Variable Gear Ratio Steering System (Diagnostic Codes & Symptom Tests): Other Lexus GS III рестайлинг

PROCEDURE

1. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . 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-386975-S06876666312011022400000) . NEXT: Go to next step
3. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . Result Result Proceed to DTC is not output. A DTC C1592/52 is output. B DTC C1593/53 is output. C C --> See step 5 B --> See next step A --> END
4. GO TO DTC C1592/52. Refer to «DTC C1592/52: Actuator Neutral Position Calibration Incomplete»(ref-387143-S14969643322011022400000)
5. GO TO DTC C1593/53. Refer to «DTC C1593/53: Actuator Standard Position Malfunction»(ref-387143-S09859830862011022400000)

1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . NEXT: Go to next step
2. PERFORM VGRS SYSTEM CALIBRATION Perform VGRS system calibration. Refer to «CALIBRATION»(ref-386975-S06876666312011022400000) . NEXT: Go to next step
3. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . Result Result Proceed to DTCs is not output A C15B2/72 is output B C1592/52 is output after VGRS system calibration has been performed less than 3 times C 1592/52 is output after VGRS system calibration has been performed 3 times or more D D --> REPLACE STEERING ACTUATOR C --> See step 1 B --> REPLACE STEERING CONTROL ECU A --> END

1. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . Result Result Proceed to C1593/53 is not output OK C1593/53 is output NG NG --> REPLACE STEERING ACTUATOR OK --> END

1. REPLACE STEERING ACTUATOR NEXT --> END

1. REPLACE STEERING CONTROL ECU NEXT --> END

1. CHECK MASTER WARNING LIGHT Check the conditions under which the master warning light comes on. Result The engine stalled, battery voltage is too low, or the steering control ECU connector is disconnected. NG --> REPLACE STEERING CONTROL ECU OK: Go to next step
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the power switch ON (IG) and turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . NEXT: Go to next step
3. PERFORM VGRS SYSTEM CALIBRATION Perform VGRS system calibration. Refer to «CALIBRATION»(ref-386975-S06876666312011022400000) . NEXT: Go to next step
4. CHECK DTC Turn the power switch ON (IG). Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . Result Result proceed to DTCs is not output OK C15B4/71 is output NG NG --> REPLACE STEERING CONTROL ECU OK --> END

1. CHECK DTC Check for DTCs in the skid control ECU. Refer to «DTC CHECK / CLEAR»(ref-386974-S03953297302011022400000) . Result Result Proceed to DTCs is not output OK DTCs is output NG NG --> REPAIR CIRCUIT INDICATED BY DTC OUTPUT OK: Go to next step
2. CHECK DTC Check for DTCs in the CAN communication system. Refer to «DIAGNOSIS SYSTEM»(ref-387091-S28049162972011022400000) . Result Result Proceed to DTC is not output A DTC is output B B --> REPAIR CIRCUIT INDICATED BY DTC OUTPUT A --> REPLACE STEERING CONTROL ECU

1. CHECK DTC Check for DTCs in the skid control ECU. Refer to «DTC CHECK / CLEAR»(ref-386974-S03953297302011022400000) . Result Result Proceed to DTCs is not output OK DTCs is output NG NG --> REPAIR CIRCUIT INDICATED BY DTC OUTPUT OK: Go to next step
2. CHECK DTC Check for DTCs in the CAN communication system. Refer to «DIAGNOSIS SYSTEM»(ref-387091-S28049162972011022400000) . Result Result Proceed to DTCs is not output A DTCs is output B B --> REPAIR CIRCUIT INDICATED BY DTC OUTPUT A --> REPLACE STEERING CONTROL ECU

1. CHECK DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000) . Result Result Proceed to DTCs is not output OK DTCs is output NG NG --> See next step OK --> END
2. GO TO THE APPROPRIATE CAN COMMUNICATION SERVICE INFORMATION. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-387091-S07682503522011022400000)

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 the left to the right several times, and then check if the steering wheel is centered. Result Result Proceed to The steering wheel is centered A The steering wheel is off-center B HINT: If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between left and right, or the steering wheel may become off-center. However, this is not a malfunction. A --> VGRS SYSTEM IS NORMAL B: 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 --> ADJUST TIRE AIR PRESSURE TO SPECIFIED VALUE B --> REPLACE WITH SPECIFIED SIZE TIRE A: Go to next step
3. CHECK WHEEL ALIGNMENT Check wheel alignment for the front. Refer to «ADJUSTMENT»(ref-386957-S37344048512011022400000) and rear. Refer to «ADJUSTMENT»(ref-386957-S40713542812011022400000) . 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 left and right when the steering wheel is turned from lock to lock. NG --> PERFORM WHEEL ALIGNMENT ADJUSTMENT OK --> PERFORM STEERING ANGLE ADJUSTMENT AND VGRS SYSTEM CALIBRATION

1. CHECK STEERING WHEEL POSITION Turn the steering wheel from lock to lock at a speed of approximately 90°/sec. Check if the steering wheel angles between left and right. OK The steering wheel is centered. HINT: If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between left and right, or the steering wheel may become off-center. However, this is not a malfunction. OK --> VGRS SYSTEM IS NORMAL NG: Go to next step
2. CHECK STEERING EFFORT Start the engine. Turn the steering wheel. Check the steering effort. OK Below 6.5 N*m (66 kgf*cm, 57 in.*lbf) HINT: After completing the inspection or repair, attempt to simulate the problem and then perform "Data List" again to reconfirm that the problem does not occur. NG --> GO TO THE APPROPRIATE POWER STEERING SERVICE INFORMATION OK: Go to next step
3. CHECK WHEEL ALIGNMENT Check wheel alignment for the front. Refer to «ADJUSTMENT»(ref-386957-S37344048512011022400000) and rear. Refer to «ADJUSTMENT»(ref-386957-S40713542812011022400000) . 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 left and right when the steering wheel is turned from lock to lock. NG --> PERFORM WHEEL ALIGNMENT ADJUSTMENT OK --> PERFORM STEERING GEAR NEUTRAL POSITION CALIBRATION AND STEERING COLUMN NEUTRAL POSITION CALIBRATION

1. CHECK STEERING WHEEL CONDITION Turn the power switch ON (IG). 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 power switch is turned ON (IG) with the connector disconnected from the steering control ECU. Clear the DTC after this check. NG --> REPLACE STEERING ACTUATOR ASSEMBLY OK: Go to next step
2. REPAIR OR REPLACE POWER STEERING SYSTEM Repair or replace the power steering system. Refer to «PROBLEM SYMPTOMS TABLE»(ref-387081-S41877178912011022400000) . NEXT --> See next step
3. CHECK DTC OF VGRS SYSTEM. Refer to «DTC CHECK / CLEAR»(ref-386975-S17151165742011022400000)

1. CHECK BATTERY Measure the battery voltage. Standard voltage 11 to 14 V NG --> REPLACE BATTERY OK: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (COMBINATION METER) Connect the Techstream to the DLC3. Turn the power switch ON (IG). Turn the Techstream on. Perform the Active Test. Enter the following menus: Body Electrical / Combination Meter / Active Test COMBINATION METER Tester Display Test Part Control Range Diagnostic Note Master Warning Master caution indicator light Indicator light / ON or OFF Confirm that the vehicle is stopped and engine idling OK Indicator light turns on / turns off. NG --> REPLACE COMBINATION METER OK: Go to next step
3. CHECK POWER STEERING SYSTEM Check for DTCs in the power steering system. Refer to «DTC CHECK / CLEAR»(ref-387136-S25177557262011022400000) . Result Result Proceed to DTCs is not output OK DTCs is output NG NG --> GO TO THE APPROPRIATE POWER STEERING SERVICE INFORMATION OK --> REPLACE STEERING CONTROL ECU