Yamaha TMAX 2020 Service Manual page 525

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P1602 Malfunction in ECU
internal circuit (mal-
function of ECU
power cut-off func-
tion).
P1604 [P1604] Lean angle
P1605 sensor: ground
short circuit detect-
ed.
[P1605] Lean angle
sensor: open or
power short circuit.
Probable cause of
malfunction
• 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 starter
relay.
• Blown backup
fuse.
• Malfunction in
ECU.
[P1604] Low voltage
of the lean angle
sensor circuit (0.2 V
or less)
[P1605] High volt-
age of the lean an-
gle sensor circuit
(4.8 V or more)
• Open or short cir-
cuit in wire har-
ness between lean
angle sensor and
ECU.
• Defective lean an-
gle sensor.
• Malfunction in
ECU.
9-51
Vehicle symptom
Engine idling speed
is unstable.
Engine idling speed
is high.
Increased exhaust
emissions.
Engine is difficult to
start.
Engine cannot be
started.
Fail-safe system
operation
feedback learn-
O
2
ing is not carried
out.
O feedback learn-
2
ing value is not writ-
ten.
Cruise control sys-
tem cannot be oper-
ated.
Engine cannot be
started.
Cruise control sys-
tem cannot be oper-
ated.