Toyota Tacoma (2015-2018) Service Manual: Accumulator Low Pressure (C1452)
DESCRIPTION
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1452 |
After braking, the fluid pressure inside the accumulator is below the threshold within 3.2 seconds. |
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (master cylinder solenoid), perform calibration
(See page .gif)
).
PROCEDURE
|
1. |
CUSTOMER PROBLEM ANALYSIS |
(a) Check with the customer to determine if frequent braking has been performed.
|
.gif)
|
2. |
RECONFIRM DTC |
(a) Clear the DTC (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 for 99 seconds.
(f) Check if the same DTC is output (See page
).
|
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.
| B | .gif) |
USE SIMULATION METHOD TO CHECK |
| C | |
END |
|
|
3. |
CHECK HYDRAULIC CIRCUIT |
(a) Check the hydraulic circuit (See page ).
OK:
Hydraulic circuit is normal (no leakage).
| NG | |
REPAIR HYDRAULIC CIRCUIT |
|
|
4. |
READ VALUE USING TECHSTREAM (ACCUMULATOR SENSOR) |
| NG | |
REPLACE MASTER CYLINDER SOLENOID |
|
|
5. |
RECONFIRM DTC |
(a) Clear the DTCs (See page
).
(b) Turn the ignition switch off.
(c) 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 |
Invalid Data Received from Deceleration Sensor (C1442,C1443)
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw
rate and acceleration sensor (airbag sensor assembly) via the CAN communication
system.
The airbag senso ...
Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) (C1281,...,C1458)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
C1281
Stored only during test mode.
Master cylinder pres ...
Other materials:
Noise Occurs
PROCEDURE
1.
NOISE CONDITION
(a) Check from which direction the noise comes (front left or right, or rear
left or right).
OK:
The location of the noise source can be determined.
NG
GO TO STEP 3
OK
...
Clearance Warning Buzzer Circuit
DESCRIPTION
This circuit consists of the No. 1 clearance warning buzzer and clearance warning
ECU assembly. An ECU-excited type buzzer is used. The battery voltage supplied through
the buzzer is grounded inside the clearance warning ECU assembly using a pulsed
digital pattern, producing sound ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT DISC
(a) Align the matchmarks of the front disc and the front axle hub and
install the front disc.
Text in Illustration
*a
Matchmark
HINT:
When replacing the disc with a new one, se ...
