Toyota 62-8FDU15, Repair Manual

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8-156 8 TROUBLESHOOTING
Control type
Phenomenon on
vehicle Malfunction area
and mode
Checking method Corrective action
Travel and load
handling control
For vehicles with
travel and load
handling control:
Engine is always
slow to rev up.
(Even with the direc-
tion lever left in F or
R position and the
brake applied, the
engine is still slow to
rev up)
▪ Brake switch
unit:
Open fault
(Stuck in de-
pressed state, or
internal damage)
▪ Brake switch
line:
Disconnection
fault (Harness,
connector, fuse)
ON/OFF check with
analyzer Harness check or re-
place switch
▪ Accelerator
sensor unit:
Internal damage
▪ Accelerator
sensor installa-
tion:
Link, installation
part destroyed,
damaged
Accelerator pedal
position check:
Check the opening
degree of the accel-
erator pedal when
not operated.
If not close to 0%,
installation check or
replace sensor.
▪ SAS/OPS con-
troller:
Controller defect
- Replace
For vehicles with
travel and load
handling control:
Even if the lift is
raised, the idle
speed does not rise.
▪ Lift raise switch
unit:
Open fault
(Switch mounted
incorrectly, in-
ternal damage,
stuck)
▪ Lift raise switch
line:
Disconnection
fault (Harness,
connector)
▪ Switch ground
line:
Disconnection
fault (Harness,
connector)
ON/OFF check with
analyzer Harness check or re-
place switch
▪ Display setting:
Lift idle up dis-
abled, Idle up
speed tuning
value low
Check settings with
option set and tuning
Change
▪ SAS/OPS con-
troller:
Controller defect
- Replace