Yamaha RS90GTZ Service Manual page 339

Fault code table
Fault
Symptom
code No.
No normal signals are
received from the crankshaft
position sensor.
12
Intake air pressure sensor 1
(cylinders #1, #2, and #3):
13
open or short circuit detected.
Intake air pressure sensor 1
(cylinders #1, #2, and #3):
14
hose system malfunction
(clogged or detached hose).
Throttle position sensor: open
or short circuit detected.
15
Stuck throttle position sensor
16
detected.
Coolant temperature sensor:
open or short circuit detected.
21
Intake air temperature sensor:
open or short circuit detected.
22
Intake air pressure sensor 2
(cylinder #1): open or short
25
circuit detected.
Intake air pressure sensor 2
(cylinder #1): hose system
26
malfunction (clogged or
detached hose).
Engine stops when an oil
30
pressure drop is detected.
Malfunction detected in the
primary lead of the cylinder-
#1 ignition coil.
33
Malfunction detected in the
primary lead of the cylinder-
#2 ignition coil.
34
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective crankshaft position sensor.
• Malfunction in pickup rotor (primary sheave drive shaft
assembly).
• Malfunction in ECU.
• Improperly installed crankshaft position sensor.
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective intake air pressure sensor 1.
• Malfunction in ECU.
• Intake air pressure sensor 1 hoses are detached, clogged,
kinked, or pinched.
• Defective intake air pressure sensor 1.
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective throttle position sensor.
• Malfunction in ECU.
• Improperly installed throttle position sensor.
• Defective throttle position sensor.
• Improperly installed throttle position sensor.
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective coolant temperature sensor.
• Malfunction in ECU.
• Improperly installed coolant temperatue sensor.
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective intake air temperature sensor.
• Malfunction in ECU.
• Improperly installed intake air temperatue sensor.
• Coupler defective between sensor – ECU.
• Open or short circuit in wire harness.
• Defective intake air pressure sensor 2.
• Malfunction in ECU.
• Intake air pressure sensor 2 hose is detached, clogged,
kinked, or pinched.
• Defective intake air pressure sensor 2.
• Oil pressure dropped.
• Defective oil pressure switch.
• Coupler defective between cylinder-#1 ignition coil – ECU.
• Open or short circuit in wire harness.
• Open or short circuit in ignition system sub-wire harness.
• Malfunction in cylinder-#1 ignition coil.
• Malfunction in ECU.
• Malfunction in a component of ignition system.
• Coupler defective between cylinder-#2 ignition coil – ECU.
• Open or short circuit in wire harness.
• Open or short circuit in ignition system sub-wire harness.
• Malfunction in cylinder-#2 ignition coil.
• Malfunction in ECU.
• Malfunction in a component of ignition system.
7-12
FI
Diagnostic
code No.
—
d:03
d:03
d:01
d:01
d:06
d:05
d:04
d:04
—
d:30
d:31