Toyota Tundra (2015 year). Manual — part 2742
INSPECTION PROCEDURE
NOTICE:
When using the Techstream with the ignition switch OFF to troubleshoot:
Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until
communication between the Techstream and vehicle begins.
HINT:
DTC B2325 is output when communication between the front power window regulator motor assembly LH
and main body ECU (driver side junction block) stops.
When DTC B1206 and B2321 are output simultaneously, perform the troubleshooting for DTC B1206 first
.
PROCEDURE
1.
CLEAR DTC
(a) Clear the DTC
.
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A
2.
CHECK FOR DTC
(a) Check for DTCs
.
Result
RESULT
PROCEED TO
DTC B2321 output reoccurs
A
DTC B2321 output does not reoccur
B
B
USE SIMULATION METHOD TO CHECK
3.
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REGULATOR MOTOR LH)
(a) Disconnect the J2 main body ECU (driver side junction
block) connector.
(b) Disconnect the N12 front power window regulator motor assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
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OK
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
J2-10 (LIN2) - N12-9 (LIN)
Always
Below 1 Ω
J2-10 (LIN2) or N12-9 (LIN) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH (REGULATOR
MOTOR LH - BATTERY AND BODY GROUND)
(a) Disconnect the N12 front power window regulator motor
assembly LH connector.
(b) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
N12-1 (GND) - Body ground
Always
Below 1 Ω
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
N12-2 (B) - Body ground
Always
11 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
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5.
REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH
(a) Temporarily replace the front power window regulator motor assembly LH with a new or normally
functioning one
.
(b) Clear the DTC
.
6.
CHECK FOR DTC
(a) Check for DTCs
.
Result
RESULT
PROCEED TO
DTC B2321 output does not reoccur
A
DTC B2321 output reoccurs
B
B
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION
BLOCK)
A
END (FRONT POWER WINDOW REGULATOR MOTOR
ASSEMBLY LH IS DEFECTIVE)
MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM:...
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