Canada - ABS/TCS - VSC Lamp ON/DTC C1234 Set
Bulletin
1302
Issue Date
January 08. 2004
Market
Canada
Title:
DTC C1234 - YAW RATE SENSOR (VSC)
Component
BRAKE TSB1302
Model
'03 Sienna
TSB REVISION NOTICE:
December 03, 2004: Production Change Information table was updated with new VINS and drivetrain options.
Previous versions of this TSB should be discarded.
INTRODUCTION:
In cases where the VSC indicator is illuminated and setting fault code DTC C1234, the yaw rate sensor may be setting an improper diagnostic code. Replace the yaw rate sensor with a new service part.
APPLICABLE VEHICLES:
2004 model year Sienna vehicles produced BEFORE the Production Change Effective VINs shown.
PRODUCTION CHANGE INFORMATION:
PARTS INFORMATION:
Service Part Identification
Countermeasure service parts are identified by the serial number (see bar code label) on the connector side of the sensor. There are 10 digits on the barcode label. The first 9 digits are the serial number. The Serial Number 300134916 and greater, are the countermeasure parts.
WARRANTY INFORMATION:.
REPAIR PROCEDURE:
The yaw rate sensor is located under the right front passenger seat. After replacing the yaw rate sensor, perform zero point calibration of the yaw rate sensor.
ZERO POINT CALIBRATION PROCEDURE WITH DIAGNOSTIC TESTER:
NOTE:
While obtaining the zero point, do not cause any vibration to the vehicle by tilting, moving, shaking, or starting the engine. Keep it in a stationary position. Be sure to perform this procedure on a level surface (within an inclination of 1%).
1. Shift the shift lever to 'P' position.
2. Hook up the Diagnostic Tester to the DLC3.
NOTE:
It is not required to have the vehicle idling to for this operation to communicate with the vehicle as stated on the TDT, turn the key to the ON position, engine OFF
3. Operate the Diagnostic Tester to Reset Memory and clear the current zero point calibration.
4. Operate the Diagnostic Tester to Signal Check mode.
5. Turn the ignition switch "ON."
6. Keep the vehicle in the stationary condition on the level surface for 2 seconds or more.
7. Check that the VSC warning light blinks.
NOTE:
If the VSC warning light does not blink, perform the zero point calibration again.
8. Turn the ignition switch OFF.
9. Start vehicle and drive straight ahead for 10 sec above 12 km/h, and check reading on TDT for Steering angle. ( 0 +/- 3 deg)
ZERO POINT CALIBRATION PROCEDURE WITHOUT DIAGNOSTIC TESTER:
NOTE:
While obtaining the zero point, do not cause any vibration to the vehicle by tilting, moving, shaking, or starting the engine. Keep it in a stationary position. Be sure to perform this procedure on a level surface (within an inclination of 1%).
1. Move the gear selector to "P" position.
2. Clear the zero point calibration using the SST check wire. SST P/N 09843--18040.
a) Turn the ignition switch "ON"
b) Using the SST at DLC3, connect and disconnect terminals TS and CG four (4) times or more within 8 seconds.
c) Check that the VSC warning light is lit indicating the recorded zero is erased.
d) Turn the ignition switch to "OFF" within 15 second.
3. Procedures for test modes:
a) Using the SST at DLC3, connect terminal Ts and CG.
b) Check that the steering wheel is in the straightahead position and move the gear selector to the "P" position.
c) Turn the ignition switch to "ON".
4. Keep the vehicle in the stationary condition for two (2) seconds or more, on the level floor.
5. Check that the VSC warning light blinks.
6. If the VSC warning light does not blink, perform the zero point calibration again.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.