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SOURCE: VSC and engine light on
The Trac light comes on automatically, in conjuction with the Check Engine Light. You need your vehicle scanned for DTC codes.
SOURCE: skid control randomly engages without turning or
I had the same problem. the jerking breaking and pulling to one side, but if u are going over 70 miles and that happens to you, you better start praying cause it will **** so hard that its hard to control. the yaw rate sensor (prox $400 on line) needs to be replace and adjustment (i beleave only the dealer can adjust). What I did to solve the problem is to eliminate the sensor ($0 cost). now my SUV drives and handle just like a regular truck without traction control. Toyota is not helping on this matter and dealers just dont care. I will not put my family thru the same scarry ride. My solution eliminate the sensor, the light is on @ all time but in return a smooth ride. Im not telling you to do what I did, but Im telling you it is the Yaw Rate Sensor. Good luck.
SOURCE: 2004 Sienna - VSC and TRAC OFF Lights are On
I have both lights on in my 2004 van also I have the engine light on. i took it to the dealer and they found the Yaw Rate Sensor (Vsc & TRAC) bad. The part is about$ 405 and is under the drivers seat. The other problems is the Catalyst System (engine light) about $1000 for parts.I have about 147,000 miles on my '04 and the problems started about 130,000.
SOURCE: i have a 2009 toyota sienna...the vsc and check
ok , we try to reset, disconnet negative battery cable few seconds, then reconnect, start engine and check
SOURCE: On my Toyota Sienna 2008, my check engine light,
On most Toyota's that are equipped with Cruise Control (Vehicle Speed Control or "VSC") and with Traction Control System (TCS or "Trac") all of these lights will come on at the same time if the Engine Control Module (ECM) determines that there is a fault in the engine management system that 1. Prevents the engine from being properly controlled. 2. Prevents the VSC from being properly controlled 3. Prevents the TCS from being properly controlled 4. Any combination of items 1,2, and 3.
Most of the time it is caused by a single fault in the engine management system. Fault codes are codes that are output by the ECM to let a diagnostician know which of the many systems, that are monitored by the ECM, is malfunctioning. To find out what the actual cause is, you must scan the ECM for fault codes then use this information to begin diagnosis of the system that the fault codes point to.
I've made up the following instructions, on how to clear VSC & TRAC Warning lights:
Zero Point Calibration of Yaw Rate and Deceleration Sensors Using Paper Clips (or jumper wires).
First, locate the 16-pin ODB II connector under the steering wheel (beneath the dash). The pins are numbered sequentially backwards from right to left (from the wide side of the connector looking at it from underneath).
Take two normal-sized paper clips (or suitable jumper wires). If using paper clips, straighten one edge of one of the paper clips. For the other, bend it open to a 90-degree angle (like an elbow).
Insert one paper clip/wire into pin # 14 (Ts), and the other paper clip/wire into pin # 4 (CG) of the OBD II connector - DO NOT allow the paper clips/wires to make contact at this point. 1. Ensure the shift lever is in "P" range. Verify that the VSC indicator light is illuminated, indicating the Recorded Zero point is erased.
Refer to diagram below:
2. Turn the ignition switch to "ON" (not start).
3. Momentarily touch the two paper clips/wires together (short) and separate again (open) - Repeat this process 5 times (within 8 seconds of turning ignition on).
4. Turn the ignition switch "OFF".
5. Remove both paper clips/jumper wires from the OBD II connector.
6. Turn the ignition switch "ON" (not start) - wait until VSC warning light turns off (approx. 20 seconds), then wait 2 seconds.
7. Turn the ignition switch "OFF".
9. Re-insert paper clips/jumper wires to terminals #4 & #14 of the OBD II connector (as per above diagram).
10. Turn the ignition switch "ON" (not start) - VSC warning light should remain illuminated for 4 seconds, then start flashing at 0.13 second intervals.
12. After VSC warning light flashes for 2 seconds, turn the ignition switch "OFF".
13. Remove paper clips/jumper wires from the OBD II connector.
Drive your vehicle to confirm VSC & TRAC warning lights have been reset and no longer illuminate.
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