Tacoma

Toyota Tacoma 2015-2018 CAN Workshop Manual

INSPECTION PROCEDURE
NOTICE:
Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1
minute or more without operating the key, switches or opening or closing the doors. After that, disconnect
the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before
measuring the resistance.
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the
negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative
(-) battery terminal notices before proceeding with work .
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, wait at least 60 seconds and then drive the vehicle at
a speed of 5 km/h (3 mph) or more for 6.2 seconds or more.
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.
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