Toyota Tundra (2015 year). Manual — part 214
A
NEXT
NEXT
NEXT
NEXT
B
GO TO STEP 5
C
GO TO STEP 6
4.
DIAGNOSTIC TROUBLE CODE CHART
(a) Proceed to Diagnostic Trouble Code Chart
.
NEXT
GO TO STEP 7
5.
SYMPTOM SIMULATION
(a) Proceed to How to Proceed with Troubleshooting
.
6.
CIRCUIT INSPECTION*
7.
IDENTIFICATION OF PROBLEM
8.
REPAIR OR REPLACEMENT
BRAKE CONTROL: TRAILER BRAKE CONTROL SYSTEM: HOW...
9.
CONFIRMATION TEST*
NEXT
END
BRAKE CONTROL: TRAILER BRAKE CONTROL SYSTEM: HOW...
Last Modified: 9-16-2014
6.6 U
Doc ID: RM000001MXB014X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: TRAILER BRAKE CONTROL SYSTEM: TERMINALS OF ECU; 2015 MY Tundra [08/2014 -
]
TERMINALS OF ECU
1. TERMINALS OF ECU
Text in Illustration
*a
Component without harness connected
(Trailer Brake Control ECU [Brake Control with Bracket Relay])
-
-
TERMINAL NO. (SYMBOL)
TERMINAL DESCRIPTION
1
- (Not used)
2 (IG)
IG power source
3 (TAIL)
TAIL signal
4 (CANH)
CAN communication line H
5 (GND)
Trailer brake control ECU (Brake control with bracket relay) ground
6 (ILL-)
Illumination signal
7 (BRK)
Trailer brake output
8 (+B)
Power supply (from battery)
9 (STOP)
Stop light switch signal input
10 (CANL)
CAN communication line L
2. TERMINAL INSPECTION
(a) Disconnect the J156 trailer brake control ECU (brake control with bracket relay) connector and measure
the voltage or resistance on the wire harness side.
BRAKE CONTROL: TRAILER BRAKE CONTROL SYSTEM: TER...
Text in Illustration
*a
-
-
HINT:
Voltage cannot be measured with the connector connected to the trailer brake control ECU (brake control
with bracket relay) as the connector is watertight.
TERMINAL NO.
(SYMBOL)
WIRING
COLOR
TERMINAL DESCRIPTION
CONDITION
SPECIFIED
CONDITION
J156-2 (IG)- Body
ground
Y - Body
ground
IG power source
Ignition switch
ON
11 to 14 V
J156-5 (GND)-
Body ground
W-B - Body
ground
Trailer brake control ECU (Brake
control with bracket relay) ground
Always
Below 1 Ω
J156-8 (+B)- Body
ground
B - Body
ground
Power supply (from battery)
Always
11 to 14 V
J156-9 (STOP)-
Body ground
BR - Body
ground
Stop light switch signal input
Brake pedal
depressed
8 to 14 V
Brake pedal
released
Below 1.5 V
BRAKE CONTROL: TRAILER BRAKE CONTROL SYSTEM: TER...
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