Lexus ES: Air Bag Circuit (C147D)
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) receives the secondary collision brake control request signal from the airbag ECU assembly.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C147D | Air Bag Circuit | 451 | An abnormal secondary collision brake control request signal is received 2 times or more when communication with the airbag ECU assembly is possible. |
| Does not come on | Secondary collision brake DTC HINT: The DTC is cleared when the conditions return to normal. |
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".
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PROCEDURE
| 1. | CHECK DTC (AIRBAG SYSTEM) |
(a) Check if airbag system DTCs are output.
Body Electrical > SRS Airbag > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| DTCs are output. | B |
| A | .gif) | REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY |
| B | | INSPECT AIRBAG SYSTEM |
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System Diagram
SYSTEM DIAGRAM Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Skid control ECU (brake actuator assembly) Steering angle sensor Steering angle sensor request signal CAN communication line Steering angle sensor Skid control ECU (brake actuator a
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