1A-90 Engine General Information and Diagnosis:
Step Action Yes No
1 5) If OK, then check the continuity between each terminal
and ground.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Injector continuity
∞ Ω (Infinity)
Are the resistance and continuity OK?
Go to Step 2. Replace the injector
with a new one. Refer to
“Throttle Body
Disassembly and
Assembly” in Section
1D (Page 1D-11).
2 1) Turn the ignition switch ON.
2) Measure the injector voltage between the Y/R wire and
ground.
NOTE
Injector voltage can be detected only for 3
seconds after ignition switch is turned ON.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Tester knob indication
Voltage ( )
Injector voltage
Battery voltage
((+) terminal: Y/R – (–) terminal: Ground)
Is the voltage OK?
• Gr/W wire open or
shorted to ground, or
poor “46” connection
(#1 cylinder side).
• Gr/B wire open or
shorted to ground, or
poor “45” connection
(#2 cylinder side).
• Gr/Y wire open or
shorted to ground, or
poor “44” connection
(#3 cylinder side).
• Gr/R wire open or
shorted to ground, or
poor “43” connection
(#4 cylinder side).
• If wire and
connection are OK,
intermittent trouble or
faulty ECM.
• Recheck each
terminal and wire
harness for open
circuit and poor
connection.
• Replace the ECM
with a known good
one, and inspect it
again. Refer to “ECM
Removal and
Installation” in
Section 1C
(Page 1C-1).
Open circuit in the Y/R
wire.
(A)
I947H1110059-01
(A)
I947H1110060-01
Manuals by Motomatrix / The Solution For Lost Motorcycle Coded Keys
email: info@motomatrix.co.uk / www.motomatrix.co.uk
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