Lexus ES: Deceleration Sensor (C1245)
DESCRIPTION
The parking brake ECU (brake actuator assembly) receives vehicle tilt angle information from the deceleration sensor (airbag ECU assembly) via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| C1245 | Deceleration Sensor | One of following conditions is met:
| Deceleration sensor (Airbag ECU assembly) | DTC stored | An electric parking brake system malfunction is displayed on the multi-information display. |
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | Power switch on (IG) | ○ | ○ | ○ |
| Malfunction Status | An error signal is sent from the deceleration sensor (airbag ECU assembly) | ○ | - | - |
| While the deceleration sensor (airbag ECU assembly) signal is judged to be stuck, starting off and stopping the vehicle occurs 16 times | - | ○ | - | |
| Comparison error between deceleration sensor (airbag ECU assembly) 1 and deceleration sensor (airbag ECU assembly) 2 output values occurs | - | - | ○ | |
| Detection Time | Approximately 0.3 seconds | - | 60 seconds or more | |
| Number of Trips | 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:
When replacing the deceleration sensor (airbag ECU assembly), perform initialization and calibration of the linear solenoid valve.
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PROCEDURE
| 1. | CHECK DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) |
(a) Check for DTCs.
Chassis > ABS/VSC/TRC > Trouble Codes| Result | Proceed to |
|---|---|
| DTC is not output | A |
| DTC is output | B |
| B | .gif) | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
|
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| 2. | CHECK DTC (ELECTRIC PARKING BRAKE SYSTEM) |
(a) Clear the DTCs.
Chassis > Electric Parking Brake > Clear DTCs(b) Turn the power switch off.
(c) Check for DTCs.
Chassis > Electric Parking Brake > Trouble Codes| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
| A | | REPLACE AIRBAG ECU ASSEMBLY |
| B | | USE SIMULATION METHOD TO CHECK |
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