Cannot Perform Backward Tilt (Ops); Cannot Perform Material Handling Except For Lift Lower (Ops) - Toyota 8FGU15 Repair Manual

8 TROUBLESHOOTING
Phenomenon on
Control type
vehicle
For cowl lever
vehicles:
Cannot perform
backward tilt.
OPS
Cannot perform ma-
terial handling ex-
cept for lift lower.
Malfunction area
Checking method
and mode
▪ Backward tilt
switch unit:
Open fault
(Switch mounted
incorrectly, in-
ternal damage,
stuck)
▪ Backward tilt
ON/OFF check with
switch line:
analyzer
Disconnection
fault (Harness,
connector)
▪ Switch ground
line:
Disconnection
fault (Harness,
connector)
Turn the backward
▪ C/V backward tilt
tilt lock solenoid ON
lock valve:
and operate to back-
Stuck (internal
ward tilt using an
damage)
active test.
▪ Seat switch unit:
Open fault (in-
ternal damage)
▪ Seat switch line
ON/OFF check with
(Signal, ground):
analyzer
Disconnection
fault
(Harness, con-
nector)
For cowl lever
vehicles:
Turn the unload
valve solenoid OFF
and perform raising
▪ C/V unload operation using an
valve: active test.
Stuck (internal For mini lever, joy-
damage) stick lever vehicles:
Turn the unload
valve solenoid ON
and perform raising
operation using an
active test.
8-181
Corrective action
Harness check or re-
place switch
If backward tilt can-
not be performed,
replace the C/V
backward tilt lock
valve.
Harness check or re-
place switch
If raising cannot be
performed, replace
the C/V unload
valve.
8