Steering Lock (Diagnostic Codes & Circuit Tests): Other Lexus ES XV40 facelift

PROCEDURE

1. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) HINT: The steering lock ECU and steering lock actuator assembly are supplied as a unit. Replace the steering lock actuator assembly. Refer to «DISASSEMBLY»(ref-396690-S30089134182011050900000) . NEXT --> END

1. CHECK VEHICLE CONDITION Check the problem symptom of the steering lock system. Result Condition Proceed to Steering lock cannot be released A Steering cannot be locked B B --> See step 6 A: Go to next step
2. READ VALUE USING TECHSTREAM Connect Techstream to the DLC3. Turn the engine switch on (IG). Turn Techstream on. Read the DATA LIST. Enter the following menus: Body / Smart Access / Data List. SMART ACCESS: Tester Display Measurement Item/Range Normal Condition Diagnostic Note Lock/Unlock Receive Steering lock command reception record / YES or NO YES: Steering lock / unlock signal received NO: Steering lock / unlock signal not received - Check if a steering unlock command signal has been received. OK "YES" is displayed on the tester display. NG --> CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START OK: Go to next step
3. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition E78-3 (IGE) - E78-1 (GND) Engine switch off Engine switch on (ACC or IG) Motor activated: Below 1 V Motor not activated: 10 to 12 V OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go to next step
4. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND) Disconnect the E78 connector from the steering lock actuator assembly. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E78-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU) Disconnect the E61 connector from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E78-3 (IGE) - E61-19 (SLR+) Always Below 1 ohms E78-3 (IGE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU
6. INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Condition Specified Condition E78-3 (IGE) - E78-1 (GND) The specified condition should be checked after performing the following: Move the shift lever to the P position Turn the engine switch off Open the driver's door Motor activated: Below 1 V Motor not activated: 10 to 12 V OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go to next step
7. CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - MAIN BODY ECU) Disconnect the E78 connector from the steering lock actuator assembly. Disconnect the E61 connector from the main body ECU. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Condition Specified Condition E78-3 (IGE) - E61-19 (SLR+) Always Below 1 ohms E78-3 (IGE) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MAIN BODY ECU