Variable Gear Ratio Steering - Diagnosis: Other Lexus LX J100 рестайлинг

PRECAUTION

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1. VGRS SYSTEM DESCRIPTION The VGRS (Variable Gear Ratio Steering) system controls the steering angle in accordance with the vehicle speed. The system is controlled by the VGRS ECU which operates the VGRS actuator mounted on the steering intermediate shaft. The operating angle of the actuator is added to the steering angle of the intermediate shaft in order to vary the turning angle of the front wheels in accordance with the vehicle speed. When the VGRS system is operating normally, the steering wheel can be turned approximately 2.4 turns from lock to lock, with the engine running and the vehicle stopped. When the system detects a fault, the VGRS ECU illuminates the VGRS warning light to inform the driver that the system is not operating. CAUTION: There may be conditions that will cause the steering wheel to be off center. Refer to «INITIALIZATION»(ref-209759-S02677290282005121100000) for further details.
2. DIAGNOSIS SYSTEM Inspect the battery voltage. Battery voltage: 11 to 14 V If voltage is below 11 V, recharge the battery before proceeding. Check the warning light. With the ignition switch ON, the light should illuminate for 2 seconds and then go out. If the light remains on after 2 seconds, check for DTCs. HINT: If the light does not illuminate, proceed to troubleshooting for the VGRS warning light circuit (See «VGRS WARNING LIGHT CIRCUIT»(ref-209759-S32665858822005121100000) ).
3. DTC CHECK (USING SST CHECK WIRE) Checking DTCs using a SST check wire. SST 09843-18040 Using the SST, connect terminals Tc and CG of DLC3. Turn the ignition switch ON. Read and record any DTCs from the VGRS warning light on the combination meter. Refer to the chart c the left for examples of a normal code and codes 1 and 21. HINT: If the VGRS warning light does not blink any DTC codes or the normal code, inspect the warning light circuit. Refer to (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-209759-S41878861032005121100000) ) for DTC information. Clearing the DTCs using the SST check wire. Turn the ignition switch ON. Using the SST, connect terminals TS and CG of DLC3. SST 09843-18040 Disconnect and connect the SST check wire from the CG terminal 4 times or more in 8 seconds. Check that the VGRS warning light blinks a normal code. HINT: If the fault has not been repaired, the code may still be displayed. Turn the ignition switch OFF. Remove the SST check wire from DLC3. Perform the zero point calibration for the deceleration sensor and yaw rate sensor (see «PRE-CHECK»(ref-209755-S25368151462005121100000) ). HINT: When clearing the VGRS codes, the deceleration sensor and yaw rate sensor memory is also cleared. Therefore it is necessary to complete the zero point calibration (see «PRE-CHECK»(ref-209755-S25368151462005121100000) ).
4. DTC CHECK (USING HAND-HELD TESTER) Checking DTCs using the Hand-held tester. Connect the hand-held tester to DLC3. Turn the ignition switch ON. Read the DTCs following the prompts on the tester screen. HINT: Refer to the hand-held tester operator manual for further details. Clearing the DTCs using the hand-held tester. Connect the hand-held tester to DLC3. Turn the ignition switch ON. Erase the DTCs following the prompts on the tester screen. HINT: Refer to the hand-held tester operator manual for further details.
5. DATA LIST With the hand-held tester connected to DLC3 and the ignition turned ON, the VGRS data list can be displayed. Follow the prompts on the tester screen to access the Data List.
6. FREEZE FRAME DATA The VGRS ECU stores memorized data when a trouble code is set and can be viewed using the hand-held tester.
7. VGRS SENSOR SIGNAL CHECK (TEST MODE) HINT: Before entering Test Mode, check and repair any cure, VGRS DTCs. When entering test mode, the 4 sensor check DTCs are recorded at once. When the ECU judges the sensor normal during the test procedure, the DTC will be eliminated. Procedure for Sensor Test Mode using a SST check wire. SST 09843-18040 Make sure the ignition switch is OFF. Using the SST check wire, connect terminals TS and CG of DLC3. Turn the ignition switch ON. Check that the VGRS warning light is blinking. HINT: If the VGRS warning light does not blink, inspect the warning light or TS terminal circuits. TC TERMINAL CIRCUIT Trouble Area Go To Tc terminal circuit «TS and CG Terminal Circuit»(ref-209759-S00205390712005121100000) VGRS warning light circuit «VGRS Warning Light Circuit»(ref-209759-S32665858822005121100000) Start the engine. Turn the steering wheel lock to lock. NOTE: Check for any unusual feeling in the steering wheel operation. Slowly turn the steering wheel from lock to lock, check that it rotates approximately 2.4 turns. HINT: The warning light display has no change. If the actuator moving amount is correctly checked, the diagnostic codes C1575/75 and C1576/76 in the test mode are cleared. Drive the vehicle at more than 10 km/h (6 mph) for 15 to 30 seconds. HINT: If the vehicle speed sensor is correctly checked, the diagnostic codes C1571/71 and C1572/72 in the test mode are cleared. Stop the vehicle. Leave the engine running. Using the SST check wire, connect the 3rd terminal of the SST check wire to terminal Tc of DLC3. SST 09843-18040 Read the number of blinks of the VGRS warning light. (Refer to the (Scheme 95) chart below) HINT: If all wheel speed sensors are normal, the normal blinking code is output. (A repeating cycle of 0.25 sec. ON and 0.25 sec. OFF) If 2 or more faults are detected at the same time, the lowest number will be displayed first. After completing the check, disconnect the SST from DLC3 and turn the ignition OFF. Procedure for Sensor Test Mode using the hand-held tester. Connect the hand-held tester. Turn the ignition switch ON. Complete the VGRS Test Mode following the prompts on the tester screen. HINT: Refer to the hand-held tester operator manual for further details. Read the DTCs. After completing the test, disconnect the tester and turn the ignition switch OFF. DTC of VGRS sensor check function

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1. STEERING ANGLE SENSOR INITIALIZATION Turn the ignition switch to the "ON" position and check that the VGRS and VSC/TRAC warning lights illuminate for a few seconds. NOTE: If the warning lights remain on or blink, repair the applicable system.
2. Drive the vehicle on a straight road at 35 km/h (22 mph) or more for 5 seconds or longer. At this point, the steering wheel will still remain off- center by 5 to 10 degrees. HINT: In this step, the neutral position of the steering wheel is restored from the VGRS ECU memory.
3. After performing normal cornering 2 to 3 times, the steering wheel position is automatically corrected. NOTE: If the steering wheel remains off-center after the above procedure, repair the applicable system.
4. Confirm the steering angle sensor initialization is completed. WHEN USING HAND-HELD TESTER: Use this procedure to center the steering wheel when the STRAIGHT ANG FLG from the VGRS DATA LIST reads VALID. WHEN NOT USING HAND-HELD TESTER: Drive the vehicle on a road at 60 km/h (37 mph) or more for 30 seconds or longer. HINT: At this time, if steering angle initialization is not completed, VGRS system is stopped. Stop the vehicle. (Engine running) Slowly turn the steering wheel from lock to lock. HINT: 2 seconds or more for 1 turn. If it rotates approximately 2.4 turns, the steering angle sensor initialization is completed. If it rotates approximately 3.5 turns, the steering angle sensor initialization is not completed.

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1. VGRS SYSTEM CALIBRATION PROCEDURE (USING SST CHECK WIRE) NOTE: Use this procedure to center the steering wheel position if: VGRS actuator has been replaced VGRS ECU has been replaced Steering column or gear has been disconnected Steering wheel is still off-center after completing the steering angle sensor initialization in step 6. Actuator angle initialization Face the tires straight ahead. NOTE: Drive the vehicle to confirm steering wheel is centered. NEXT: Go to Next Step
2. Check for DTCs Is DTC C1515/15 output? B: Go to step 4 A: Go to Next Step
3. Actuator angle initialization NOTE: Complete steps (e) to (g) within 1 minute. Turn the ignition switch ON. Start the engine. Turn the steering wheel to the center. Using SST check wire, connect the terminals TS and CG of DLC3. Connect and disconnect the SST check wire to the terminal Tc of DLC3 10 times or more within 20 sec. Turn the steering wheel to the left 180° or more and the return to the center position. Connect and disconnect the SST check wire to the terminal Tc of DLC3 10 times or more within 20 sec. Check that the VGRS warning light is ON. HINT: When the VGRS warning light illuminates, DTC 1515/15 is memorized. Disconnect the SST check wire from the DLC3. Turn the ignition switch OFF. NEXT: Go to step 1 Steering angle adjustment
4. Confirm steering center Confirm that the steering wheel is centered when facing the tires straight ahead. NOTE: Drive the vehicle to confirm steering wheels centered. B: Go to step 8 A: Go to next step
5. Unlock the VGRS actuator NOTE: Do not start the engine. Turn the ignition switch OFF. (Engine stop) Disconnect the negative battery terminal. Disconnect the VGRS ECU connector "A". Connect the jumper wire from terminal MV to Battery (+) and another jumper wire from terminal LG to ground(-). NOTE: Do not apply the voltage for more than 3 minutes. NEXT
6. Steering center adjustment Turn the steering wheel to the center. NOTE: If the spiral cable for the airbag is not centered when installing the steering wheel, adjust the spiral cable to the center (See «INSTALLATION»(ref-209864-S09466471752005121100000) ). NEXT
7. Lock the VGRS actuator Confirm the ignition switch is turned OFF. Reconnect the VGRS ECU connector "A". Reconnect the battery terminal. Turn the steering wheel to the right and left by about 5 degrees and check that the steering wheel is level. NOTE: The DTC will be detected later on when not turning the steering wheel to the right and left by about 5 degrees. NEXT: Go to step 1 Actuator angle adjustment
8. Adjust the actuator angle HINT: Actuator angle adjustment is completed by turning the Test Mode ON and OFF. Make sure the ignition switch is OFF. Using the SST check wire, connect the terminals TS and CG of DLC3. Turn the ignition switch ON. Check that the VGRS waring light is blinking. Turn the ignition switch OFF and disconnect the SST check wire from the DLC3. Actuator angle sensor learning confirmation procedure: Start the engine. Turn the steering wheel from center to the left 9( and then back to center. Turn the steering wheel from center to the right 90° and then back to center. Confirm that the steering wheel is centered. Hold the steering wheel in the centered position for 3 seconds. Perform the following check procedure: Turn the steering wheel slowly to the left. While turning the steering wheel to the left, turn off the engine. Continue to turn the steering wheel slowly to the left for 3 seconds. Repeat steps (1) to (6) 15 times. NOTE: DTC C1568/68 requires that the fault occurs 5 consecutive times to set. The confirmation procedure must be performed multiple times to ensure the condition does not repeat. Recheck for DTCs If C1568/68 is set, repeat the procedure for a second time. If C1568/68 is set again, replace the VGRS actuator. END VGRS SYSTEM CALIBRATION PROCEDURE (USING HAND-HELD TESTER) Stop the vehicle and face the tires straight ahead. Connect the hand-held tester to DLC3. Turn the ignition switch ON. Perform the steering angle adjust procedure from the VGRS menu. Follow the tester prompts to complete procedure. Confirm that the VGRS warning light OFF. Turn the ignition switch OFF. Disconnect the hand-held tester. Confirm normal VGRS light operation. Start the engine. Turn the steering wheel from lock to lock to check that it rotates approximately 2.4 turns. Actuator angle sensor learning confirmation procedure: Start the engine. Turn the steering wheel from center to the left 90° and then back to center. Turn the steering wheel from center to the right 90° and then back to center. Confirm that the steering wheel is centered. Hold the steering wheel in the centered position for 3 seconds. Perform the following check procedure; Turn the steering wheel slowly to the left. While turning the steering wheel to the left, turn off the engine. Continue to turn the steering wheel slowly to the left for 3 seconds. Repeat steps (1) to (6) 15 times. NOTE: DTC C1568/68 requires that the fault occurs 5 consecutive times to set. The confirmation procedure must be performed multiple times to ensure the condition does not repeat. Recheck for DTCs If C1568/68 is set, repeat the procedure for a second time. If C1568/68 is set again, replace the VGRS actuator. Drive vehicle to confirm steering wheel is centered.

COUNTER CLEARANCE

HINT

1. Perform the following procedure to clear the DTC C1555/55.
2. When clearing the DTCs in DTC clear menu of the hand-held tester or SST check wire, DTC C1555/55 cannot be cleared.
3. When clearing DTCs using the SST check wire, perform the VGRS system calibration.

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1. Connect the hand-held tester to DLC3.
2. Turn the ignition switch ON.
3. Perform the counter clearance procedure from the VGRS menu.