lights TOYOTA SIENNA 2007 Service User Guide

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–63
BC
DESCRIPTION
DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by the blinking pattern of the ABS warning light.
WIRING DIAGRAM
HINT:
When warning lights continue to blink, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in one or more ECU is suspected.
INSPECTION PROCEDURE
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the
table below.
Standard voltage
NG
OK
TC and CG Terminal Circuit
1INSPECT DLC3 (BETWEEN TC of DLC3 AND CG of DLC3)
C114571E09
E106867E21
Tester Connection Specified Condition
D1-13 (TC) - D1-4 (CG) 10 to 14 V
Go to step 3

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–73
BC
TEST MODE PROCEDURE
1. WARNING LIGHT AND INDICATOR LIGHT BULB
CHECK
(a) Check the warning lights.
(1) Release parking brake pedal.
(2) When the ignition switch is turned to the ON
position, check that the ABS warning light,
BRAKE warning light, VSC warning light, TRAC
OFF indicator light (2WD) and SLIP indicator
light stay on for approx. 3 seconds.
HINT:
• When the parking brake is applied or the level
of brake fluid is low, the BRAKE warning light
comes on.
• If the ECU has any stored DTCs, the ABS
warning light, VSC warning light and TRAC
OFF indicator light (2WD) comes on.
• If the indicator does not come on, inspect it
the bulb is blown out, and also the wire
harness between the skid control ECU and
the combination meter.
• If the indicator remains on, proceed to
troubleshooting for the light circuit below.
2. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL
CHECK) (WHEN USING INTELLIGENT TESTER):
(a) When having replaced the skid control ECU and/or
yaw rate and deceleration sensor, perform zero
point calibration of the yaw rate and deceleration
sensor.
HINT:
• If the ignition switch is turned from the ON
position to the ACC or off during test mode
(signal check), DTCs of the signal check function
will be erased.
• During test mode (signal check), the skid control
ECU records all DTCs of the signal check
function. By performing the test mode (signal
check), the codes are erased if normality is
confirmed. The remaining codes are the codes
where an abnormality was found.
F045096E07
Trouble Area See procedure
ABS warning light circuitBC-141 or BC-145
VSC warning light circuitBC-147 or BC-150
BRAKE warning light circuitBC-152
TRAC OFF indicator light circuit (2WD)BC-157 or BC-162
SLIP indicator light circuitBC-164 or BC-167

BC–84BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DTC CHECK / CLEAR
1. DTC CHECK/CLEAR (WHEN USING INTELLIGENT
TESTER):
(a) DTC check
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Read the DTCs following the prompts on the
tester screen.
(b) DTC clear
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Operate the intelligent tester to clear the codes.
HINT:
Refer to the intelligent tester operator's manual
for further details.
2. DTC CHECK/CLEAR (WHEN USING SST CHECK
WIRE):
(a) DTC check
(1) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(2) Turn the ignition switch to the ON position.
(3) Read DTC from the ABS and VSC warning lights
on the combination meter.
HINT:
If no code appears, inspect the TC and CG
terminal circuit, and ABS and VSC warning light
circuits.
(4) As an example, the illustration below shows the
blinking patterns of the normal system code and
trouble codes 11 and 21.
E144486E01
G022986E01
Trouble Area See Procedure
TC and CG terminal circuitBC-171
ABS warning light circuitBC-141 or BC-145
VSC warning light circuitBC-147 or BC-150
I042843E03

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–85
BC
(5) Codes are explained in the code table (See
page BC-88).
(6) After completing the check, disconnect terminals
TC and CG of the DLC3, and turn off the display.
If 2 or more DTCs are detected at the same
time, the DTCs will be displayed in ascending
order.
(b) DTC clear
(1) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(2) Turn the ignition switch to the ON position.
(3) Clear the DTCs stored in the ECU by depressing
the brake pedal 8 times or more within 5
seconds.
(4) Check that the warning light indicates the normal
system code.
(5) Remove the SST from the terminals of the
DLC3.
HINT:
Clearing the DTCs cannot be performed by
removing the battery cable or the ECU-IG fuse.
3. END OF DTC CHECK/CLEAR:
(a) Turn the ignition switch to the ON position.
(b) Check that the ABS and VSC warning lights go off
within approximately 3 seconds.
G022986E01
BR03890

RS–18SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
(5) Diagnostic circuit
• This circuit constantly diagnoses system
malfunctions. When a malfunction is
detected, it lights up the SRS warning light on
the combination meter assembly to inform the
driver.
(6) Memory circuit
• When a malfunction is detected in the
diagnostic circuit, it is coded and stored in the
memory circuit.
(e) SRS WARNING LIGHT
(1) The SRS warning light is located on the
combination meter assembly. It comes on to
inform the driver of system trouble when a
malfunction is detected in self-diagnosis of the
center airbag sensor assembly. Under normal
operating conditions, when the ignition switch is
turned to the ON position, it comes on for
approximately 6 seconds and then goes off.