Toyota Tacoma (2015-2018) Service Manual: Transfer L4 Position Switch Circuit (C1268)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Vacuum Brake Booster) / Transfer L4 Position Switch Circuit (C1268)

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1268	Transfer L4 Position Switch Circuit	Either of the following is detected: The skid control ECU (brake actuator assembly) detects an L4 detection switch (Transfer shift actuator assembly) open circuit. The skid control ECU (brake actuator assembly) receives an L4 abnormal status signal from the HDCS terminal.	L4 detection switch (Transfer shift actuator assembly) L4 detection switch circuit Skid control ECU (Brake actuator assembly)

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page PROCEDURE ).

PROCEDURE

1.	INSPECT L4 DETECTION SWITCH (TRANSFER SHIFT ACTUATOR ASSEMBLY)

(a) Inspect the transfer shift actuator assembly (See page OK: ).

OK:

The transfer shift actuator assembly is normal.

REPLACE TRANSFER SHIFT ACTUATOR ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - L4 DETECTION SWITCH)

(a) Disconnect the S1 skid control ECU (brake actuator assembly) connector.

(b) Disconnect the T4 L4 detection switch (Transfer shift actuator assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
S1-5 (EXI4) - T4-9	Always	Below 1 Ω
S1-5 (EXI4) - Body ground	Always	10 kΩ or higher
T4-10 - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR (L4 DETECTION SWITCH CIRCUIT)

3.	CHECK HARNESS AND CONNECTOR (HDCS TERMINAL)

(a) Disconnect the skid control ECU (brake actuator assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
S1-27 (HDCS) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	RECONFIRM DTC

(a) Clear the DTC (See page (b) Check if the same DTC is recorded (See page ).

(b) Check if the same DTC is recorded (See page Result Result ).

Result

Result	Proceed to
DTC is output	A
DTC is not output	B

REPLACE BRAKE ACTUATOR ASSEMBLY

USE SIMULATION METHOD TO CHECK

Vehicle Control History

VEHICLE CONTROL HISTORY VEHICLE CONTROL HISTORY (a) A part of the control history can be confirmed using the vehicle control history. Click here ...

Steering Angle Sensor Zero Point Malfunction (C1290)

DESCRIPTION The skid control ECU (brake actuator assembly) acquires steering angle sensor zero point every time the ignition switch is turned ON and the vehicle is driven at 35 km/h (22 mph) or m ...

Other materials:

Does not Play even after Bluetooth Audio Mode is Selected
CAUTION / NOTICE / HINT HINT: Even if the portable player can play audio content, it may not be able to play via the in-vehicle device. This does not necessarily indicate a malfunction of the in-vehicle device. PROCEDURE 1. CHECK OPERATION (a) Check if the po ...

Engine Coolant Temperature Receiver Gauge Malfunction
DESCRIPTION In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM. WIRING DIAGRAM CAUTION / NOTIC ...

Back window (vehicles with sliding type)
The back window can be opened and closed using the lock release lever. Open/close Push the lock release lever and slide the back window. ■Closing the back window Make sure that the back window is securely closed after closing it. CAUTION ■While driving Keep the back window close ...