12-18 FI SYSTEM DIAGNOSIS
TP SENSOR ADJUSTMENT
1. Connect a 12 volt battery using the battery lead wire to ser-
vice coupler. (
12-19)
36890-28H00: Battery lead wire (option)
2. Loosen the screw
1
with the special tool.
3. Turn the TP sensor
2
.
4. Insert the needle-point probes to the TP sensor lead wire cou-
pler
3
.
5. Adjust the TP sensor
2
until the output voltage comes within
the specified value.
6. Then, tighten the screw
1
with the special tool to fix the TP
sensor
2
.
TP sensor output voltage: Approx. 0.6 V
(
+
Y –
-
B/Br)
09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
09930-11950: Torx wrench (T25H)
7. Check the engine idle speed. (
2-24)
FAIL-SAFE FUNCTION
FI system is provided with fail-safe function to allow the engine to start and the motorcycle to run in a mini-
mum performance necessary even under malfunction condition.
The engine can start and can run even if the above signal is not received from each sensor. But, the engine
running condition is not complete, providing only emergency help (by fail-safe circuit). In this case, it is nec-
essary to bring the motorcycle to the workshop for complete repair.
V
ITEM
FAIL-SAFE MODE
STARTING
ABILITY
RUNNING
ABILITY
IAP sensor
Intake air pressure is fixed to 106
kPa (795 mmHg).
“YES”
“YES”
TP sensor
The throttle opening is fixed to close
position.
Ignition timing is also fixed.
“YES”
“YES”
ECT sensor
Engine coolant temperature value is
fixed to 80 °C (176 °F).
“YES”
“YES”
IAT sensor
Intake air temperature value is fixed
to 15 °C (86 °F).
“YES”
“YES”
Gear position signal
Gear position signal is fixed to 1st
gear.
“YES”
“YES”
