Toyota Tacoma (2015-2018) Service Manual: Open in ABS Solenoid Relay Circuit (C146E,C146F)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Open in ABS Solenoid Relay Circuit (C146E,C146F)

DESCRIPTION

The ABS solenoid relay is built into the master cylinder solenoid.

This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is OK, the relay turns on.

DTC No.	DTC Detecting Conditions	Trouble Areas
C146E	When either of following condition detected: Both of following conditions continue for at least 0.2 seconds. IG voltage between 9.5 V and 17 V. Relay contact open when relay ON Both of the following conditions continue for at least 0.2 seconds. IG voltage 9.5 V or less when relay ON. Relay contact remains open.	ABS NO. 2 fuse ABS solenoid relay ABS solenoid relay circuit Master cylinder solenoid
C146F	The following condition continues for at least 0.2 seconds. Relay contact closed immediately after turning IG switch to the ON position when the relay OFF.	ABS NO. 2 fuse ABS solenoid relay ABS solenoid relay circuit Master cylinder solenoid

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform zero point calibration (See page ).
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	INSPECT SKID CONTROL ECU CONNECTOR (+BS TERMINAL VOLTAGE)

(a) Disconnect the skid control ECU connector.

(b) Measure the voltage.

Standard Voltage:

Tester Connection	Specified Condition
S1-31 (+BS) - Body ground	10 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS OR CONNECTOR (GND - BODY GROUND)

(a) Disconnect the skid control ECU connectors.

(b) Measure the resistance.

Standard Resistance:

Tester Connection	Specified Condition
S1-1, 32 (GND1, GND2) - Body ground	Below 1 Ω
S2-4 (GND3) - Body ground	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

3.	RECONFIRM DTC

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

(b) Check if the same DTCs are recorded.

Result	Proceed to
DTC output	A
DTC not output	B

REPLACE MASTER CYLINDER SOLENOID

END

Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) (C1277,...,C1416)

DESCRIPTION Refer to DTCs C1401 and C1402 (See page ). DTC Code DTC Detection Condition Trouble Area C1277 C1278 Stored only during t ...

ECM Communication Circuit Malfunction (C1203)

DESCRIPTION The circuit sends TRAC, A-TRAC and VSC control information from the skid control ECU (master cylinder solenoid) to the ECM, and engine control information from the ECM to the skid con ...

Other materials:

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 ...

Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may ...

System Description
SYSTEM DESCRIPTION 1. WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system functions to lock and unlock all the doors from a distance. The system is controlled by a door control transmitter module set sub-assembly which sends radio waves to the door control receiver. The mai ...