Yamaha Tracer MT09TRAH 2017 Service Manual page 558

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault
Item
code No.
P1602 Malfunction in ECU
internal circuit (mal-
function of ECU
power cut-off function)
P1604 [P1604] Lean angle
P1605 sensor (ground short
circuit detected)
[P1605] Lean angle
sensor (open or
power short circuit
detected)
P1606 [P1606] Intake air
P1607 pressure sensor 2
(ground short circuit
detected)
[P1607] Intake air
pressure sensor 2
(open or power short
circuit detected)
Probable cause of
malfunction
• Open or short cir-
cuit in wire harness
between ECU and
battery.
• Open or short cir-
cuit in wire harness
between ECU and
main switch.
• Blown backup fuse.
• Malfunction in ECU.
[P1604] Low voltage
of the lean angle sen-
sor circuit (0.2 V or
less)
[P1605] High voltage
of the lean angle sen-
sor circuit (4.8 V or
more)
• Open or short cir-
cuit in wire harness
between lean angle
sensor and ECU.
• Defective lean angle
sensor.
• Malfunction in ECU.
[P1606] Low voltage
of the intake air pres-
sure sensor 2 circuit
(0.5 V or less)
[P1607] High voltage
of the intake air pres-
sure sensor 2 circuit
(4.8 V or more)
• Defective coupler
between intake air
pressure sensor 2
and ECU.
• Open or short cir-
cuit in wire harness
between intake air
pressure sensor 2
and ECU.
• Improperly installed
intake air pressure
sensor 2.
• Defective intake air
pressure sensor 2.
• Malfunction in ECU.
9-11
Vehicle symptom
Engine idling speed is
unstable.
Engine idling speed is
high.
Increased exhaust
emissions.
Engine is difficult to
start.
Engine cannot be
started.
Engine is difficult to
start.
Increased exhaust
emissions.
Power on high ground
is insufficient.
Engine idling speed is
unstable.
Fail-safe system
operation
O feedback learning
2
is not carried out.
O feedback learning
2
value is not written.
Engine cannot be
started.
–N is fixed.
Intake air pressure
difference is fixed to 0
[kPa].
Atmospheric pres-
sure is fixed to 101.3
[kPa].
Corrected output
value of atmospheric
pressure sensor is
fixed to 0.
Fuel is not cut off due
to the intake air pres-
sure difference.
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.