C12" Ckp Sensor Circuit Malfunction - Suzuki DL1000 Service Manual

"C12" CKP SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
No CKP sensor signal for 3 seconds at engine
cranking.
INSPECTION
• Remove the left frame cover. ( : 6-5)
1
Turn the ignition switch OFF.
Check the CKP sensor coupler for loose or poor contacts.
If OK, then measure the CKP sensor resistance.
Disconnect the CKP sensor coupler and measure the
resistance.
; CKP sensor resistance: 130 – 240 Ω
If OK, then check the continuity between each terminal
and ground.
; CKP sensor continuity: ∞Ω (Infinity)
z 09900-25008: Multi circuit tester
t Tester knob indication: Resistance (Ω)
Yes
2
Disconnect the CKP sensor coupler.
Crank the engine a few seconds with the starter motor,
and measure the CKP sensor peak voltage at the coupler.
; CKP sensor peak voltage: More than 3.7 V
Repeat the above test procedure a few times and
measure the highest peak voltage.
If OK, then measure the CKP sensor peak voltage at the
ECM terminals. (N+/N– or
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
No
Yes
6 Blue or Green wire open or shorted to ground, or poor
connection. ( : 4-22)
If wire and connection are OK, intermittent trouble or faulty ECM.
Recheck each terminal and wire harness for open circuit and
poor connection. ( : 4-5)
(Blue – Green)
Blue – Ground
( )
Green – Ground
No
Replace the CKP sensor
with a new one.
(Blue – Green)
2 6
/ )
Loose or poor contacts on the CKP
sensor coupler or ECM coupler.
Clean the CKP sensor and rotor tips
or replace the CKP sensor with a
new one.
Replace the ECM with a new one,
and inspect it again.
POSSIBLE CAUSE
• Metal particles or foreign material being attached
on the CKP sensor and rotor tip.
• CKP sensor circuit open or short.
• CKP sensor malfunction.
• ECM malfunction.
1
Ω
2
Peak volt adapter Peak volt adapter Peak volt adapter
2
26
or
FI SYSTEM 4-33
Ω
V
30
ECM couplers