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:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Sliding Roof (Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)) DTC Code Detection Item See page B2341 Sensor (Motor) Failure B2342 Switch Failure ...

Route cannot be Calculated
PROCEDURE 1. SET DESTINATION (a) Set another destination and check if the system can calculate the route correctly. OK: Route can be correctly calculated. OK NORMAL OPERATION NG PROCEED TO NEXT SUSPECTED AREA SHOWN ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY WITHOUT DOOR (for Vehicle not Involved in Collision) (a) Perform a diagnostic system check (See page ). (b) With the instrument panel passenger airbag ...