DTC 42: Electronically Controlled Brake System Malfunction; DTC 45: Electronically Controlled Brake System Malfunction [08/2013 - ]: Procedure
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM
- Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
- Turn the power switch on (READY).
- Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
- Check if electronically controlled brake system DTCs are output. Refer to DTC CHECK / CLEAR [08/2013 - ]
.
Result
Result Proceed to Electronically controlled brake system DTC is not output. A Electronically controlled brake system DTC is output. B
B → See step 4
A: Go to next step
- RECONFIRM DTC
- Turn the power switch off.
- Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
- Turn the power switch on (READY).
- Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
- Check if the same DTC is output. Refer to DTC CHECK / CLEAR [08/2013 - ]
.
Result
Result Proceed to DTCs 42 and 45 are not output. A DTCs 42 and/or 45 are output. B
B → See step 5
A → See step 3
- USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]
- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]
- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [08/2013 - ]