Toyota Tundra (2015 year). Manual — part 248
OK
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3 - 4
When battery voltage is not applied to terminals 1 and 2
Below 1 Ω
3 - 5
When battery voltage is not applied to terminals 1 and 2
10 kΩ or higher
3 - 4
When battery voltage is applied to terminals 1 and 2
10 kΩ or higher
3 - 5
When battery voltage is applied to terminals 1 and 2
Below 1 Ω
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3 - 4
When battery voltage is not applied to terminals 1 and 2
Below 1 Ω
When battery voltage is applied to terminals 1 and 2
10 kΩ or higher
NG
REPLACE STOP LIGHT CONTROL RELAY
3.
INSPECT STOP LIGHT SWITCH ASSEMBLY
(a) Disconnect the A4 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
1 - 2
Pin not pushed
Below 1 Ω
Pin pushed
10 kΩ or higher
NG
REPLACE STOP LIGHT SWITCH ASSEMBLY
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
OK
4.
CHECK HARNESS AND CONNECTOR (BATTERY - SKID CONTROL ECU)
(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
A17-6 (STP2) - Body ground
Brake pedal depressed
8 to 14 V
A17-6 (STP2) - Body ground
Brake pedal released
Below 4.0 V
A17-38 (STP) - Body ground
Brake pedal depressed
8 to 14 V
A17-38 (STP) - Body ground
Brake pedal released
Below 4.0 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE VSC ACTUATOR ASSEMBLY
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM0000028KR014X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1251/51,C0273/13; Open in Pump Motor
Circuit; 2015 MY Tundra [08/2014 - ]
DTC
C1251/51 Open in Pump Motor Circuit
DTC
C0273/13 Open in ABS Motor Relay Circuit
DESCRIPTION
The ABS motor relay (skid control ECU interior circuit) supplies the power to the ABS pump motor. While the ABS
is activated, the ECU turns the motor relay ON and operates the ABS pump motor.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
C1251/51
Open in pump motor power supply circuit or open in
motor power supply circuit ground
1.
Motor stuck mechanically and does not operate
2.
Motor coil shorted and overcurrent flows
3.
ABS1 H-fuse
VSC actuator assembly
(skid control ECU)
C0273/13
more at motor relay OFF.
1.
Pump motor voltage is (IG - 4.0 V) or less for 0.1 sec.
or more at motor relay ON.
2.
specification.
3.
ABS1 H-fuse
Harness or connector
(+BM circuit)
Skid Control ECU
HINT:
C0273/13: The skid control ECU begins to detect these DTCs when the vehicle speed exceeds 15 km/h (9
mph).
WIRING DIAGRAM
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
INSPECTION PROCEDURE
NOTICE:
When replacing the VSC actuator assembly, perform zero point calibration
.
PROCEDURE
1.
PERFORM ACTIVE TEST USING TECHSTREAM (MOTOR RELAY)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTC
.
(e) Select the Active Test mode on the Techstream.
ABS/VSC/TRAC
TESTER DISPLAY
TEST PART
CONTROL RANGE
DIAGNOSTIC NOTE
Motor Relay
Motor relay
ON / OFF
OK:
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