FI SYSTEM 4-31
“C11” CMP SENSOR CIRCUIT MALFUNCTION
DETECTED CONDITION POSSIBLE CAUSE
No CMP sensor signal for 4 seconds at engine • Metal particles or foreign material being
cranking. attached on the CMP sensor and rotor tip.
• CMP sensor circuit open or short.
• CMP sensor malfunction.
• ECM malfunction.
INSPECTION
• Lift and support the fuel tank with a proper stay. (!4-48)
Turn the ignition switch OFF.
Check the CMP sensor coupler for loose or poor contacts.
If OK, then measure the CMP sensor peak voltage.
Insert the copper wires to the CMP sensor coupler and
crank the engine a few seconds or start the engine, and
measure the peak voltage.
" CMP sensor peak voltage: More than 3.7 V
(+Y/W – - B/Br)
# 09900-25008: Multi circuit tester
$ Tester knob indication: Voltage (
%%
%%
%)
No Replace the CMP sensor
with a new one.
Ye s
Remove the CMP sensor.
If the metal particles or foreign material is attached on the
CMP sensor and rotor tip, signal not flow correctly to the
ECM. Clean the CMP sensor and rotor tip with a spray-
type carburetor cleaner and blow dry with compressed
air and also change the engine oil if necessary.
No
Loose or poor contacts on the CMP
sensor coupler or ECM coupler.
Replace the CMP sensor with a
new one.
Ye s
O/W, Y/W or B/Br wire open or shorted to ground, or poor B or
X 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. (! 4-4)
Replace the ECM with a new one,
and inspect it again.
2
1
ECM coupler
1
Peak volt
adapter
2
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