steering lock ECU does not store DTCs regarding the past problems.

STEERING LOCK SYSTEM