Engine General Information and Diagnosis: 1A-24
2 1) Crank the engine a few seconds with the starter motor,
and measure the CKP sensor peak voltage at the
coupler.
CKP sensor peak voltage
4.5 V and more
(Positive terminal: G – Negative terminal: Bl)
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
2) Repeat the above test procedures a few times and
measure the highest peak voltage.
Is the voltage OK?
• G/W or Bl wire open
or shorted to ground.
• Loose or poor
contacts on the CKP
sensor coupler or
ECM coupler
(terminal (2) or (9)).
Refer to “Terminal
Alignment of ECM
Coupler (Harness
Side) (Page1A-5)”.
• 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.
• Inspect that metal
particles or foreign
material stuck on the
CKP sensor and rotor
tip.
• If there are no metal
particles and foreign
material, then replace
the CKP sensor with
a new one.
Step Action Yes No
Peak
volt
adaptor
V
(A)
I705H1110035-04
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