Tacoma

Toyota Tacoma 2015-2018 CAN Workshop Manual

The airbag sensor assembly is connected to the CAN communication system, but the airbag sensor assembly
does not store or output CAN communication DTCs.
(s) Spiral Cable with Sensor Sub-assembly
HINT:
The spiral cable with sensor sub-assembly is connected to the CAN communication system, but the spiral
cable with sensor sub-assembly does not store or output CAN communication DTCs.
7. DTC COMBINATION TABLE (OPEN IN CAN BRANCH OF V BUS, PAST COMMUNICATION
ERROR)
(a) Regarding a past communication error of ECU and sensor connected to the V bus (in this case, normal is
displayed when performing the CAN bus check, but communication DTCs are output), the probable CAN
branch that had a malfunction can be determined based on the following DTC combination table.
HINT:
B
ased on the table below and DTCs output from ECUs connected via CAN communication, the probable part
for which communication stop occurred can be determined.
Regarding an open in a CAN branch and a communication stop that is currently occurring, the
malfunctioning part can be confirmed easily by performing the CAN bus check using the Techstream because
the ECU or sensor connected to the CAN branch does not respond (the ECU or sensor name will not be
displayed on the screen).
If an open in a CAN main bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground
short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a
message indicating a communication error may be displayed on the Techstream screen. In this case, check
the resistance of the CAN bus (steps 7 to 9) first .
If an open occurs in just one of the lines of a CAN branch, DTCs which are not related to malfunctioning
parts may be output (DTCs may be displayed randomly), or a message indicating a communication error
may be displayed.
- TROUBLE MODE (OPEN IN ONE CAN BRANCH LINE)
V BUS
OUTPUT ECU OUTPUT
DTC
CENTER AIRBAG
SENSOR
COMMUNICATION
STOP MODE
AIR
CONDITIONING
AMPLIFIER
COMMUNICATION
STOP MODE
NAVIGATION
RECEIVER
ASSEMBLY
COMMUNICATION
STOP MODE
RADIO RECEIVER
ASSEMBLY
COMMUNICATION
STOP MODE
V
Bus
Airbag Sensor
Assembly
- - - - -
Air Conditioning
Amplifier
Assembly
U0100 X
U0142 X
U0155 X
Navigation
Receiver
Assembly*1
U0100 X X
U0129 X X
U0140 X X
U0155 X X
U1110 X X
Radio and
Display
U0100 X X
U0129 X X
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