Steering Lock System (Diagnostics - Introduction): Diagnosis Toyota RAV4 IV

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 FOR DTC* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-493498-S07193824532012081000000) . RESULT Result Proceed to DTC is output A DTC is not output B A --> Go to step 6 B: Go to next step
4. PROBLEM SYMPTOMS TABLE Refer to the Problem Symptoms Table.Refer to «PROBLEM SYMPTOMS TABLE»(ref-493498-S30357514632012081000000) . 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-493498-S09351638422012081000000) . Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-493498-S01535555152012081000000) . 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 44

1. CHECK STEERING LOCK ECU Disconnect the E77 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 E77-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms E77-2 (SGND) - Body ground BR - Body ground Signal ground Always Below 1 ohms E77-6 (IG2) - E77-1 (GND) B - W-B IG signal input Engine switch on (IG) 11 to 14 V E77-7 (B) - E77-1 (GND) L - 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 E77 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 E77-3 (IGE) - E77-1 (GND) Y - W-B Power source for motor drive Motor operating Below 1 V E77-3 (IGE) - E77-1 (GND) Y - W-B Power source for motor drive Motor not operating 11 to 14 V E77-4 (SLP1) - E77-2 (SGND) G - BR Unlock position sensor output signal Steering lock locked 11 to 14 V E77-4 (SLP1) - E77-2 (SGND) G - BR Unlock position sensor output signal Steering lock unlocked Below 1 V E77-5 (LIN) - E77-2 (SGND) V - BR LIN communication bus Engine switch on (IG) Pulse generation If the result is not as specified, the ECU may have a malfunction.

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 ECU. The steering lock ECU stores DTCs when the ECU detects a malfunction in itself or in its circuits. The diagnosis information of the steering lock ECU is transmitted to the Techstream via the certification ECU as the steering lock ECU is not connected to the CAN communication system. The steering lock ECU does not store DTCs regarding past problems. HINT: When the engine switch is off, the main body ECU to which the Techstream is connected may be malfunctioning or in sleep mode. Communication with the Techstream is not possible if the main body ECU is not operating. As the steering lock ECU memory data will be cleared, do not remove the fuses or disconnect the battery terminals until the DTCs are checked and noted. Malfunctions related to systems other than the steering lock ECU system may cause DTCs to be output. Note any DTCs related to other systems.

DTC CHECK / CLEAR

1. CHECK FOR 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. 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 #Codes Number of diagnostic trouble codes/0 to 255 - - 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 not 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 function OK: No malfunction - IG2 Status IG2 voltage/ON or OFF ON: 11 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 - S Code Check S code match record/NG or OK NG: S code not matched OK: S code matched - L Code Check L code match record/NG or OK NG: L code not matched OK: L code matched - 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 lock command reception status/NG or OK NG: Lock request not received OK: Lock request received - S Code Check(Past) S code match record/NG(Past) or OK NG(Past): S code not matched OK: S code matched - L Code Check(Past) L code match record/NG(Past) or OK NG(Past): L code not matched OK: L code matched - Steering Lock Steering lock condition/Set or Unset Set: Steering lock set Unset: Steering lock not set This status changes depending on the state of various sensors. Steering Unlock Steering unlock condition/Set or Unset Set: Steering lock not set Unset: Steering lock set This status changes depending on the state of various sensors.

DIAGNOSTIC TROUBLE CODE CHART

STEERING LOCK SYSTEM