Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000005VBD000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C142B-C146D;
Motor Power Supply Voltage Circuit; 2016 MY Tacoma [08/2015 - ]
DTC C142B Motor Power Supply Voltage Circuit
DTC C146C Open in ABS Motor Relay Circuit
DTC C146D Short in ABS Motor Relay Circuit
DESCRIPTION
The motor relay and motor fail-safe relay are built into the brake actuator assembly.
During ABS, TRAC, VSC, or brake assist operation, the skid control ECU (brake actuator assembly) turns on the
motor relay to run the pump motor in the brake actuator assembly.
When a motor system DTC is stored, the motor fail-safe relay cuts the power source supply to the motor relay for
fail-safe operation.
These DTCs may be stored when the voltage to the motor relay power source (BM terminal) is lower than the DTC
detection condition due to low output from the battery or alternator.
DTC
NO.
DETECTION
ITEM
DTC DETECTION CONDITION TROUBLE AREA
C142B
Motor Power
Supply Voltage
Circuit
When voltage at +BS terminal is 9.5 V or higher, open
in BM terminal continues for 1 second or more.
ABS NO. 1 fuse
Skid Control ECU
(Brake actuator
assembly)
Wire harness or
connector
C146C
Open in ABS
Motor Relay
Circuit
When voltage at +BS terminal is 9.5 V or higher and
motor relay ON while control operates, relay contact
OFF condition continues for 0.12 seconds or more.
ABS NO. 1 fuse
Skid Control ECU
(Brake actuator
assembly)
Wire harness or
connector
C146D
Short in ABS
Motor Relay
Circuit
Either of the following is detected:
Overcurrent in motor relay and motor
fail-safe relay continues for 0.05 seconds or
more.
Motor relay gate voltage malfunction
continues for 0.12 seconds or more.
Brake actuator
assembly (Motor
relay)
Wire harness or
connector
cardiagn.com

Leave a Reply

Your email address will not be published. Required fields are marked *