Yamaha FZ6-ST Supplementary Service Manual page 386

Fault code No. 16
Used diagnostic code No. 01 (throttle position sensor)
Order Inspection operation item and probable
cause
1 Installed condition of throttle position
sensor.
2 Defective throttle position sensor
3 When detecting fault code No. 15
Fault code No. 19
Used diagnostic code No. 20 (sidestand switch)
Order Inspection operation item and probable
cause
1 Connected state of connector
Main wiring harness ECU coupler
(No. 4 pin)
2 Open or short circuit in wiring harness
and / or sub lead.
Fault code No. 21
Used diagnostic code No. 06 (coolant temperature sensor)
Order Inspection operation item and probable
cause
1 Installed condition of sensor
2 Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the
coupler.
3 Open or short circuit in wiring harness
and / or sub lead.
4 Defective coolant temperature sensor.
FUEL INJECTION SYSTEM
Symptom Stuck throttle position sensor detected.
Operation item and countermeasure
Check the installed area for looseness or pinching.
Check that it is installed in the specified position.
Refer to "THROTTLE BODIES" section.
Execute the diagnostic mode (code No. 01)
Replace if defective.
Refer to "THROTTLE BODIES" section.
Refer to "Fault code No. 15".
Symptom Open circuit in the input line of ECU No. 4 terminal is detected.
Operation item and countermeasure
Execute the diagnostic mode (code No. 20)
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Repair or replace if there is an open circuit.
Sidestand switch signal input line of ECU coupler
black / red
Symptom Open or short circuit is detected from the coolant temperature sensor.
Operation item and countermeasure
Check the installed area for looseness or
pinching.
If there is a malfunction, repair it and connect it
securely.
Coolant temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler
black / blue - black / blue
green / white - green / white
Execute the diagnostic mode (code No. 06)
Replace if defective.
Refer to "COOLING SYSTEM" in chapter 8.
7-16
FI
Reinstatement
method
Reinstated by
starting the
engine,
operating it ti it
at idle, and
then racing it.
Refer to "Fault
code No. 15".
Reinstatement
method
If the transmis-
sion is in gear,
it is reinstated
by retracting
the sidestand.
If the transmis-
sion is in neu-
tral, it is rein- tral it is rein-
stated by re-
connecting the
wiring.
Reinstatement
method
Reinstated by
turning the
main switch
ON.