Lexus ES: Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component (U031857)
DESCRIPTION
If the vehicle information stored in the forward recognition camera does not match the vehicle information sent from the skid control ECU (brake booster with master cylinder assembly), the forward recognition camera stores DTC U031857.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from |
|---|---|---|---|---|---|
| U031857 | Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component | The vehicle information sent from the skid control ECU (brake booster with master cylinder assembly) does not match that stored in the forward recognition camera. |
| Does not come on | Radar Cruise2 |
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the forward recognition camera, replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, it is necessary to perform forward recognition camera adjustment.
HINT:
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition: Click here
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Sequential Recognition: Click here
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Check for electronically controlled brake system DTCs.
Chassis > ABS/VSC/TRAC > Trouble Codes| Result | Proceed to |
|---|---|
| Electronically controlled brake system DTCs are not output | A |
| Electronically controlled brake system DTCs are output | B |
| A | .gif) | REPLACE FORWARD RECOGNITION CAMERA |
| B | | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
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SEE MORE:
Replacement
REPLACEMENT
PROCEDURE
1. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH
Click here
2. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH
Click here
3. REMOVE NO. 1 ENGINE UNDER COVER
Click here
4. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY
Click here
5. REPLACE HYBRID TRANSAXLE FLU
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