Toyota 120 Platforms Forum
Google only search Toyota120

Go Back   Toyota 120 Platforms Forum > Technical write ups > Audio, Electronics and Electrical

Reply
Thread Tools Display Modes
Unread 09-01-2010, 01:23 PM   #1
iDRiVaT4R
Driver
 
Join Date: Apr 2010
Location: San Marcos, CA
Posts: 71
Default 5th Gen - Yaw Rate and Acceleration Sensor Zero Point Calibration

Here are the steps for performing Zero Point Calibration taken from the 5th Gen 4Runner Repair Manual.

IF your 4Runner is equipped with either DAC or Crawl Control, you must complete steps 4 and/or 5 or you will get a DTC and the slip indicator will always be lit.

I highly recommend this calibration if you think the VSC on your 4Runner kicks in too much, before or after lift. Mine was overreacting both before and after the lift, now for daily driving don't even know its there.

PERFORM YAW RATE AND ACCELERATION SENSOR AND STEERING ANGLE SENSOR ZERO POINT CALIBRATION (When Using SST Check Wire)

NOTICE:

* While obtaining the zero points, keep the vehicle stationary and do not vibrate, tilt, move, or shake it (do not start the engine).
* Be sure to perform this procedure on a level surface (with an inclination of less than 1%).

(a) Clear the zero point calibration data.

(1) Turn the ignition switch off.

(2) Check that the steering wheel is centered.

(3) Check that the shift lever is in P.

(4) Turn the ignition switch to ON.

(5) The ABS warning light and slip indicator light come 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


(7) Check that the slip indicator light comes on.

(b) Perform zero point calibration of the yaw rate and acceleration sensor.

(1) 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 (Zero Point Calibration of Yaw Rate Sensor Undone) and 39 (Zero Point Calibration of Acceleration Sensor Undone) are stored if the shift lever is not in P.
* If a DTC is output that indicates zero point calibration is incomplete, repeat the procedure starting at the step for clearing the zero point calibration data and system information.


(4) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

Front view of DLC3


(5) Turn the ignition switch to ON.

(6) 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 blink in the test mode pattern (0.125 seconds on and 0.125 seconds off).

HINT:

* If the slip indicator light does not blink, perform zero point calibration again.
* The zero point calibration is performed only once after the system enters test mode.
* Calibration cannot be performed again until the stored data is cleared.


(8) Turn the ignition switch off and disconnect SST from the DLC3.

(c) Drive the vehicle straight ahead at 40 km/h (25 mph) or more for at least 10 seconds. (I was unable to do this task, just driving it around should be OK)




4. PERFORM DOWNHILL ASSIST CONTROL CALIBRATION (w/ Downhill Assist Control)

(b) Enter test mode (when using SST check wire).

(1) Turn the ignition switch off.

(2) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

Front view of DLC3


(c) Turn the downhill assist control switch off.

(d) Push the downhill assist control switch and check that the downhill assist control indicator light is blinking.

(e) 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 CONTROL CALIBRATION (w/ Crawl Control)

(2) Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

Front view of DLC3




(c) Push the crawl ON/OFF switch and check that the crawl indicator light is on while the switch is being pushed.

Text in Illustration


*1 Crawl Control Switch

*2 ON/OFF Switch

*3 Speed Selector Switch

*4 Low

*5 Medium-low

*6 Medium

*7 Medium-high

*8 High

(I pushed in the ON/OFF button while I turned the dial and kept pushed down till the end of the following steps)

(d) Turn the crawl ON/OFF switch off.

(e) Turn the speed selector switch to L (low).

(f) Turn the speed selector switch to medium-low.

(g) Turn the speed selector switch to M (medium).

(h) Turn the speed selector switch to medium-high.

(i) Turn the speed selector switch to H (high).

(j) Turn the speed selector switch to L (low).

(k) Turn the ignition switch off.

(l) Check if DTC C120A is output.

HINT:

If DTC C120A is not output, calibration was performed successfully.
__________________
Past Vehicles:
1988 Toyota 4Runner 22RE (in family still)
2000 Jeep Cherokee (Sold)
2008 Toyota Tacoma 4x4 Crew Cab Sport (Sold)
2010 Toyota 4Runner Trail w/KDSS (Sold)
2007 Toyota 4Runner SR5 4x4 V8 (Sold)

Last edited by bulldog; 04-11-2016 at 04:17 PM.
iDRiVaT4R is offline   Reply With Quote
Unread 01-21-2016, 07:48 PM   #2
expat
White Boomer (Kangaroo)
 
expat's Avatar
 
Join Date: Jun 2005
Location: SoCal
Posts: 5,711
Default

Quote:
Originally Posted by jmatt64 View Post
Great information...any one know where I can get the steps for a 4th Gen (2005) 4TR? I have the SLIP,TRAC OFF, VSC OFF and now ABS light is on. Could be a different issue all together???
Use two paper clips and insert into OBD port

Top, 3rd left
Bottom, 4th right

Car on - tap clips together 4 x

Car off
Car on - 2 lights flash for 15 secs then switches off

Car off - connect two clips

Car on - lights flash hold for 30 secs

Car off - remove clips

Car on.

Works for me several times.
__________________
Mark
04 V8 SE, RST Twin stick conversion, RST Tacoma Front Axle conversion, 17x9 MT ClassicLocks, 37" Cooper STT Mud, SW Sliders & Bullbar, ARB Locked F&R, 4.56's, Smittybilt 10,000lb winch, Radflo 2.5 remote resi coilovers and Radflo 2.5 rear shocks, 1.5 4Crawler BL, Flowmaster, CB and 2m/70cm Ham, Sat. Radio, CO2 system, Lightforce, African Outback Rack, Budbuilt, Front Runner RTT.
expat is offline   Reply With Quote
Reply

Tags
zero point calibration

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yaw Rate and Acceleration Sensor Zero Point Calibration iDRiVaT4R 5th Gen 4Runner 17 04-11-2016 04:20 PM
5th Gen Yaw Rate and Acceleration Sensor Zero Point Calibration iDRiVaT4R Audio, Electronics and Electrical 0 09-01-2010 01:23 PM


Buy your Toyota120 sticker!

All times are GMT -7. The time now is 05:48 AM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2005-2013 Toyota120.com