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Variable Gear Ratio Steering (Diagnostic Codes & Symptom Tests): Other Lexus LX J200

Electronic Steering ~1455 words

PROCEDURE

  1. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . OK DTC C1591/51 only is output. NG --> REPAIR CIRCUIT INDICATED BY DTC OUTPUT OK: Go to next step
  2. PERFORM VGRS SYSTEM CALIBRATION Perform VGRS system calibration. Refer to «CALIBRATION»(ref-385244-S03519815142011021400000) . NEXT: Go to next step
  3. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . RESULT Result Proceed to DTC is not output. A DTC C1592/52 is output. B DTC C1593/53 is output. C C --> See step 6 B --> See step 5 A --> See step 4
  4. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385196-S09917434812011021400000)
  5. GO TO DTC C1592/52. Refer to «DTC C1592/52: Actuator Neutral Position Calibration Incomplete»(ref-385253-S15891234682011021400000)
  6. GO TO DTC C1593/53. Refer to «DTC C1593/53: Actuator Standard Position Malfunction»(ref-385253-S09364902122011021400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . NEXT: Go to next step
  2. PERFORM VGRS SYSTEM CALIBRATION Perform VGRS system calibration. Refer to «CALIBRATION»(ref-385244-S03519815142011021400000) . NEXT: Go to next step
  3. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . RESULT Result Proceed to C1592/52 is output after VGRS system calibration has been performed 3 times or more A C15B2/72 is output B DTC is not output C NOTE: If DTC C1592/52 is output even though the VGRS system calibration has been performed, confirm the procedure again, and perform the VGRS system calibration 3 times or more. C --> END B --> See step 4 A --> See step 5
  4. REPLACE STEERING CONTROL ECU. Refer to «REMOVAL»(ref-385254-S25865253242011021400000)
  5. REPLACE STEERING ACTUATOR ASSEMBLY. Refer to «REMOVAL»(ref-385254-S28279630502011021400000)
  1. CHECK DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . Recheck for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . RESULT Result Proceed to C1593/53 is not output OK C1593/53 is output NG NG --> See step 3 OK --> See step 2
  2. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385196-S09917434812011021400000)
  3. REPLACE STEERING ACTUATOR ASSEMBLY. Refer to «REMOVAL»(ref-385254-S28279630502011021400000)
  1. REPLACE STEERING ACTUATOR ASSEMBLY Replace steering actuator assembly. Refer to «REMOVAL»(ref-385254-S28279630502011021400000) . NOTE: Before replacing the steering actuator assembly, make sure to use the Techstream Data List to confirm and record the "Elec Angle Position" value. Refer to «DATA LIST / ACTIVE TEST»(ref-385244-S00215279042011021400000) . NEXT --> END
  1. REPLACE STEERING CONTROL ECU Replace the steering control ECU. Refer to «REMOVAL»(ref-385254-S25865253242011021400000) . NEXT --> END
  1. CHECK MASTER WARNING LIGHT Check the conditions under which the master warning light comes on. RESULT Result Proceed to The engine stalled, battery voltage is too low, or the steering control ECU connector is disconnected. A Conditions other than above. B B --> See step 6 A: Go to next step
  2. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . NEXT: Go to next step
  3. PERFORM VGRS SYSTEM CALIBRATION Perform VGRS system calibration. Refer to «CALIBRATION»(ref-385244-S03519815142011021400000) . NEXT: Go to next step
  4. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-385244-S06342001682011021400000) . RESULT Result Proceed to DTC is not output A C15B4/71 is output B B --> See step 6 A --> See step 5
  5. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385196-S09917434812011021400000)
  6. REPLACE STEERING CONTROL ECU. Refer to «REMOVAL»(ref-385254-S25865253242011021400000)
  1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM) Check for DTCs in the vehicle stability control system. Refer to «DTC CHECK / CLEAR»(ref-385226-S17305943052011021400000) . RESULT Result Proceed to DTC is not output OK DTC is output NG NG --> See step 4 OK: Go to next step
  2. CHECK DTC (CAN COMMUNICATION SYSTEM) Using the Techstream, check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM»(ref-385222-S33412669092011021400000) . RESULT Result Proceed to DTC is not output A DTC is output B B --> See step 5 A --> See step 3
  3. REPLACE STEERING CONTROL ECU. Refer to «REMOVAL»(ref-385254-S25865253242011021400000)
  4. GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-385226-S23998773362011021400000)
  5. GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-385222-S04985080032011021400000)
  1. CHECK DTC Using the Techstream, check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM»(ref-385222-S33412669092011021400000) . RESULT Result Proceed to DTC is not output A DTC is output B B --> See step 3 A --> See step 2
  2. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385196-S09917434812011021400000)
  3. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385222-S11207754182011021400000)
  1. CHECK DRIVE VEHICLE Drive the vehicle straight at 35 km/h (22 mph) or more for 5 seconds or more. Turn the steering wheel slowly from left to right several times, and then check if the steering wheel is centered. RESULT Result Proceed to The steering wheel is off-center A The steering wheel is centered B HINT: If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between the left and right, or the steering wheel may become off-center. However, this is not a malfunction. B --> VGRS SYSTEM IS NORMAL A: Go to next step
  2. CHECK TIRE SIZE Check all the tires. RESULT Result Proceed to All tire sizes are correct and tire pressures are normal A The size of any of the tires is incorrect B All tire sizes are correct, but tire pressures are incorrect C C --> See step 5 B --> See step 4 A: Go to next step
  3. CHECK WHEEL ALIGNMENT Check wheel alignment for the front. Refer to «ADJUSTMENT»(ref-385239-S32569116912011021400000) . OK The wheel alignment is normal. HINT: Adjust the tie-rod ends within the specified values so that the tire angles are the same between the left and right when the steering wheel is turned from lock to lock. NG --> See step 6 OK --> PERFORM STEERING ANGLE ADJUSTMENT AND VGRS SYSTEM CALIBRATION
  4. REPLACE WITH SPECIFIED SIZE TIRE. Refer to «INSPECTION»(ref-385193-S42090166502011021400000)
  5. ADJUST TIRE AIR PRESSURE TO SPECIFIED VALUE. Refer to «INSPECTION»(ref-385193-S42090166502011021400000)
  6. PERFORM WHEEL ALIGNMENT ADJUSTMENT. Refer to «ADJUSTMENT»(ref-385239-S32569116912011021400000)
  1. CHECK STEERING WHEEL POSITION Turn the steering wheel from lock to lock at a speed of approximately 90°/sec. Check the steering wheel angles between the left and right. RESULT Result Proceed to The steering wheel is off-center A The steering wheel is centered B HINT: If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between the left and right, or the steering wheel may become off-center. However, this is not a malfunction. B --> VGRS SYSTEM IS NORMAL A: Go to next step
  2. CHECK STEERING EFFORT Start the engine. Turn the steering wheel. Measure the steering effort. Standard steering effort Below 6.9 N*m (70 kgf*cm, 61 in.*lbf) HINT: After completing the inspection or repair, attempt to simulate the problem and then read the Data List again to confirm that the problem does not occur. NG --> See step 4 OK: Go to next step
  3. CHECK WHEEL ALIGNMENT Check wheel alignment for the front. Refer to «ADJUSTMENT»(ref-385239-S32569116912011021400000) . OK The wheel alignment is normal. HINT: Adjust the tie-rod ends within the specified values so that the tire angles are the same between the left and right when the steering wheel is turned from lock to lock. NG --> See step 5 OK --> PERFORM STEERING GEAR NEUTRAL POSITION CALIBRATION AND STEERING COLUMN NEUTRAL POSITION CALIBRATION
  4. GO TO POWER STEERING SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to «PROBLEM SYMPTOMS TABLE»(ref-385176-S37199500682011021400000)
  5. PERFORM WHEEL ALIGNMENT ADJUSTMENT. Refer to «ADJUSTMENT»(ref-385239-S32569116912011021400000)
  1. CHECK STEERING WHEEL CONDITION Center the steering wheel. Turn the engine switch off. Disconnect the steering actuator connector. Start the engine. Check for abnormal noise or vibration while turning the steering wheel. OK No abnormal noise or vibration. NOTE: DTC C15A5/65 is stored when the engine is running with the connector disconnected from the steering actuator. Clear the DTC after this check. NG --> See step 3 OK --> See step 2
  2. REPLACE STEERING ACTUATOR ASSEMBLY. Refer to «REMOVAL»(ref-385254-S28279630502011021400000)
  3. REPAIR OR REPLACE STEERING COLUMN ASSEMBLY. Refer to «REMOVAL»(ref-385234-S25887146252011021400000)
  1. CHECK BATTERY Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition Positive (+) battery terminal - negative (-) battery terminal Always 11 to 14 V NG --> RECHARGE OR REPLACE BATTERY OK: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER) Select the Active Test, use the Techstream to generate a control command, and then check that the master warning light turns on/off. COMBINATION METER: Tester Display Test Part Control Range Diagnostic Note Master Warning Master warning light OFF/ON Confirm that the vehicle is stopped and the engine is running OK Indicator light turns on/off. NG --> See step 3 OK --> See step 4
  3. GO TO METER/GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-385224-S10829126522011021400000)
  4. REPLACE STEERING CONTROL ECU. Refer to «REMOVAL»(ref-385254-S25865253242011021400000)

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