DESCRIPTION
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C122D14 | Brake Master Cylinder Pressure Sensor Supply Voltage Circuit Short to Ground or Open | Master cylinder pressure sensor power supply voltage decrease occurs or history of voltage decrease exists, and defective master cylinder pressure sensor output continues for 1.2 seconds or more. |
|
WIRING DIAGRAM
Click here
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (+BS TERMINAL) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the A41 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
A41-14 (+BS) - Body ground | Always | 11 to 14 V |
A41-14 (+BS) -A41-1 (GND1) | Always | 11 to 14 V |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. | CLEAR DTC |
(a) Reconnect the A41 skid control ECU (brake actuator assembly) connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Operate the Techstream to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
Chassis > Brake/EPB > Clear DTCs(e) Press the DTC clear button.
(f) Turn the engine switch off.
|
3. | RECONFIRM DTC |
(a) Turn the engine switch on (IG).
(b) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.
Chassis > Brake/EPB > Trouble Codes(c) Check if the same DTC is output.
Result | Proceed to |
---|---|
DTC C122D14 is not output. | A |
DTC C122D14 is output. | B |
A | USE SIMULATION METHOD TO CHECK |
B | REPLACE BRAKE ACTUATOR ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Brake Fluid: On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT BRAKE FLUID LEVEL IN RESERVOIR (a) Check the fluid level. If the brake fluid level is lower than the MIN line, inspect for brake fluid leaks and brake pad wear. If necessary, refill the reservoir with brake fluid to the MAX line after repair or replaceme ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Lane Control System: Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Chassis / Lane Control / Trouble Codes. Chassis > Lane Control > Trouble Codes (e) Check for DTCs (Test Failed / Pending / Conf ...