Lexus ES: Multi-axis Acceleration Sensor Module "A" Component Internal Failure (C052096)
DESCRIPTION
The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.
The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag ECU assembly) via CAN communication.
These DTCs may be stored if one of the following occurs:- Yaw rate and acceleration sensor (airbag ECU assembly) installation abnormality.
- Yaw rate and acceleration sensor signal malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C052096 | Multi-axis Acceleration Sensor Module "A" Component Internal Failure |
|
|
| Vehicle Condition | ||||||
|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | ||
| Diagnosis Condition | The vehicle is being driven. | ○ | ○ | - | - | - |
| With the +BS terminal voltage between 9.6 and 16.5 V. | - | - | ○ | - | - | |
| Malfunction Status | The offset of the acceleration sensor is less than -2.25 m/s2. | ○ | - | - | - | - |
| The offset of the acceleration sensor is more than 2.25 m/s2. | - | ○ | - | - | - | |
| An acceleration sensor internal malfunction signal is received from the acceleration sensor (airbag ECU assembly). | - | - | ○ | - | - | |
| The value (Forward and rearward G) of the acceleration sensor is less than -14.6 m/s2. | - | - | - | ○ | - | |
| The value (Forward and rearward G) of the acceleration sensor is more than 14.6 m/s2. | - | - | - | - | ○ | |
| Detection Time | - | - | - | 3 seconds or more. | 3 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
DTC Detection Conditions: C052096| Vehicle Condition | |||||
|---|---|---|---|---|---|
| Pattern 6 | Pattern 7 | Pattern 8 | Pattern 9 | ||
| Diagnosis Condition | The vehicle is stopped. | ○ | ○ | - | - |
| Malfunction Status | The value (lateral) of the acceleration sensor is less than -7 m/s2. | ○ | - | - | - |
| The value (lateral) of the acceleration sensor is more than 7 m/s2. | - | ○ | - | - | |
| The value (lateral) of the acceleration sensor is less than -14.6 m/s2. | - | - | ○ | - | |
| The value (lateral) of the acceleration sensor is more than 14.6 m/s2. | - | - | - | ○ | |
| Detection Time | 0.4 seconds or more. | 0.4 seconds or more. | 0.8 seconds or more. | 0.8 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
CAUTION / NOTICE / HINT
NOTICE:
After replacing or reinstalling the yaw rate and acceleration sensor (airbag ECU assembly), perform acceleration sensor zero point calibration and store system information memorization after performing "Reset Memory".
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PROCEDURE
| 1. | CHECK FREEZE FRAME DATA (LATERAL G AND FORWARD AND REARWARD G) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
(d) Select a DTC to display the Freeze Frame Data.
(e) Read the freeze frame data of DTC C052096.
Chassis > Brake/EPB| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Lateral G | Lateral G | Min.: -25.105 m/s2, Max.: 24.908 m/s2 | Turning right: -25.105 to 0.000 m/s2 Turning left: 0.000 to 24.908 m/s2 | During turning: Changes in proportion with lateral acceleration |
| Forward and Rearward G | Forward and rearward G | Min.: -25.105 m/s2, Max.: 24.908 m/s2 | During deceleration: -25.105 to 0.000 m/s2 During acceleration: 0.000 to 24.908 m/s2 | During acceleration/deceleration: Changes in proportion with acceleration |
| Tester Display |
|---|
| Lateral G |
| Forward and Rearward G |
| Result | Proceed to |
|---|---|
| The value of Lateral G or Forward and rearward G is less than -14.6 m/s2 or more than 14.6 m/s2. | A |
| Other than above. | B |
| A |  | REPLACE AIRBAG ECU ASSEMBLY |
|
| 2. | CHECK FREEZE FRAME DATA (LATERAL G AND VEHICLE SPEED) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
(d) Select a DTC to display the Freeze Frame Data.
(e) Read the freeze frame data of DTC C052096.
Chassis > Brake/EPB| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Lateral G | Lateral G | Min.: -25.105 m/s2, Max.: 24.908 m/s2 | Turning right: -25.105 to 0.000 m/s2 Turning left: 0.000 to 24.908 m/s2 | During turning: Changes in proportion with lateral acceleration |
| Vehicle Speed | Vehicle speed (vehicle speed used for each control) | Min.: 0.0 km/h (0 mph), Max.: 6553.5 km/h (4072 mph) | Vehicle stopped: 0.0 km/h (0.0 mph) | When driving at constant speed: No large fluctuations |
| Tester Display |
|---|
| Lateral G |
| Vehicle Speed |
| Result | Proceed to |
|---|---|
| The value of Vehicle speed is 0 km/h (0 mph) and the value of Lateral G is less than -7 m/s2 or more than 7 m/s2. | A |
| Other than above. | B |
| A | | REPLACE AIRBAG ECU ASSEMBLY |
|
| 3. | CHECK AIRBAG ECU ASSEMBLY INSTALLATION |
(a) Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.
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OK:
The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.
The yaw rate and acceleration sensor (airbag ECU assembly) is not installed in a tilted position.
| OK | | REPLACE AIRBAG ECU ASSEMBLY |
| NG | | INSTALL AIRBAG ECU ASSEMBLY CORRECTLY |
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