This post provides two optional methods to do Toyota Zero Point calibration, one is to use Jumper wire, and another one is to do using Toyota TIS techstream cable.
Optional method one: Zero Point Calibration Using Jumper wire
The following manual procedure may be used in the cases where a Diagnostic Tester is
not available.
CAUTION:
While performing the Zero Point Calibration, do NOT tilt, move, or shake the vehicle.
The vehicle must remain in a stationary condition throughout the entire process.
Be sure to perform the procedure on a level surface with an inclination of less than 1%.
1. If the vehicle is equipped with A/T, ensure that the shift lever is in the “P” range and
the parking brake is applied. If the vehicle is equipped with a M/T, ensure that the
parking brake is applied.
2. Turn the ignition switch ON.
3. Using the SST, repeat a cycle of short and open between terminals Ts and CG of
DLC3 4 times or more within 8 seconds (refer to the specific vehicle EWD for TS and
CG pin location in the DLC3).
4. Verify that the VSC indicator light is lit indicating the recorded zero point is erased.
5. Turn the ignition switch OFF.
6. Be sure the terminals Ts and CG of DLC3 are disconnected.
7. Turn the ignition switch ON.
8. Check that the VSC warning light goes off about 15 seconds after the ignition switch
is turned ON.
9. After ensuring that the VSC warning light remains OFF for 2 seconds, turn the ignition
switch OFF.
10. Connect terminals Ts and CG of DLC3 using the SST.
11. Turn the ignition switch ON.
12. After turning the ignition switch ON, check that the VSC warning light is lit for about
4 seconds and then starts quick blinking at 0.13 second intervals.
13. After ensuring the blinking of the VSC warning light for 2 seconds, turn the ignition
switch OFF.
14. Remove the SST from terminals Ts and CG of DLC3.
15. Drive the vehicle for at least 5 minutes to confirm Zero Point Calibration is complete.
FYI, what about vehicle that doesn’t have the VSC light?
For example, if you have a Toyota noah year 2005 with 1AZ-fe engine that have trouble code P1589 acceleration sensor learning value. You did everything he can check engine light stays on.
The working answer goes like this:
As for P1589
Use a Toyota scan tool or Techstream and calibrate deceleration sensor. While performing the calibration follow on screen instructions. you can do the calibration by clicking Engine and ECT> Utility> Reset Memory> After that click “deceleration 0 point calibration” while you do that make sure that your car IGN switch is “ON”, hand brake pulled and your gear shift is on “P” or Neutral. At last perform the CVT Oil Calibration.
Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the EFI system, select the A/T system, and check for automatic transmission DTCs.
If the problem persists, replace the Brake Actuator Skid control ECU (ABS actuator assembly).
Optional method two: perform zero point calibration with Toyota TIS techstream cable
1) Optional Tool required:
Any of the following Toyota Diagnostic tools running TIS Techstream is required
MINI VCI 16 Pin, MINI VCI 22 Pin, mangoose VCI or MVCI Techstream + JLR mangoose + Volvo Vida dice 3 in 1
2) Step –by – step procedure
Take 08 Tundra for example, I post the procedure as follows:
1). CALIBRATION
Perform the chart below to perform calibration. Performing “Front wheel alignment adjustment”, clear and read the sensor calibration data.
2). CLEAR ZERO CALIBRATION DATA WITH TECHSTREAM SOFTWARE
(a) Connect the Toyota TIS Techstream OBD2 diagnostic cable with vehicle via OBD port
(b) Turn ignition to ON position
(c) Follow the Techstream prompts to clear the error codes (Select reset memory)
3) PEFORM ZERO CALIBRATION
(a) Enter Test Mode
Turn the ignition OFF
Check the shift level is in parking or natural and apply the parking brake
Connect the Techstream cable with vehicle via OBD port
Turn the ignition ON with engine off
(b) Set the Techstream to Test Mode (Select Test Mode)
Obtain the zero points of the master cylinder pressure sensor and deceleration sensor.
Park the vehicle on stationary level surface for 1 second or more.
Check the buzzer sound for 3 sec and make sure the fault code is erased
Turn ignition to OFF position
4). CLEAR ZERO CALIBRATION DATA WITH SST CHECK WIRE
Turn ignition ON
Check the VSC OFF indicator light is illuminating
Operate the calibration by using a check wire
5). PERFORM ZERO CALIBRATION WITH SST WIRE
(a) Enter Test Mode
Turn ignition to OFF position
Check the shift level is in parking or natural and apply the parking brake
Turn ignition ON with engine off
(b) Obtain the zero points of the master cylinder pressure sensor and deceleration sensor.
Park the vehicle in stationary level surface for 1 second or more.
Check the buzzer sound for 3 sec and make sure the fault code is erased
Turn ignition to OFF position
6). INSTALL STEERING ANGLE SENSOR
Complete the adjustment of the steering wheel and wheel alignment, and then initialize the steering angle sensor. If the order is reversed, the steering wheel and wheel alignment will become misaligned.
(a) Check that the steering wheel is in the centered position.
(b) Disconnect the negative battery terminal for more than 2 seconds. After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
(c) Reconnect the negative battery terminal
bmw icom A1:
http://www.bmwicom.org/
