DTC C1254: Pressure Sensor or Switch: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Depress the brake pedal more than 40 times.
4. Turn the engine switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Accumulator Sensor	Accumulator pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V	3.58 to 5 V	If the value is constant regardless of the pump operation, an accumulator pressure sensor malfunction is suspected.

7. Check the accumulator output value.
   RESULT
   
   

   Result	Proceed to
   Output value is within "Normal Condition" range	A
   Output value is out of "Normal Condition" range	B
   Output value is constant regardless of pump operation

B → See step   3 

A: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .
2. Turn the engine switch off.
3. Depress the brake pedal more than 40 times.
4. Turn the engine switch on (IG).
5. Wait until the pump motor stops.
6. Wait for 15 minutes.
7. Depress the brake pedal and release it.
8. Check if the same DTC is output. Refer to DTC CHECK / CLEAR [06/2012 - ] .
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   3 

A → See step   4