CALIBRATION
1. DESCRIPTION
(a) After replacing any VSC related components or performing wheel alignment adjustment, clear and read the sensor calibration data.
Refer to the table below and then perform the necessary operation according to the part to be replaced in order to perform calibration.
Parts to be Replaced / Operation |
Necessary Operation |
---|---|
Skid control ECU (brake actuator assembly) |
Perform yaw rate and acceleration sensor zero point calibration and store system information. |
Yaw rate and acceleration sensor (airbag sensor assembly) |
|
Wheel alignment adjustment |
|
2. PERFORM YAW RATE AND ACCELERATION SENSOR ZERO POINT CALIBRATION AND STORE SYSTEM INFORMATION (When Using Techstream)
NOTICE:
(a) Clear the zero point calibration data and store system information.
NOTICE:
Performing the following procedure will clear the zero points of the yaw rate and acceleration sensor and system information simultaneously.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) for Manual Transmission:
Check that the shift lever is in neutral and apply the parking brake.
for Automatic Transmission:
Check that the shift lever is in P and apply the parking brake.
(4) Connect the Techstream to the DLC3.
(5) Turn the ignition switch to ON.
(6) Turn the Techstream on.
(7) Select the skid control ECU (brake actuator assembly) to clear the zero point calibration data using the Techstream.
Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Reset Memory.
(8) Check that the slip indicator light comes on.
(9) Turn the ignition switch off.
NOTICE:
If the ignition switch is turned ON for more than 15 seconds with the parking brake applied*1 or shift lever in P*2 after the zero point of the yaw rate and acceleration sensor has been cleared, only the zero point of the yaw rate sensor will be stored. If the vehicle is driven under these conditions, the skid control ECU (brake actuator assembly) will store the zero point calibration for the acceleration sensor as not being completed. The skid control ECU (brake actuator assembly) will then also indicate this as a malfunction of the VSC system using the indicator light.
(b) Perform the yaw rate and acceleration sensor zero point calibration and store system information.
NOTICE:
Performing the following procedure will perform the yaw rate and acceleration sensor zero point calibration and store system information simultaneously.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) for Manual Transmission:
Check that the shift lever is in neutral and apply the parking brake.
for Automatic Transmission:
Check that the shift lever is in P and apply the parking brake.
NOTICE:
(4) Connect the Techstream to the DLC3.
(5) Turn the ignition switch to ON.
(6) Turn the Techstream on.
(7) Switch the skid control ECU (brake actuator assembly) to Test Mode using the Techstream.
Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Test Mode.
(8) After the Test Mode has been entered, keep the vehicle stationary on a level surface for 5 seconds or more.
(9) Check that the slip indicator light comes on for several seconds and then blinks in the Test Mode pattern.
HINT:
(10) Turn the ignition switch off and disconnect the Techstream.
3. PERFORM YAW RATE AND ACCELERATION SENSOR ZERO POINT CALIBRATION AND STORE SYSTEM INFORMATION (When Using SST Check Wire)
NOTICE:
(a) Clear the zero point calibration data and store system information.
NOTICE:
Performing the following procedure will clear the zero points of the yaw rate and acceleration sensor and system information simultaneously.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) for Manual Transmission:
Check that the shift lever is in neutral and apply the parking brake.
for Automatic Transmission:
Check that the shift lever is in P and apply the parking brake.
(4) Turn the ignition switch to ON.
(5) Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
SST: 09843-18040
Text in Illustration
*a |
Front view of DLC3 |
(6) Check that the slip indicator light comes on.
NOTICE:
(7) Turn the ignition switch off.
(b) Perform the yaw rate and acceleration sensor zero point calibration and store system information.
NOTICE:
Performing the following procedure will perform the yaw rate and acceleration sensor zero point calibration, and also store system information simultaneously.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) for Manual Transmission:
Check that the shift lever is in neutral and apply the parking brake.
for Automatic Transmission:
Check that the shift lever is in P and apply the parking brake.
NOTICE:
(4) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
Text in Illustration
*a |
Front view of DLC3 |
(5) Turn the ignition switch to ON.
(6) After Test Mode has been entered, keep the vehicle stationary on a level surface for 5 seconds or more.
(7) Check that the slip indicator light comes on for several seconds and then blinks in the Test Mode pattern.
HINT:
(8) Turn the ignition switch off and disconnect SST from the DLC3.
Inspection
INSPECTION
PROCEDURE
1. INSPECT CYLINDER BLOCK FOR WARPAGE
(a) Using a precision straightedge and feeler gauge, measure the warpage
of the contact surface of the cylinder head gasket.
Standard warpage:
0 to 0.05 mm (0 to 0.00197 in.)
Maximum warpage:
0.07 mm (0.00276 ...
If the shift lever cannot be shifted from P (vehicles with an automatic transmission)
If the shift lever cannot be shifted with your foot on the brake, there may
be a problem with the shift lock system (a system to prevent accidental operation
of the shift lever). Have the vehicle inspected by your Toyota dealer immediately.
The following steps may be used as an emergency measur ...
Operation History List
OPERATION HISTORY LIST
NOTICE:
The cause of a malfunction is stored in the RAM or EEPROM in the certification
ECU (smart key ECU assembly). As the cause of a malfunction stored in the
RAM will be cleared when the cable is disconnected from the negative (-)
battery terminal, do ...