Toyota Tundra (2015 year). Manual — part 2694
JUNCTION BLOCK ASSEMBLY)
25.
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY
GROUND)
(a) Connect the cable to the negative (-) battery terminal.
Text in Illustration
*a
-
-
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected
.
(b) Disconnect the DA, DB and DD main body ECU (driver side junction block assembly) connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
DB-21 (GND1) - Body ground
Always
Below 1 Ω
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
DA-1 (ALTB) - Body ground
Always
11 to 14 V
DB-13 (BECU) - Body ground
Always
11 to 14 V
DD-43 (IG) - Body ground
Ignition switch ON
11 to 14 V
DD-45 (ACC) - Body ground
Ignition switch ACC
11 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U1002;...
OK
REPLACE MAIN BODY ECU (DRIVER SIDE
JUNCTION BLOCK ASSEMBLY)
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U1002;...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000002VTI015X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Trailer Brake Controller Communication Stop
Mode; 2015 MY Tundra [08/2014 - ]
Trailer Brake Controller Communication Stop Mode
DESCRIPTION
DETECTION ITEM
SYMPTOM
TROUBLE AREA
Trailer Brake Controller
Communication Stop
Mode
Either condition is met:
"Trailer Brake Controller" is not
displayed on the "Bus Check" screen.
"Brake Control with Bracket Relay
Communication Stop Mode" in "DTC
Combination Table" applies.
Power source or inside
brake control with
bracket relay
Brake control with
bracket relay CAN
branch wire or
connector
Brake control with
bracket relay
For vehicles with a trailer brake control system.
WIRING DIAGRAM
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Trailer...
NEXT
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication
with the CAN, which causes resistance variation.
PROCEDURE
1.
PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the
battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice
before proceeding with work
.
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Trailer...
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