Tacoma

Toyota Tacoma 2015-2018 CAN Workshop Manual

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting
using How to Proceed with Troubleshooting when CAN communication system related DTCs are output
.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output
again.
DTC check procedure: Turn the ignition switch to ON, turn the blind spot monitor main switch on wait at
least 20 seconds.
After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN
communication system are displayed .
HINT:
Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication
on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction
may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while
performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
1. CHECK SUB BUS 2
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER
CONNECTION
CONDITION SPECIFIED
CONDITION
RESULT
N32-13 (CA2H) -
N32-12 (CA2L)
Cable disconnected
from negative (-)
battery terminal
54 to 69 Ω
Below 54 Ω:
Short circuit
between bus
lines
70 Ω or
higher:
Open circuit
in a main
bus line
N32-13 (CA2H) -
N32-4 (GND)
Cable disconnected
from negative (-)
battery terminal
200 Ω or
higher
Below 200
Ω:
CANH
ground short
N32-12 (CA2L) -
N32-4 (GND)
Cable disconnected
from negative (-)
battery terminal
200 Ω or
higher
Below 200
Ω:
CANL
ground short
N32-13 (CA2H) -
N32-2 (BATT)
Cable disconnected
from negative (-)
battery terminal
6 kΩ or
higher
Below 6 kΩ:
CANH +B
short
cardiagn.com

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