Yamaha XSR 900 2022 Service Manual page 474

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P1601 Sidestand switch:
open or short circuit
in wire harness of
the ECU is detect-
ed. Normal signal is
not received from
the sidestand
switch.
P1602 Malfunction in ECU
internal circuit (mal-
function of ECU
power cut-off func-
tion).
Probable cause of
malfunction
• Defective coupler
between relay unit
and ECU.
• Open or short cir-
cuit in wire har-
ness between
relay unit and
ECU.
• Defective coupler
between sidestand
switch and relay
unit.
• Open or short cir-
cuit in wire har-
ness between
sidestand switch
and relay unit.
• Defective side-
stand switch.
• Malfunction in
ECU.
• Open or short cir-
cuit in wire har-
ness between
ECU and battery.
• Open or short cir-
cuit in wire har-
ness between
ECU and main
switch.
• Blown backup fuse
2.
• Malfunction in
ECU.
9-68
Vehicle symptom
Engine cannot be
started.
Engine idling speed
is unstable.
Engine idling speed
is high.
Increased exhaust
emissions.
Engine is difficult to
start.
Fail-safe system
operation
Engine is forcefully
stopped (the injector
output is stopped).
Cruise control fixed
to OFF.
O feedback learn-
2
ing is not carried
out.
O feedback learn-
2
ing value is not writ-
ten.
Cruise control fixed
to OFF.