Lexus NX: Zero Point Calibration of Yaw Rate Sensor undone (C1210,C1336)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) receives signals from the yaw rate and acceleration sensor (airbag ECU assembly) via CAN communication.
The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).
HINT:
If there are malfunctions in the bus lines between the yaw rate and acceleration sensor (airbag ECU assembly) and the CAN communication system, DTCs U0123 (Lost Communication With Yaw Rate Sensor Module) and U0124 (Lost Communication With Lateral Acceleration Sensor Module) will be stored.
These DTCs (C1210 and C1336) will also be stored when zero point calibration has not been completed.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|---|
| C1210 | Zero Point Calibration of Yaw Rate Sensor undone | - | Yaw rate sensor zero point calibration is incomplete. |
(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.) | - |
| C1336 | Zero Point Calibration of Deceleration Sensor undone | - | Either of the following is detected:
|
(Perform zero point calibration and check for DTCs. If no DTCs are output again, the sensor is normal.) | - |
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.
Click here
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-
When replacing the yaw rate and acceleration sensor (airbag ECU assembly), perform zero point calibration.
Click here
HINT:
When U0123 and/or U0124 is output together with C1210 and/or C1336, inspect and repair trouble areas indicated by U0123 and/or U0124 first.
Click here
PROCEDURE
| 1. | PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR |
(a) Perform zero point calibration of the yaw rate and acceleration sensor.
Click here
| Tester Display |
|---|
| Test Mode |
|
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| 2. | RECONFIRM DTC |
(a) Turn the power switch off.
(b) Clear the DTCs.
Click here
(c) Turn the power switch off.
(d) Turn the power switch on (READY).
(e) Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate the vehicle (depress the brake pedal).
(f) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTCs C1210 and/or C1336 are output. | A |
| DTCs C1210 and C1336 are not output. | B |
HINT:
- These DTCs are stored because zero point calibration has not been completed.
- End the procedure if the same DTCs are not stored after completion of zero point calibration.
| B | .gif) | END |
|
| 3. | CHECK AIRBAG ECU ASSEMBLY INSTALLATION |
(a) Turn the power switch off.
(b) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.
Click here
OK:
The airbag ECU assembly is tightened to the specified torque.
The airbag ECU assembly is not tilted.
| NG | | INSTALL AIRBAG ECU ASSEMBLY CORRECTLY |
|
| 4. | REPLACE AIRBAG ECU ASSEMBLY |
(a) Replace the yaw rate and acceleration sensor (airbag ECU assembly).
Click here
NOTICE:
Check the yaw rate and acceleration sensor signal after replacement.
Click here
|
| 5. | RECONFIRM DTC |
(a) Clear the DTCs.
Click here
(b) Turn the power switch off.
(c) Turn the power switch on (READY).
(d) Drive the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate the vehicle (depress the brake pedal).
(e) Check if the same DTC is output.
Click here
| Result | Proceed to |
|---|---|
| DTCs C1210 and/or C1336 are output. | A |
| DTCs C1210 and C1336 are not output. | B |
| A | | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| B | | END |
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*1: w/ Pre-collision System
*2: w/ Automatic High Beam System Brake warning light Power switch off → on (IG) Comes
Parts Location
PARTS LOCATION ILLUSTRATION *1 NO. 2 ENGINE ROOM RELAY BLOCK - ODS FUSE *2 FRONT SEAT INNER BELT ASSEMBLY RH *3 AIR CONDITIONING CONTROL ASSEMBLY *4 OCCUPANT DETECTION ECU *5 COMBINATION METER ASSEMBLY *6 AIRBAG ECU ASSEMBLY *7 FRONT OCCUPANT CLASSIFICATION SENSOR
