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, wait at least 60 seconds, and then drive the vehicle
at a speed of 36 km/h (22 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.
PROCEDURE
1.
CHECK FOR SHORT IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 2 CAN
JUNCTION CONNECTOR)
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION CONDITION SPECIFIED CONDITION
C9-1 (CANH) - C9-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Combination Meter Assembly)
HINT:
If the resistance becomes normal (between 108 to 132 Ω) when the connector is disconnected, there may
be a short in the combination meter assembly.
NG
GO TO STEP 2
OK
REPLACE COMBINATION METER ASSEMBLY
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