Toyota Tacoma (2015-2018) Service Manual: Reservoir Level Switch Disconnected (C1453,C1454)
DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the skid control ECU (master cylinder solenoid) when the brake fluid level drops.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1453 |
With the ECU terminal IG1 voltage at 10 to 14 V, an open in the brake fluid level warning switch circuit continues for 2 seconds or more. |
|
|
C1454 |
The fluid level of the reservoir is LOW for 40 seconds after the ignition switch is turned to ON, or for 7 seconds during pump motor operation. |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (master cylinder solenoid), perform calibration
(See page .gif)
).
PROCEDURE
|
1. |
CHECK BRAKE FLUID LEVEL |
(a) Turn the ignition switch off.
(b) Depress the brake pedal 40 times or more (until the pedal reaction feels light and pedal stroke becomes longer).
(c) Check the amount of fluid in the brake reservoir.
HINT:
When the ignition switch is turned to ON, brake fluid is sent to the accumulator and the fluid level decreases by approximately 5 mm (0.197 in.) from the level when the ignition switch is off (normal).
OK:
Brake fluid level is normal.
| NG | .gif) |
CHECK AND REPAIR BRAKE FLUID LEAKAGE |
|
.gif)
|
2. |
INSPECT BRAKE FLUID LEVEL WARNING SWITCH |
(a) Disconnect the B2 brake fluid level warning switch (brake master cylinder reservoir sub-assembly) connector.
|
(b) Measure the resistance according to the value(s) in the table below. HINT: A float is placed inside the reservoir. Its position can be changed by increasing/decreasing the level of brake fluid. Standard Resistance:
HINT: If there is no problem after finishing the above check, adjust the brake fluid level to the MAX level. |
|
| NG | |
REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY |
|
|
3. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE FLUID LEVEL WARNING SWITCH) |
(a) Disconnect the S1 skid control ECU (master cylinder solenoid) connector.
(b) Disconnect the B2 brake fluid level warning switch (brake master cylinder reservoir sub-assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S1-41 (LBL) - B2-2 |
Always |
Below 1 Ω |
|
S1-41 (LBL) - Body ground |
Always |
10 kΩ or higher |
|
S1-41 (GND) - Body ground |
Always |
Below 1 Ω |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
RECONFIRM DTC |
(a) Clear the DTCs (See page
).
(b) Turn the ignition switch off.
(c) Start the engine and idle it for approximately 40 seconds.
(d) Check if the same DTCs are 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 |
Master Cylinder Pressure Sensor Zero Point High Malfunction (C1422,C1456)
DESCRIPTION
Refer to DTCs C1421, C1423, C1424, C1455, C1457 and C1458 (See page
).
DTC Code
DTC Detection Condition
Trouble Area
C1422
...
ABS Warning Light does not Come ON
DESCRIPTION
Refer to ABS Warning Light Remains ON (See page
).
WIRING DIAGRAM
Refer to ABS Warning Light Remains ON (See page
).
CAUTION / NOTICE / HINT
NOTICE:
When replacing the sk ...
Other materials:
Installation
INSTALLATION
PROCEDURE
1. INSTALL BRAKE PEDAL PAD
(a) Install the brake pedal pad onto the brake pedal.
2. INSTALL BRAKE PEDAL SUPPORT ASSEMBLY
(a) Install the brake pedal support assembly with 4 nuts.
Torque:
14 N·m {145 kgf·cm, 10 ft·lbf}
(b) Connect the stop light switch connector t ...
Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION
for Audio Function:
The radio and display receiver assembly receives a vehicle speed signal
from the combination meter assembly and sends the signal to radio and display
receiver assembly.
for Automatic Sound Levelizer (ASL):
This circuit is necessary fo ...
Components
COMPONENTS
ILLUSTRATION
*A
for Double Cab
*B
w/o Woofer
*C
w/ Woofer
-
-
*1
LUGGAGE COMPARTMENT SIDE TRAY RH
-
-
ILLUSTRATION
*A ...
