Toyota Tacoma manuals

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.

  • Hydraulic circuit
  • Accumulator pressure sensor (master cylinder solenoid)

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page PROCEDURE PROCEDURE ).

PROCEDURE

1.

CUSTOMER PROBLEM ANALYSIS

(a) Check with the customer to determine if frequent braking has been performed.

NEXT

2.

RECONFIRM DTC

(a) Clear the DTC (See page ). (b) Turn the ignition switch off. ).

(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 ).

Result

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

USE SIMULATION METHOD TO CHECK

C

END

A

3.

CHECK HYDRAULIC CIRCUIT

(a) Check the hydraulic circuit (See page OK: ).

OK:

Hydraulic circuit is normal (no leakage).

NG

REPAIR HYDRAULIC CIRCUIT

OK

4.

READ VALUE USING TECHSTREAM (ACCUMULATOR SENSOR)

NG

REPLACE MASTER CYLINDER SOLENOID

OK

5.

RECONFIRM DTC

(a) Clear the DTCs (See page ). (b) Turn the ignition switch off. ).

(b) Turn the ignition switch off.

(c) Check if the same DTC is output (See page ). Result ).

Result

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:

Installation
INSTALLATION PROCEDURE 1. INSTALL STEERING PAD (a) Check that the ignition switch is off. (b) Check that the cable is disconnected from the negative (-) battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE STEERING GEAR OUTLET RETURN TUBE (a) Using a union nut wrench, remove the steering gear outlet return tube. 2. REMOVE STEERING TURN PRESSURE TUBE (a) Using a union nut wrench, remove the 2 pressure tubes. (b) Remove the 4 O-rings from the pressure tubes. 3. ...

Speedometer Malfunction
DESCRIPTION The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication system (CAN V1 Bus). The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU supplies power to the vehicle speed sensor ...

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