Yamaha Tenere 700 2020, Service Manual

Page: 385 / 472

FUEL INJECTION SYSTEM
8-74
Fault code No. P1602
Fault code No. P1602
Item
Malfunction in ECU internal circuit (malfunction of ECU power cut-
off function).
Fail-safe system
Able/Unable to start engine
Able/Unable to drive vehicle
Diagnostic code No. —
Tool display —
Procedure —
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Installed condition of battery
leads. Check the installed con-
dition of the battery and battery
leads (loose bolts). Improperly installed battery or
battery leads
→
Reinstall or re-
place the battery leads.
Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 2.
2 Connection of starter relay
(main fuse) coupler. Check the
locking condition of the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 3.
3 Check the fuel injection system
fuse. Blown fuse
→
Replace the fuse
or wire harness.
Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 4.
4 Wire harness continuity be-
tween battery and ECU coupler. Open or short circuit
→
Replace
the wire harness.
Between battery terminal and
starter relay (main fuse).
red–red
Between starter relay (main
fuse) and fuel injection system
fuse.
red–red
Between fuel injection system
fuse and ECU coupler.
red/black–red/black
Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 5.