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 |
- INF Code 1137: SAE Code C0520 (Case 3)
- ABS DTC
| | 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 C0520 (Case 3):
- 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 
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 | | 
