Feels Unstable When Traveling - Toyota 8FGU15 Repair Manual

8 TROUBLESHOOTING
Phenomenon on
Control type
vehicle
Feels unstable when
traveling. (Traveling
Active control rear
lock has become dif-
stabilizer
ficult or no longer
possible)
Malfunction area
Checking method
and mode
▪ Tire unit:
Burst, tire pres-
-
sure adjustment
defect
▪ Lock cylinder
unit:
Leak, cannot
lock (Internal
Check the locked
damage)
status with an active
▪ Lock cylinder
test.
locked status:
Installation part
damaged or des-
troyed
▪ Load sensor
unit:
Sensor defect
▪ Load sensor line
Load sensor voltage
(Power supply,
check:
signal, ground):
Peform lift relief and
Disconnection
check the change in
fault (Harness,
voltage.
connector)
Short or leak
fault (Harness,
connector)
▪ Lifting height
switch unit:
ON/OFF check with
Disconnection
analyzer
fault (Internal
damage, stuck)
▪ Yaw rate sensor
unit:
Reduced sensit- Yaw rate sensor
ivity, voltage voltage check:
stuck (Internal
Check that the
damage)
voltage is approxim-
▪ Yaw rate sensor ately 2.5 V when the
line (Signal): vehicle is stopped.
Leak (Harness,
connector)
▪ Vehicle speed
sensor unit:
Cannot detect
low speeds (In-
Check sensor
ternal damage)
voltage and vehicle
▪ Vehicle speed
speed with the ana-
sensor line (SPD
lyzer
+ side, SPD-
side):
Leak fault (Har-
ness, connector)
▪ SAS/OPS con-
8-167
Corrective action
Adjust or replace
Replace
If there is no
change, perform an
installation check or
replace the sensor.
Harness check or re-
place switch
Installation check or
replace sensor
If there is no
change, perform an
installation check or
replace the sensor.
8