Steering Lock System (Diagnostics - Introduction): Diagnosis Toyota 4Runner V

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedures to troubleshoot the steering lock system.
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. NEXT: Go to next step
3. CHECK DTC* Check for DTCs and make a note of any codes that are output. Refer to «DTC CHECK / CLEAR»(ref-422208-S06618337002011092600000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-422208-S06618337002011092600000) . Recheck for DTCs. Refer to «DTC CHECK / CLEAR»(ref-422208-S06618337002011092600000) . Based on the DTCs output above, try to cause the output of the same wireless door lock control system DTC, LIN communication system DTC, steering lock system DTC, engine immobilizer system DTC or smart key system (for entry function) DTC by reproducing the symptoms indicated by the DTC. RESULT Result Proceed to DTC is not output. A Wireless door lock control system DTC is output. B LIN communication system DTC is output. C Steering lock system DTC is output. D Engine immobiliser system DTC is output. E Smart key system (for entry function) DTC is output. F B --> Go to WIRELESS DOOR LOCK CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422209-S32038701442011092600000) C --> Go to LIN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422210-S38973994682011092600000) D --> Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422208-S14115680932011092600000) E --> Go to ENGINE IMMOBILIZER SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-421960-S41467228252011092600000) F --> Go to SMART KEY SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-422211-S39764320492011092600000) A: Go to next step
4. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-422208-S24606243802011092600000) . 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 6 A: Go to next step
5. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-422208-S04245912442011092600000) . Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-422208-S03408662362011092600000) . NEXT: Go to next step
6. REPAIR OR REPLACE NEXT: Go to next step
7. 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 SYSTEM

Scheme 35

1. CHECK STEERING LOCK ECU Disconnect the F68 steering lock ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F68-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms F68-6 (IG2) - F68-1 (GND) W - W-B IG2 signal input Engine switch off --> engine switch on (IG) Below 1 V --> 11 to 14 V F68-7 (B) - F68-1 (GND) GR - W-B Power source Always 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the F68 steering lock ECU connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F68-3 (IGE) - F68-1 (GND) GR - W-B Power source for motor drive When all conditions are met: Steering lock unlocked Engine switch off Shift lever in P Driver side door closed --> opened 11 to 14 V (Steering lock motor not operating) --> Below 1 V (Steering lock motor operating) --> 11 to 14 V (Steering lock motor not operating) F68-4 (SLP1) - F68-1 (GND) SB - W-B Unlock position sensor output signal Steering lock locked --> steering lock unlocked 11 to 14 V --> Below 1.2 V If the result is not as specified, there may be a malfunction in the steering lock ECU.

DIAGNOSIS SYSTEM

1. DESCRIPTION When troubleshooting a vehicle with a diagnosis system, connect the Techstream to the DLC3 of the vehicle and read various data output from the steering lock actuator assembly (steering lock ECU). The steering lock actuator assembly (steering lock ECU) stores DTCs when the ECU detects a malfunction in itself or in its circuits. The diagnosis information of the steering lock actuator assembly (steering lock ECU) is transmitted to the Techstream via the certification ECU as the steering lock actuator assembly (steering lock ECU) is not connected to the CAN communication system. The steering lock actuator assembly (steering lock ECU) does not store DTCs regarding past problems. When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Communication with the Techstream is not possible if the main body ECU is in sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU: With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals. As the steering lock actuator assembly (steering lock ECU) memory data is cleared, do not remove the fuses or disconnect the cable from the battery terminals until the DTCs are checked and noted. Malfunctions related to systems other than the steering lock actuator assembly (steering lock ECU) system may cause DTCs to be output. Note any DTCs related to other systems.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. Check for DTCs.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Key / Trouble Codes. Clear the DTCs.

DATA LIST / ACTIVE TEST

1. READ 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 / (desired system) / Data List. According to the display on the Techstream, read the Data List. SMART KEY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ignition Switch Engine switch status/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - #Codes Number of diagnostic trouble codes/0 to 255 - - Steering Lock Sleep Cond Steering lock ECU sleep mode possible/Yes or No Yes: Sleep mode possible No: Sleep mode not possible - Steering Lock Start Cond Steering lock ECU wake up signal sent/Yes or No Yes: Wake up signal sent No: Wake up signal not sent - Engine Start Condition Engine start status/OK or NG NG: Engine start not possible OK: Engine start possible - Sensor Value Sensor malfunction record/NG (PAST) or OK NG (PAST): Sensor malfunction OK: No malfunction - Power Supply Short Short in ECU record/NG (PAST) or OK NG (PAST): Short in ECU OK: No malfunction - Power Supply Open Open in ECU record/NG (PAST) or OK NG (PAST): Open in ECU OK: No malfunction - Motor Driver Short Short in driver ECU record/NG (PAST) or OK NG (PAST): Short in driver ECU OK: No malfunction If NG (PAST) is displayed, proceed to troubleshooting for DTC B2782. Motor Driver Open Open in driver ECU record/NG (PAST) or OK NG (PAST): Open in driver ECU OK: No malfunction If NG (PAST) is displayed, proceed to troubleshooting for DTC B2782. Lock/Unlock Receive Steering lock command reception record/YES or NO YES: Steering lock/unlock signal received NO: Steering lock/unlock signal not received - Lock Bar Stuck Error Lock bar stuck malfunction record/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 status/ON or OFF ON: 11 to 14 V OFF: Below 1 V - IG(Lin) IG signal via LIN communication/ON or OFF ON: IG signal sent via LIN communication OFF: IG signal not sent via LIN communication - S Code Check S code certification result/NG or OK NG: S code certification result abnormal OK: S code certification result normal - L Code Check L code certification result/NG or OK NG: L code certification result abnormal OK: L code certification result normal - Unlock Request Receive Steering lock unlock command reception status/NG or OK NG: Unlock request not received OK: Unlock request received - Lock Request Receive Steering lock command reception status/NG or OK NG: Lock request not received OK: Lock request received - S Code Check(Past) S code certification result/NG (PAST) or OK NG (PAST): S code certification result abnormal OK: S code certification result normal - L Code Check(Past) L code certification result/NG (PAST) or OK NG (PAST): L code certification result abnormal OK: L code certification result normal - MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note FL Door Courtesy Front door courtesy switch LH/ON or OFF ON: Front door courtesy switch LH on OFF: Front door courtesy switch LH off
2. PERFORM 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. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Active Test. According to the display on the Techstream, perform the Active Test. POWER SOURCE CONTROL Tester Display Test Part Control Range Diagnostic Note P Supply for Steering Lock Power management control ECU Supply or Stop This test supplies or stops power to the steering lock motor.

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See" below.

STEERING LOCK SYSTEM