Toyota Tundra (2015 year). Manual — part 247
(a) Disconnect the A19 sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
A19-1 (VCP) - Body ground
Ignition switch ON
5.0 V
NG
REPLACE VSC ACTUATOR ASSEMBLY
OK
REPLACE BRAKE BOOSTER ASSEMBLY
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000001HY403IX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1249/49; Open in Stop Light Switch Circuit;
2015 MY Tundra [08/2014 - ]
DTC
C1249/49 Open in Stop Light Switch Circuit
DESCRIPTION
The skid control ECU detects the brake operating conditions through a signal transmitted by the stop light switch.
The skid control ECU incorporates an open circuit detection circuit.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
C1249/49
to 2.2 V for 2.5 second.
1.
When pressure sensor signal indicates pressure increase, but
stop light switch signal does not change.
2.
3.
While vehicle is accelerated to higher than 40 km/h (24.9 mph)
and then decelerated to less than 3 km/h (1.9 mph), stop light
switch signal change from OFF to ON is not detected (4 trip
detection logic).
4.
ECU-IG1 NO.
1 fuse
STOP fuse
Stop light
control relay
Stop light
switch
Stop light
switch circuit
VSC actuator
assembly
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 (STOP)
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
OK
(a) Remove the STOP fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
STOP fuse
Always
Below 1 Ω
NG
CHECK FOR SHORTS IN ALL HARNESSES AND
CONNECTORS CONNECTED TO FUSE AND REPLACE
FUSE
2.
INSPECT STOP LIGHT CONTROL RELAY (BRK NO. 1, BRK NO. 2)
(a) Remove the stop light control relays (BRK NO. 1 and BRK NO.
2) from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for BRK NO. 1
for BRK NO. 2
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C...
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