DTC 42: Electronically Controlled Brake System Malfunction; DTC 45: Electronically Controlled Brake System Malfunction [10/2014 - ]: Procedure

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
2. Turn the power switch on (READY).
3. Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
4. Check if electronically controlled brake system DTCs are output (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   Result

   Result	Proceed to
   Electronically controlled brake system DTCs are not output.	A
   Electronically controlled brake system DTCs are output.	B

Result: 

B 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - 10/2015] or DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] )

Result: 

A 

See step  2

1. Turn the power switch off.
2. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
3. Turn the power switch on (READY).
4. Drive the vehicle at a speed of approximately 40 km/h (25 mph) or more for 60 seconds or more.
5. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   Result

   Result	Proceed to
   DTCs 42 and 45 are not output.	A
   DTCs 42 and/or 45 are output.	B

Result: 

A 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result: 

B 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )