Parking Brake Reminder Alarm Continues To Sound; Parking Brake Return Reminder Alarm Does Not Sound; Parking Brake Return Reminder Alarm Sounds On Traveling - Toyota 8FGU15 Repair Manual

8 TROUBLESHOOTING
Phenomenon on
Control type
vehicle
Vehicles with
MULTI-FUNCTION
DISPLAY DX or
Buzzer related (Only
E.E.C. SPEC.:
models with "MULTI-
Parking brake re-
FUNCTION DIS-
minder alarm contin-
PLAY DX" or "E.E.C.
ues to sound even
SPEC."option)
after the parking
brake has been de-
pressed (or pulled).
Vehicles with
MULTI-FUNCTION
DISPLAY DX or
E.E.C. SPEC.:
Parking brake return
reminder alarm does
not sound. * First
perform a "Parking
brake reminder
Buzzer related (Only
alarm does not
models with "MULTI-
sound" check.
FUNCTION DIS-
PLAY DX" or "E.E.C.
Vehicles with
SPEC."option)
MULTI-FUNCTION
DISPLAY DX or
E.E.C. SPEC.:
Parking brake return
reminder alarm
sounds on traveling.
* First perform a
"Parking brake re-
minder alarm does
not sound" check.
Malfunction area
Checking method
and mode
▪ Buzzer unit:
Buzzer defect
▪ Buzzer harness
-
line (Lead-in
side):
Fault (Harness,
connector)
▪ Parking brake
switch unit:
Ground short
fault (Stuck in re-
leased state, in-
ternal damage)
▪ Parking brake
ON/OFF check with
detection mech-
analyzer
anism:
Always released
▪ Parking brake
line:
Ground short
fault (Harness,
connector)
▪ SAS/OPS con-
troller:
-
Controller defect
▪ Vehicle speed
Check sensor
sensor unit:
voltage and vehicle
speed with the ana-
Cannot detect
lyzer
low speed (In-
* With the parking
ternal damage)
brake not returned,
▪ Vehicle speed
even when the ac-
sensor line (SPD
celerator pedal is
+ side, SPD-
depressed, the
side):
alarm only sounds at
speeds above 2 km/
Link fault (Har-
h.
ness, connector)
▪ Meter unit (with
OK monitor):
-
Meter defect
8-165
Corrective action
Harness check or re-
place buzzer
If there is no
change, perform an
installation check,
harness check, or
replace the switch.
Replace
If there is no
change, perform an
installation check or
replace the sensor.
Replace
8