Lexus ES: Steering Angle Sensor Unusual Bank Angle Detected (C1440)
DESCRIPTION
If the skid control ECU (brake booster with master cylinder assembly) determines that the vehicle is being driven at a steep bank angle, the skid control ECU (brake booster with master cylinder assembly) stores DTC C1440 while VSC operation is temporarily disabled.
This is not a malfunction if the system and sensor circuits are normal and normal VSC operation resumes.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C1440 | Steering Angle Sensor Unusual Bank Angle Detected | 1157 | Driving at a steep bank angle. | Yaw rate sensor (airbag ECU assembly) | Does not come on | VSC DTC |
PROCEDURE
| 1. | CHECK DTC |
(a) Clear the DTCs.
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(b) Turn the power switch off.
(c) Turn the power switch on (READY).
(d) Perform a road test.
(e) Check if the same DTC is output.
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| Result | Proceed to |
|---|---|
| DTC C1440 is output. | A |
| Yaw rate and acceleration sensor DTCs are output. | B |
| DTC C1440 is not output. | C |
| B |  | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
| C | | END (VSC TEMPORARILY DISABLED) |
|
| 2. | CLEAR DTC |
(a) Clear the DTCs.
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| NEXT | | END |
