Toyota Tundra (2015 year). Manual — part 239
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000WF0022X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0278/11; Open or Short Circuit in ABS
Solenoid Relay Circuit; 2015 MY Tundra [08/2014 - ]
DTC
C0278/11 Open or Short Circuit in ABS Solenoid Relay Circuit
DESCRIPTION
The solenoid relay (skid control ECU interior circuit) supplies power to the ABS solenoid and TRC solenoid.
After the ignition switch is turned ON, the solenoid is determined to be normal by the initial check self-diagnosis,
the relay switches on. If any open or short circuits are detected, the relay switches off.
This DTC may be set if the voltage supply to the solenoid relay (+BS) falls below the DTC detection threshold due
to the battery or alternator outputs being insufficient.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
C0278/11
0.056 seconds or more.
1.
Voltage supply to solenoid valve stops for 0.056
seconds or more.
2.
ABS2 H-fuse
Harness or connector
(+BS circuit)
Skid control ECU
WIRING DIAGRAM
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
INSPECTION PROCEDURE
NOTICE:
When replacing the VSC actuator assembly, perform zero point calibration
.
PROCEDURE
1.
INSPECT FUSE (ABS2)
(a) Remove the ABS2 H-fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
OK
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
ABS2 H-fuse
Always
Below 1 Ω
NG
CHECK FOR SHORTS IN ALL HARNESSES AND
CONNECTORS CONNECTED TO FUSE AND REPLACE
FUSE
2.
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY
GROUND)
(a) Disconnect the A17 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A17-32 (+BS) - Body ground
Always
11 to 14 V
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A17-16 (GND1) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
3.
RECONFIRM DTC
(a) Clear the DTCs
.
(b) Start the engine.
(c) Check if the same DTCs are output
.
Result
RESULT
PROCEED TO
DTC is output
A
DTC is not output
B
B
USE SIMULATION METHOD TO CHECK
A
REPLACE VSC ACTUATOR ASSEMBLY
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
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