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Step2
1) Disconnect the CKP sensor coupler.
2) Crank the engine a few seconds with the starter motor, and
measure the CKP sensor peak voltage at the coupler.
_ CKP
sensor
peak voltage: 0.5 V and more
«(±)
Black - 8 Green)
3) 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.
(@l-
@)
igh
09900-25008: Multi
circuit
tester set
QWJ
Tester
knob
indication: voltage
(=-=-:)
Is the voltage OK?
•
Black or Green wire open or shorted to ground,
or poor
@l or @ connection.
•
If wire and connection are OK, intermittent trou-
YES
ble or faulty ECM.
•
Recheck each terminal and wire harness for
open circuit and poor connection.
•
Loose or poor contacts on the CKP sensor cou-
NO pier or ECM coupler.
•
Replace the CKP sensor with a new one.
FI
SYSTEM
DIAGNOSIS
4-29
ECM couplers