Tacoma

Toyota Tacoma 2015-2018 CAN Workshop Manual

(1) Two resistors of 120 Ω are installed in parallel across the ends of the CAN main bus lines. They are
called terminating resistors. These resistors allow the changes of the voltage differential between the
CAN bus lines to be accurately judged. To allow proper function of CAN communication, it is necessary
to have both terminating resistors installed. Since the two resistors are installed in parallel, this results
in a measurement of approximately 60 Ω.
3. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
(a) V Bus
(1) Combination meter assembly
(2) Main body ECU (Multiplex network body ECU)
(3) Spiral cable with sensor sub-assembly
(4) Airbag sensor assembly
(5) ECM
(6) Air conditioning amplifier assembly
(7) Network gateway ECU*1
(8) Navigation receiver assembly*2
(9) Radio and display receiver assembly*3
(10) Certification ECU (Smart key ECU assembly)*4
(11) Brake booster assembly (Skid control ECU)*5
(12) Brake actuator assembly (Skid control ECU)*6
(13) Door control and tire pressure monitoring system receiver assembly*7
(14) 4 wheel drive control ECU*8
(b) Sub bus 2*1
(1) Network gateway ECU
(2) Clearance warning ECU assembly*9
(3) Blind spot monitor sensor LH*10
*1: w/ Blind Spot Monitor System or Intuitive Parking Assist System
*2: for Navigation Receiver Type
*3: for Radio and Display Type
*4: w/ Smart Key System
*5: for Hydraulic Brake Booster
*6: for Vacuum Brake Booster
*7: w/ Tire Pressure Warning System and Tire Inflation Pressure Display Function
*8: for 4WD
*9: w/ Intuitive Parking Assist System
*10: w/ Blind Spot Monitor System
4. CIRCUIT DESCRIPTION
(a) The V bus and sub bus 2 each have termination circuits with two resistors of 120 Ω.
5. TROUBLESHOOTING REMARKS
(a) DTCs for the CAN communication system can be checked using the Techstream. The DLC3 is connected to
the CAN communication system, but no DTCs exist regarding problems in the DLC3 or the DLC3 branch
lines. If there is a malfunction in the DLC3 or the DLC3 branch lines, ECUs on the CAN cannot output DTCs
to the Techstream.
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