Cannot Travel (Ops); Cannot Perform Material Handling Except For Lift Up And Attachments - Toyota 8FGU15 Repair Manual

8 TROUBLESHOOTING
Phenomenon on
Control type
vehicle
Cannot travel.
OPS
For cowl lever
vehicles:
Cannot perform ma-
terial handling ex-
cept for lift up and
attachments
Malfunction area
Checking method
and mode
▪ Fuse:
-
Shift fuse blown
▪ Forward travel
interrupt relay
unit:
Open fault (in-
ternal damage,
welded)
Turn the forward and
▪ Reverse travel
reverse travel inter-
interrupt relay
rupt relays OFF and
unit:
operate forward and
reverse travel using
Open fault (in-
an active test.
ternal damage,
welded)
▪ Relay secondary
side line:
Open fault (Har-
ness, connector)
▪ Seat switch unit:
Open fault (in-
ternal damage)
ON/OFF check with
▪ Seat switch line
analyzer
(Signal, ground):
Disconnection
fault (Harness,
connector)
▪ Direction lever
unit:
Open system
fault (internal
damage)
ON/OFF check with
analyzer
▪ Direction lever
signal line:
Disconnection
fault (Harness,
connector)
▪ SAS/OPS con-
troller, OPS con-
-
troller:
Controller defect
Check the har-
▪ Power harness:
nesses, connectors
and fuses on the
Wire breakage,
power line between
short circuit or
the battery and the
leakage (Har-
controller while re-
ness, connector,
ferring to the system
fuse)
circuits diagram.
▪ SAS/OPS con-
troller:
-
Internal damage
8-185
Corrective action
Check for blown
fuse
If forward travel can-
not be performed,
replace the forward
travel interrupt relay.
If reverse travel can-
not be performed,
replace the reverse
travel interrupt relay.
Or perform a har-
ness check.
Harness check or re-
place switch
Harness check or re-
place switch
Replace
Check the har-
nesses, and repair
or replace them. Re-
place the fuses.
Replace the control-
ler.
8