DTC C1452: Accumulator Low Pressure [08/2015 - ]: Procedure

1. Check with the customer to determine if frequent braking has been performed.

Result: 

NEXT 

See step  2

1. Clear the DTC (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).
2. Turn the ignition switch off.
3. Depress the brake pedal more than 40 times.
4. Turn the ignition switch to ON.
5. Wait for 99 seconds.
6. Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).
   RESULT
   
   

   Result	Proceed to
   DTC is output	A
   Frequent braking was not performed and DTC is not output	B
   Frequent braking was performed and DTC is not output	C

   HINT: 

   Excessive brake pedal operation results in abnormal accumulator pressure consumption. This is normal.

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )

Result: 

C 

END 

Result: 

A 

See step  3

1. Check the hydraulic circuit (Refer to ON-VEHICLE INSPECTION [08/2015 - ] ).

   OK

   Hydraulic circuit is normal (no leakage).

Result: 

NG 

REPAIR HYDRAULIC CIRCUIT 

Result: 

OK 

See step  4

Refer to PROCEDURE - Step 3

Result: 

NG 

REPLACE MASTER CYLINDER SOLENOID 

Result: 

OK 

See step  5

Refer to PROCEDURE - Step 4

Result: 

A 

REPLACE MASTER CYLINDER SOLENOID 

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )