Toyota Tacoma (2015-2018) Service Manual: System Description

Toyota Tacoma (2015-2018) Service Manual / Multiplex Communication / Lin Communication System / System Description

SYSTEM DESCRIPTION

1. LIN COMMUNICATION SYSTEM DESCRIPTION

The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed through LIN communication because of an open in the communication lines or other reasons, the master control ECU of the relevant system will store a DTC. Refer to the table below about the communication bus lines and connected components.

HINT:

Each component has a fail-safe function which activates to maintain the minimum performance of the system and protect the system.
In the following table, "○" indicates that the function applies, and "-" indicates that it does not.

Door Bus Lines

Component	Master Control	LIN Communication DTC Output Function
Main Body ECU (Multiplex Network Body ECU)	○	○
Front Power Window Regulator Motor Assembly LH*1	-	-
Front Power Window Regulator Motor Assembly RH*1	-	-
Power Window Regulator Master Switch Assembly*1	-	-
Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)*2	-	-

*1: w/ Jam Protection Function
*2: w/ Sliding Roof

Certification Bus Lines (w/ Smart Key System)

Component	Master Control	LIN Communication DTC Output Function
Certification ECU (Smart Key ECU Assembly)	○	○
Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)	-	-

Parts Location

PARTS LOCATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

System Diagram

SYSTEM DIAGRAM 1. DOOR BUS LINES 2. CERTIFICATION BUS LINES (w/ Smart Key System) ...

Other materials:

Front Radar Sensor Incorrect Axial Gap (C1A11,C1A14)
DESCRIPTION When the system determines that the vehicle is driving straight ahead based on signals from the yaw rate and acceleration sensor (airbag sensor assembly), etc., the millimeter wave radar sensor assembly performs self-diagnosis to check if the sensor beam axis is misaligned. C1A11 ...

Inspection
INSPECTION PROCEDURE 1. INSPECT TRANSMISSION WIRE (a) Measure the resistance according to the value(s) in the table below. Text in Illustration *a Component without harness connected (Transmission Wire) Standard Resistance: ...

4WD Control Switch Circuit
WIRING DIAGRAM PROCEDURE 1. CONFIRM PROBLEM SYMPTOM (a) Confirm the problem symptoms. Result Result Proceed to The 4WD indicator light (green) and 4LO indicator light remain off A The 4WD indica ...