FI SYSTEM/ CVT SYSTEM 6-27
“C11” CMP SENSOR CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
No CMP sensor signal for more than 2 seconds
after receiving the starter signal.
• Metal particles or foreign material being attached
on the CMP sensor and rotor tip.
• CMP sensor circuit open or short.
• CMP sensor malfunction.
• ECM malfunction.
1
Peak volt
adaptor
ECM couplers
1
2
• Remove the maintenace lid. (
:
9-13)
1
2
Ye s
Ye s
No
No
Replace the CMP sensor
with a new one.
Loose or poor contacts on the CMP
sensor coupler or ECM coupler.
Replace the CMP sensor with a
new one.
B/Y or Br wire open or shorted to ground, or poor
[
or
d
connection.
If wire and connection are OK, intermittent trouble or faulty ECM.
Recheck each terminal and wire harness for open circuit and
poor connection.
Turn the ignition switch OFF.
Check the CMP sensor coupler for loose or poor contacts.
If OK, then measure the CMP sensor resistance.
Disconnect the CMP sensor coupler
1
and measure the
resistance.
;
CMP sensor resistance: 0.9 – 1.7 kΩ
(B/Y – Brown)
If OK, then check the continuity between each terminal
and ground.
Disconnect the CMP sensor coupler.
Crank the engine a few seconds with the starter motor,
and measure the CMP sensor peak voltage at the sensor.
;
CMP sensor peak voltage: More than 0.5 V
(
+
B/Y –
-
Br)
Repeat the above test procedure a few times and
measure the highest peak voltage.
If OK, then measure the CMP sensor peak voltage at the
ECM terminals. (
[
/
d
)
z
09900-25008: Multi circuit tester
u
Tester knob indication: Voltage (
-
)
Replace the ECM with a new one,
and inspect it again.
V
Ω
Ω
(
)
;
CKP sensor continuity: ∞ Ω (Infinity)
B/Y – Ground
Br – Ground
z
09900-25008: Multi circuit tester
t
Tester knob indication: Resistance (Ω)
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