DESCRIPTION
The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1254 |
There is an accumulator pressure sensor malfunction (the fluid pressure does not change when the pump operates or when the brake is applied). |
Master cylinder solenoid (Accumulator pressure sensor) |
CAUTION / NOTICE / HINT
NOTICE:
When replacing the master cylinder solenoid, perform calibration (See page ).
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (ACCUMULATOR SENSOR) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Depress the brake pedal more than 40 times.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) 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. |
(g) 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 |
REPLACE MASTER CYLINDER SOLENOID |
|
2. |
RECONFIRM DTC |
(a) Clear the DTCs (See page ).
(b) Turn the ignition switch off.
(c) Depress the brake pedal more than 40 times.
(d) Turn the ignition switch to ON.
(e) Wait until the pump motor stops.
(f) Wait for 15 minutes.
(g) Depress the brake pedal and release it.
(h) Check if the same DTC is output (See page
).
Result |
Proceed to |
---|---|
DTC is output |
A |
DTC is not output |
B |
A |
REPLACE MASTER CYLINDER SOLENOID |
B |
USE SIMULATION METHOD TO CHECK |
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZING FUNCTION WITH TECHSTREAM
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Be sure to make a note of the current settings before customizing.
...
TC and CG Terminal Circuit
DESCRIPTION
DTC output mode is set by connecting terminals 13 (TC) and 4 (CG) of the DLC3.
The DTCs are output by the blinking of the tire pressure warning light.
WIRING DIAGRAM
HINT:
When each warning light blinks continuously, a ground short in the w ...