Part 3

INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

INITIALIZATION (Continued)

11. ELECTRIC PARKING BRAKE SYSTEM
NOTICE:
- If the electric parking brake ECU or electric parking brake actuator is replaced, perform the "RESET MEMORY" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures.
- Even after the power switch is turned OFF, the electric parking brake ECU may store a DTC as a result of removing a connector or fuse, as the ECU is still operating. Therefore, during inspection or replacement, turn the power switch OFF and wait for 20 seconds before removing the following: 1) connectors of the electric parking brake ECU, and 2) fuses of the electric parking brake system circuit.

(a) RESET MEMORY (with Techstream)
(1) Turn the power switch OFF.
(2) Connect the Techstream to the DLC3.
(3) Turn the power switch ON (IG) and the Techstream on.
(4) Enter the following menus: Chassis / Electric Parking Brake / Utility / Reset Memory.
(5) Follow the tester display and perform reset memory.
HINT: When the reset memory is completed, the parking brake indicator light (RED) will blink at 0.5 seconds intervals.





(b) RESET MEMORY (without Techstream)
(1) Turn the power switch OFF.
(2) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST: 09843-18040
NOTICE:
Do not connect the wrong terminals, as this will cause parts to be damaged.




(3) Turn the power switch ON (IG).
HINT: The parking brake indicator light (RED) will blink at 0.25 seconds intervals.
(4) Perform both of the following procedures within 8 seconds:
1 Perform the following with the electric parking brake switch twice: lock condition -> off -> release condition -> off.
2 Perform the following with the brake pedal: depress -> release -> depress -> release.




(5) With the power switch ON (IG), disconnect the connection of terminals 13 (TC) and 4 (CG) of the DLC3.
(6) Check that the parking brake indicator light (RED) blinks at 0.5 seconds intervals.
NOTICE:
If terminals 13 (TC) and 4 (CG) of the DLC3 are not disconnected, the blinking pattern (0.5 seconds intervals) cannot be checked.
HINT: If the parking brake indicator light (RED) blinking pattern (0.5 seconds intervals) is confirmed, the clear procedure is completed. If not confirmed, repeat the procedures above.

(c) ACQUIRE TENSION SENSOR ZERO POINT
(1) After performing reset memory, perform the release control. Check that the parking brake indicator light (RED) turns off.
(d) PARKING BRAKE BEDDING
CAUTION:
Performing parking brake bedding forms the friction surfaces of the parking brake shoe and rear disc, which creates the basic braking force of the parking brake. If bedding is not performed, the parking brake performance may not be normal.
NOTICE:
If one of the following is performed, perform parking brake bedding.
- Rear disc is replaced or removed and installed
- Parking brake shoe is replaced or removed and installed
- Electric parking brake actuator is replaced or removed and installed
(1) Turn the power switch OFF.
(2) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST: 09843-18040
NOTICE:
Do not connect the wrong terminals, as this will cause parts to be damaged.




(3) Turn the power switch ON (IG).
(4) Perform the following procedures with the electric parking brake switch within 8 seconds:
1 Turning the lock switch ON and OFF 3 times.
2 Turn the release switch ON and OFF 3 times.




(5) Check that the system is in test mode.
HINT:
- When the system enters test mode, the parking brake indicator light (RED) starts blinking.
- The multi-information display shows "EPB TEST" (*). If it is not displayed, repeat the procedures above.
- *: EPB stands for electric parking brake.




(6) Perform parking brake bedding.
1 Drive the vehicle at 30 km/h (19 mph).
2 Push the parking brake switch to the lock side for 5 seconds.
NOTICE:
The braking power is generated from the parking brake while driving the vehicle. This will cause the vehicle speed to decrease. Depress the acceleration pedal to maintain the speed at 30 km/h (19 mph).
HINT:
- The parking brake indicator light (RED) stops blinking at 0.125 seconds intervals, and illuminates.
- The buzzer turns ON (beeping sound).
- The tension is automatically adjusted.

3 After 5 seconds, check that the buzzer and the parking brake indicator light (RED) turn off.
HINT: The brake force decreases.

4 Release the parking brake lock switch.

12. VARIABLE GEAR RATIO STEERING SYSTEM (INITIALIZATION)
(a) STEERING ANGLE SENSOR INITIALIZATION (to obtain a tire angle (during straight-ahead driving) signal)




(1) Turn the power switch ON (IG), and check that the master warning light illuminates for a few seconds.
NOTICE:
If the warning light remains on or blinks, 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.
HINT:
- At this point, the steering wheel will still remain off-center by 5 to 10°.
- In this step, the neutral position of the steering wheel is restored from the steering control ECU memory.
(3) Confirm that steering angle sensor initialization is completed (using the Techstream).
1 Enter the VGRS menu using the Techstream. Select "Straight Angle Valid Flag" from "Data List". Check if the steering angle sensor has obtained a tire angle (during straight-ahead driving) signal.
Standard:
"Valid" is displayed on the Techstream screen.
(4) Confirm that steering angle sensor initialization is completed (not using the Techstream).
1 Stop the vehicle (power switch turned to ON (READY)).
2 Slowly turn the steering wheel from lock to lock.
3 If it turns approximately 2.7 turns, steering angle sensor initialization is completed. If it turns approximately 3.2 turns, steering angle sensor initialization is not completed.
NOTICE:
If the steering wheel turns approximately 3.2 turns, drive the vehicle on a straight road at 35 km/h (22 mph) or more for 5 seconds or longer. Then confirm the initialization again.

13. VARIABLE GEAR RATIO STEERING SYSTEM (CALIBRATION)
(a) VGRS SYSTEM CALIBRATION PROCEDURE (USING SST CHECK WIRE)
NOTICE:
Use this procedure to center the steering wheel if:
- The steering actuator (power steering gear assembly) has been replaced.
- The steering control ECU has been replaced.
- The steering column or steering intermediate shaft has been disconnected.
- The steering wheel is still off-center after completing the steering angle sensor initialization.

1. FACE TIRES STRAIGHT AHEAD
NOTICE:
Drive the vehicle to confirm that the steering wheel is centered.

NEXT -- Continue to next step.
2. CHECK DTC
(a) Check for DTCs.

Result





B -- Go to step 4
A -- Continue to next step.
3. PERFORM ACTUATOR ANGLE INITIALIZATION
SST: 09843-18040
NOTICE:
If the procedures from *1 to *2 are not completed within 1 minute, or if errors are made during these procedures, perform the initialization again from the beginning.




(a) Turn the power switch ON (READY).
(b) Center the steering wheel.
(c) Using SST, connect terminals 12 (TS) and 4 (CG), and 13 (TC) and 4 (CG) of the DLC3. (*1)
(d) Disconnect SST from terminal 12 (TS) of the DLC3, and turn the steering wheel to the left 180° or more.
(e) Connect SST to terminal 12 (TS) of the DLC3.
(f) Disconnect SST from terminal 13 (TC) of the DLC3, and turn the steering wheel to the right 180° or more.
(g) Connect SST to terminal 13 (TC) of the DLC3. (*2)
HINT: When the master warning light comes on, DTC C1591/51 is memorized.
(h) Disconnect SST from the DLC3.
(i) Turn the power switch OFF.
NEXT -- Continue to next step.
4. FACE TIRES STRAIGHT AHEAD
(a) Confirm that the steering wheel is centered when facing the tires straight ahead.
NOTICE:
Drive the vehicle to confirm that the steering wheel is centered.

Result





B -- Go to step 8
A -- Continue to next step.
5. UNLOCK STEERING ACTUATOR
NOTICE:
Do not turn the power switch ON (READY).
(a) Turn the power switch OFF.
(b) Disconnect the negative (-) terminal cable from the auxiliary battery.




(c) Disconnect the z16 connector from the steering actuator.
(d) Connect a jumper wire from terminal LV to the positive (+) 12 V battery terminal and another jumper wire from terminal LG to the negative (-) 12 V battery terminal.
NOTICE:
Do not apply voltage for more than 3 minutes.

NEXT -- Continue to next step.
6. STEERING CENTER ADJUSTMENT
(a) Center the steering wheel.
NOTICE:
If the centering of the spiral cable was not confirmed when the steering wheel was installed, confirm the centering of the spiral cable.

NEXT -- Continue to next step.
7. LOCK STEERING ACTUATOR
(a) Disconnect the positive (+) and negative (-) 12 V battery terminal cables from the steering actuator.
(b) Connect the z16 connector to the steering actuator.
(c) Connect the negative (-) terminal cable to the auxiliary battery.
(d) Turn the steering wheel approximately 3° to the left and right. Confirm that the reaction force can be felt.
NOTICE:
- If the above procedures are not followed correctly, a DTC will be detected. If a DTC is detected, perform the above procedures again and then check for DTCs.
- Perform these procedures with the power switch OFF.

NEXT -- Continue to next step.
8. ADJUST ACTUATOR ANGLE
HINT: Activating and ending test mode will complete actuator angle adjustment.
(a) Make sure the power switch is OFF.
NOTICE:
Do not touch the steering wheel during these procedures.




(b) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
SST: 09843-18040
(c) Turn the power switch ON (IG).
(d) Confirm that the "VGRS TEST MODE" is displayed on the multi-information display when test mode is activated.
HINT: Wait approximately 5 seconds.
(e) Turn the power switch OFF.
(f) Disconnect SST from terminals 12 (TS) and 4 (CG) of the DLC3.
(g) Turn the power switch ON (IG) again.
NEXT -- Continue to next step.
9. CHECK MASTER WARNING LIGHT
(a) Confirm that the master warning light is off.
(b) Turn the power switch OFF, then ON (IG).
(c) Confirm that the master warning light is operating normally.
NEXT -- Continue to next step.
10. CHECK STEERING WHEEL OPERATION
(a) Turn the power switch ON (READY).
(b) Perform the steering angle sensor initialization.
(c) Turn the steering wheel from lock to lock and check that it rotates approximately 2.7 turns.
(d) Drive the vehicle and confirm that the steering wheel is centered.
NEXT -- END
14. VARIABLE GEAR RATIO STEERING SYSTEM (CALIBRATION)
(a) VGRS SYSTEM CALIBRATION PROCEDURE (USING TECHSTREAM)
1. FACE TIRES STRAIGHT AHEAD
NOTICE:
Drive the vehicle to confirm that the steering wheel is centered.

NEXT -- Continue to next step.
2. PERFORM VGRS SYSTEM CALIBRATION
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / VGRS / Utility / Steering Angle Adjust.
(e) Perform the following procedures displayed on the Techstream.
NEXT -- Continue to next step.
3. CHECK MASTER WARNING LIGHT
(a) Confirm that the master warning light is off.
(b) Turn the power switch OFF.
(c) Disconnect Techstream from the DLC3.
(d) Turn the power switch ON (IG).
(e) Confirm that master warning light is operating normally.
NEXT -- Continue to next step.
4. CHECK STEERING WHEEL OPERATION
(a) Turn the power switch ON (READY).
(b) Perform the steering angle sensor initialization.
(c) Turn the steering wheel from lock to lock and check that it rotates approximately 2.7 turns.
(d) Drive the vehicle and confirm that the steering wheel is centered.
NEXT -- END
15. POWER STEERING SYSTEM
(a) ROTATION ANGLE SENSOR VALUE INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION
NOTICE:
Clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point if any of the following has occurred:
- The power steering ECU has been replaced.
- The power steering gear assembly has been replaced.
- Steering effort differs between left and right.
(1) Inspection before calibration.
1 Connect the Techstream to the DLC3.
2 Turn the power switch ON (IG).
3 Turn the Techstream on.
Select "IG Supply" from the Data List.
4 Check the IG power supply voltage on the Techstream screen.

EMPS





Standard voltage:
11 to 14 V
NOTICE:
If the IG power supply voltage is less than 11 V, calibration cannot be performed. In this case, charge or replace the auxiliary battery, and then perform calibration.
(2) Clearing rotation angle sensor calibration value, rotation angle sensor value initialization, and torque sensor zero point calibration.
NOTICE:
- If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTC before starting calibration.
- If DTC C1526 (Motor Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor value cannot be initialized. Clear the DTC before starting initialization.
1 Connect the Techstream to the DLC3.
2 Turn the power switch ON (IG).
3 Turn the Techstream on.
Select "Torque Sensor Adjustment".
4 Follow the procedures on the Techstream display to clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point.
NOTICE:
- When initializing the rotation angle sensor value, observe the following to stabilize sensor voltage:
After turning the power switch ON (IG), wait for at least 2.5 seconds before turning the steering wheel. Do not turn the steering wheel quickly.
- The steering wheel will vibrate during torque sensor zero point calibration. Do not touch the steering wheel while it is vibrating or for 2 seconds after it stops.

16. ZERO POINT CALIBRATION
(a) Zero point calibration procedures
(1) Check that all of the following conditions are met:

- The vehicle is parked on a level surface.
- No objects are placed on the front passenger seat.
- The front passenger seat belt buckle switch is OFF.
(2) Adjust the seat position according to the table below.





(3) Connect the Techstream to the DLC3.
(4) Turn the power switch ON (IG).
(5) Perform zero point calibration by following the prompts on the tester screen.
HINT:
- Refer to the Techstream operator's manual for further details.
- If the zero point calibration is performed when the calibration conditions are not satisfied, DTC B1797 is output.
- If the zero point calibration has failed, DTC B1797 is output.
- If After Exchange is selected before the previous ECU data are stored in the Techstream, the display screen returns to CONDITION SELECT ECU: Occupant Detect.