12-30 FI SYSTEM DIAGNOSIS
4) If OK, then check the continuity between each terminal and
ground.
CKP sensor resistance:
∞
Ω
(Infinity)
(Green – Ground)
(Red – Ground)
09900-25008: Multi circuit tester set
Tester knob indication: Resistance (
Ω
)
Are the resistance and continuity OK?
Step 2
1) Measure the CKP sensor peak voltage by depressing the kick
starter lever several times forcefully.
2) Repeat the above test procedure a few times and measure
the highest peak voltage.
CKP sensor peak voltage: 2.8 V and more
(
+
Green –
-
Red)
1
Peak volt adaptor
09900-25008: Multi circuit tester set
Tester knob indication: Voltage (
)
.
Is the voltage OK?
YES
Go to step 2.
NO
Replace the CKP sensor with a new one.
YES
• G/W or BI wire open or shorted to ground.
• Loose or poor contacts on the CKP sensor cou-
pler or ECM coupler (terminal
3
or
9
).
• If wire and connection are OK, intermittent trou-
ble 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.
NO
• Inspect that metal particles or foreign material
stuck on the CKP sensor and rotor tip.
• If there are no metal particles and foreign mate-
rial, then replace the CKP sensor with a new
one.
1
2
V
ECM coupler (Harness side)
2
