Tacoma

Toyota Tacoma 2015-2018 CAN Workshop Manual

Last Modified: 11-13-2015 6.6 J Doc ID: RM000001ZUR0AEX
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Open in One Side of CAN Branch Line; 2016 MY
Tacoma [08/2015 - ]
Open in One Side of CAN Branch Line
DESCRIPTION
If an ECU or sensor is not displayed on the CAN Bus Check screen of the Techstream and some ECUs and sensors
repeatedly appear and disappear from the screen when the CAN main bus lines are normal (there is no open,
short, short to +B or short to GND in the main bus lines), there may be an open circuit in either of the lines in a
CAN branch.
HINT:
If some ECUs and sensors repeatedly appear and disappear from the CAN Bus Check screen,
communication between the normal ECUs (sensors) and the Techstream may be affected by the incomplete
signals that are output from the ECU that has an open circuit in either of its CAN branch lines. In this case,
the CAN branch lines for the ECUs and sensors that repeatedly appear and disappear from the screen are
normal and the ECU that is not displayed on the screen may be the main cause of the problem (this ECU
may have an open circuit in either of its CAN branch lines).
SYMPTOM TROUBLE AREA
2 or more ECUs and/or sensors do not appear on the
Techstream CAN Bus Check screen.
One side of CAN branch line is open, or output signals
are incomplete.
Main body ECU (Multiplex network body ECU)
Air conditioning amplifier assembly
Airbag sensor assembly
Spiral cable with sensor sub-assembly
(Steering sensor)
Certification ECU (Smart key ECU
assembly)*1
4 wheel drive control ECU*2
Navigation receiver assembly*3
Radio and display receiver assembly*4
Network gateway ECU*5
Door control and tire pressure monitoring
system receiver assembly*6
Brake booster assembly (Skid control ECU)*7
Brake actuator assembly (Skid control
ECU)*8
*1: w/ Smart Key System
*2: for 4WD
*3: for Navigation Receiver Type
*4: for Radio and Display Type
*5: w/ Blind Spot Monitor System or Intuitive Parking Assist System
*6: w/ Tire Pressure Warning System and Tire Inflation Pressure Display Function
*7: for Hydraulic Brake Booster
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