12" Ckp Sensor Circuit Malfunction - Suzuki RM-z450 Owner's Service Manual

12-25 FI SYSTEM DIAGNOSIS

"12" CKP SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
The signal does not reach ECM for 1 sec. or more,
after receiving the IAP sensor input signal.
CKP sensor
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle pointed tester probe to prevent the terminal damage or terminal bend.
INSPECTION
Step 1
1) Stop the engine.
2) Check the CKP sensor coupler for loose or poor contacts.
If OK, then measure the CKP sensor resistance.
3) Disconnect the CKP sensor coupler and measure the resis-
tance.
# CKP sensor resistance: 80 – 120 Ω
• Metal particles or foreign material being stuck on
• CKP sensor circuit open or short.
• CKP sensor malfunction.
• ECM malfunction.
G
R
CAUTION
(Green – Red)
POSSIBLE CAUSE
the CKP sensor and rotor tip.
G/W
BI
1
1
ECM
CKP
CKP