How To Repair Yaw Rate Sensor
EDIT: Here are the steps for performing Nothing Point Calibration taken from the 5th Gen 4Runner Repair Transmission.
IF your 4Runner is equipped with either DAC or Crawl Control, you must complete steps 4 and/or 5 or you will become a DTC and the sideslip indicator volition e'er be lit.
I highly recommend this scale if you think the VSC on your 4Runner kicks in as well much, before or afterwards lift. Mine was overreacting both before and after the elevator, now for daily driving don't even know its at that place.
PERFORM YAW Rate AND ACCELERATION SENSOR AND STEERING Angle SENSOR ZERO Signal Calibration
[Using SST Check Wire (basically an electrical wire with each end stripped, also If possible solder each end. Just makes using the cable a bit easier.)]
NOTICE:
* While obtaining the nada points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
* Be sure to perform this process on a level surface (with an inclination of less than ane%).
(a) Clear the zero betoken calibration data.
(ane) Turn the ignition switch off.
(ii) Check that the steering bike is centered.
(three) Check that the shift lever is in P.
(four) Turn the ignition switch to ON.
(5) The ABS warning light and sideslip indicator low-cal come up on for 3 seconds to indicate that the initial check is completed.
(6) Using SST, connect and disconnect terminals 12 (TS) and 4 (CG) of the DLC3 4 times or more within 8 seconds.
Front view of DLC3
(seven) Check that the slip indicator light comes on.
(b) Perform zero point calibration of the yaw rate and acceleration sensor.
(one) Turn the ignition switch off.
(2) Check that the steering wheel is centered.
(3) Check that the shift lever is in P.
NOTICE: * DTCs 36 (Naught Indicate Scale of Yaw Rate Sensor Undone) and 39 (Naught Betoken Calibration of Acceleration Sensor Undone) are stored if the shift lever is not in P.
* If a DTC is output that indicates naught bespeak calibration is incomplete, repeat the procedure starting at the stride for clearing the zero betoken calibration data and system information.
(four) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
Front view of DLC3
(5) Plow the ignition switch to ON.
(6) Proceed 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 blink in the test mode pattern (0.125 seconds on and 0.125 seconds off).
* If the slip indicator light does not blink, perform zip point calibration again.
HINT:
* The zero point scale is performed only in one case subsequently the system enters examination mode.
* Scale cannot be performed again until the stored information is cleared.
(8) Turn the ignition switch off and disconnect SST from the DLC3.
(c) Drive the vehicle straight ahead at forty km/h (25 mph) or more than for at to the lowest degree 10 seconds.
(I was unable to exercise this task, merely driving information technology effectually should be OK)
4. PERFORM DOWNHILL Assist CONTROL CALIBRATION (w/ Downhill Assist Control)
(b) Enter examination style (when using SST check wire).
(one) Turn the ignition switch off.
(2) Using SST, connect terminals 12 (TS) and four (CG) of the DLC3.
Front end view of DLC3
(c) Turn the downhill assist control switch off.
(d) Push button the downhill aid control switch and bank check that the downhill aid control indicator calorie-free is blinking.
(east) Turn the downhill assist control switch off.
(f) Turn the ignition switch off.
(g) Check if DTC C120A is output.
HINT:
If DTC C120A is not output, calibration was performed successfully.
5. PERFORM Crawl Command CALIBRATION (w/ Crawl Control)
(two) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
Front end view of DLC3
(c) Push the crawl ON/OFF switch and check that the crawl indicator calorie-free is on while the switch is beingness pushed.
Text in Illustration
*one Crawl Command Switch
*2 ON/OFF Switch
*3 Speed Selector Switch
*4 Low
*v Medium-low
*6 Medium
*7 Medium-loftier
*viii Loftier
(I pushed in the ON/OFF button while I turned the dial and kept pushed downward till the terminate of the post-obit steps)
(d) Turn the crawl ON/OFF switch off.
(e) Turn the speed selector switch to 50 (low).
(f) Plow the speed selector switch to medium-depression.
(g) Turn the speed selector switch to M (medium).
(h) Plough the speed selector switch to medium-high.
(i) Turn the speed selector switch to H (loftier).
(j) Turn the speed selector switch to Fifty (low).
(thousand) Turn the ignition switch off.
(l) Check if DTC C120A is output.
HINT:
If DTC C120A is non output, calibration was performed successfully.
Original Post: I simply downloaded the Repair Manual, Thanks once more Nashman, and on page 522 under the restriction control department, it shows that we can have this Yaw Rate and Acceleration Sensor re-calibrated. I did a Google search and found out that many other older 4Runners have had this same problem, afterward doing a elevator, the VSC kicks on likewise much, they were able to just utilise a jumper cable between 2 terminal, perform some fancy work with the ignition and and go it back to naught. Here is a link I'one thousand sure I can have it into a dealer and take them practice it, I just prefer not to deal with dealers if it can be helped. I have no body whorl when cornering, yet my truck thinks I'm well-nigh to flip over and actuate the VSC, slam on the brakes and etc. and it's scary when your on the side of a cliff, and the brakes appoint by themselves. I don't in any ways bulldoze reckless either. Cheers,
Equally the title suggests, does anyone know how to reset the yaw rate and acceleration sensor dorsum to nada? Ever since I installed my lift, my VSC seems to kick on a little too much, I'm guessing one possibility is due to the fact that the front is now level with the rear.
Nathan
How To Repair Yaw Rate Sensor,
Source: https://www.toyota-4runner.org/5th-gen-t4rs/71093-yaw-rate-acceleration-sensor-zero-point-calibration.html
Posted by: mahoneygiver1956.blogspot.com
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