Lexus ES: Deceleration Sensor Internal Circuit (C1419,C1435)
DESCRIPTION
The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).
If an internal malfunction signal from the yaw rate and acceleration sensor (airbag ECU assembly) is detected by the skid control ECU (brake booster with master cylinder assembly), DTC C1419 and/or DTC C1435 is stored.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C1419 | Deceleration Sensor Internal Circuit | 1137 | Acceleration sensor internal malfunction signal is detected. | Acceleration sensor (airbag ECU assembly) | Comes on |
|
| C1435 | Yaw Rate Sensor Internal Circuit | 711 712 | Yaw rate sensor internal malfunction signal is detected. | Yaw rate sensor (airbag ECU assembly) | Does not come on | VSC DTC |
MONITOR DESCRIPTION
- The acceleration sensor (airbag ECU assembly) detects a malfunction in an internal sensor (longitudinal G sensor or lateral G sensor) during self-diagnosis. When an abnormal acceleration sensor (airbag ECU assembly) data value is received via CAN communication, the skid control ECU (brake booster with master cylinder assembly) judges that the acceleration sensor (airbag ECU assembly) is malfunctioning and illuminates the MIL and stores this DTC.
MONITOR STRATEGY
C0520 (Case 3)| Related DTCs | C0520 (Case 3): Acceleration sensor internal malfunction |
| Required Sensors/Components(Main) | Acceleration sensor (airbag ECU assembly) |
| Required Sensors/Components(Related) | Skid control ECU (brake booster with master cylinder assembly) |
| Frequency of Operation | Continuous |
| Duration | - |
| MIL Operation | Immediately |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
C0520 (Case 3)| Monitor runs whenever the following DTCs are not stored | None |
| Lost communication with yaw rate and acceleration sensor (airbag ECU assembly) | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
C0520 (Case 3)| Either of the following conditions is met | - |
| Acceleration sensor 1 (longitudinal G) error (CAN communication data) | "1" (abnormality) |
| Acceleration sensor 2 (lateral G) error (CAN communication data) | "1" (abnormality) |
COMPONENT OPERATING RANGE
C0520 (Case 3)| All of the following conditions are met | - |
| Lost communication with yaw rate and acceleration sensor (airbag ECU assembly) | Not detected |
| Yaw rate and acceleration sensor power supply voltage (IG) invalidation/validation (CAN communication data) | "0" (valid) |
| Acceleration sensor 1 (longitudinal G) error (CAN communication data) | "0" (no abnormality) |
| Acceleration sensor 2 (lateral G) error (CAN communication data) | "0" (no abnormality) |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Wait 10 seconds.
- Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
-
Read the DTCs.
HINT:
- If a DTC is output, the system is malfunctioning.
- If a DTC is not output, perform the following procedure.
-
If the DTCs are not output, perform a universal trip and check for permanent DTCs.
Click here
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HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTCs are output, the system is normal.
CAUTION / NOTICE / HINT
NOTICE:
After replacing or reinstalling the yaw rate and acceleration sensor (airbag ECU assembly), perform yaw rate and acceleration sensor zero point calibration after clearing previously calibrated data.
Click here
PROCEDURE
| 1. | REPLACE AIRBAG ECU ASSEMBLY |
(a) Replace the yaw rate and acceleration sensor (airbag ECU assembly).
Click here
| NEXT |  | END |
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