Toyota Tacoma (2015-2018) Service Manual: SM Solenoid Circuit (C1225-C1228,C1468,C1469,C146A,C146B)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / SM Solenoid Circuit (C1225-C1228,C1468,C1469,C146A,C146B)

DESCRIPTION

The solenoid goes on when signals are received from the skid control ECU (master cylinder solenoid) and controls the pressure action on the wheel cylinders thus controlling the braking force.

DTC No.	DTC Detecting Conditions	Trouble Areas
C1225	Open or short in SMCR circuit continues for 0.05 seconds or more.	Master cylinder solenoid SMCR circuit
C1226	Open or short in SREA circuit continues for 0.05 seconds or more.	Master cylinder solenoid SREA circuit
C1227	Open or short in SREC circuit continues for 0.05 seconds or more.	Master cylinder solenoid SREC circuit
C1228	Open or short in STR circuit continues for 0.05 seconds or more.	Master cylinder solenoid STR circuit
C1468	Open or short in SFRH or SFRR circuit continues for 0.05 seconds or more.	Master cylinder solenoid SFRH or SFRR circuit
C1469	Open or short in SFLH or SFLR circuit continues for 0.05 seconds or more.	Master cylinder solenoid SFLH or SFLR circuit
C146A	Open or short in SRRH or SRRR circuit continues for 0.05 seconds or more.	Master cylinder solenoid SRRH or SRRR circuit
C146B	Open or short in SRLH or SRLR circuit continues for 0.05 seconds or more.	Master cylinder solenoid SRLH or SRLR circuit

WIRING DIAGRAM

PROCEDURE

1.	RECONFIRM DTC

HINT:

This DTCs are set when a problem is identified in the master cylinder solenoid.

The solenoid circuit is in the master cylinder solenoid.

Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if the DTCs are output before replacing the master cylinder solenoid.

(a) Clear the DTC (See page (b) Check if the same DTCs are detected. ).

(b) Check if the same DTCs are detected.

Result	Proceed to
DTC output	A
DTC not output	B

REPLACE MASTER CYLINDER SOLENOID

END

Zero Point Calibration of Yaw Rate Sensor Undone (C1210,C1336)

DESCRIPTION The skid control ECU (master cylinder solenoid) receives signals from the yaw rate and acceleration (airbag sensor assembly) via the CAN communication system. The airbag sensor assembl ...

Acceleration Sensor Stuck Malfunction (C1232,C1243,C1245,C1279)

Other materials:

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Smart key system (for start function) data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform rep ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by check ...

Yaw Rate Sensor Circuit (C1AA4,C1AA5)
DESCRIPTION The forward recognition camera receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the yaw rate and acceleration sensor (airbag sensor assembly) detects an abnormal yaw rate sensor signal or yaw rate sensor assembly power suppl ...