Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000005VA1000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C1241; Low Power
Supply Voltage Malfunction; 2016 MY Tacoma [08/2015 - ]
DTC C1241 Low Power Supply Voltage Malfunction
DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU (brake actuator assembly) stores this
DTC and the fail-safe function prohibits ABS operation.
This DTC is stored when the +BS terminal voltage deviates from the DTC detection condition due to a malfunction
in the power supply or charging circuit such as the battery or generator circuit, etc.
The DTC is canceled when the +BS terminal voltage returns to normal.
DTC
NO.
DETECTION ITEM DTC DETECTION CONDITION TROUBLE AREA
C1241
Low Power Supply
Voltage
Malfunction
Any of the following is detected:
When vehicle speed is 3 km/h (2 mph) or
more, +BS terminal voltage is continuously
below 9.5 V for 10 seconds or more.
When solenoid relay is on, +BS terminal
voltage is below 9.5 V and relay contact is
off for 0.22 seconds or more.
When +BS terminal voltage is below 9.5 V,
power supply voltage of vehicle speed
sensor is continuously low for 60 seconds
or more.
When fail-safe motor relay is on and +BS
terminal voltage is below 9.5 V, fail-safe
motor relay overcurrent continues for 0.05
seconds or more.
ABS NO. 2 fuse
Battery
Charging system
Wire harness or
connector
Skid control ECU
(Brake actuator
assembly)
HINT:
DTC will be output when conditions for any of the patterns in the table above are met.
WIRING DIAGRAM
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