Mitsubishi MOTORS Lancer 2005, Workshop Manual Supplement

Page: 29 / 109

MPI <4G63>
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Troubleshooting
13D-24
Code No. 23 Camshaft position sensor system Probable cause
Range of Check
D
During engine cranking and driving
Set Condition
D The sensor output voltage does not change for 4 seconds (no pulse signal
input).
D Malfunction of the camshaft position sensor
D
Open or short circuit in the camshaft position
sensor circuit or loose connector contact.
D Malfunction of the engine-A/T-ECU
NG
Replace the engine-A/T-ECU.
OK
Check the harness wires between the camshaft position sensor connector and the
engine-A/T-ECU, the camshaft position sensor connector and the engine control relay,
and the camshaft position sensor connector and earth. Then, repair if necessary.
NG
Repair
NG
Check the following connectors:
B-16X, C-124
Check the trouble symptoms.
OK
Check the trouble symptoms.
NG
Replace the engine-A/T-ECU.
OK
Check the trouble symptoms. Intermittent malfunction
(Refer to GROUP 00
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Points to Note for Intermittent Malfunctions.)
OK
Check the harness wire between the
camshaft position sensor connector
and earth, and repair if necessary.
(3) NG
OK
Check the harness wire between the
camshaft position sensor connector
and the engine-A/T-ECU, and repair if
necessary.
NG
Repair
NG
NG
Repair
NG
Repair
(2) NG
Measure at the engine-A/T-ECU
connector C-124.
D
Measure the voltage at the
engine-A/T-ECU terminal.
D Disconnect connector B-107.
D Ignition switch: ON
D The voltage between terminal 56
and earth
OK: 4.9
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5.1 V
OK
Check the following connector:
C-124
OK
Check the harness wire between the
camshaft position sensor connector
and the engine control relay, and
repair if necessary.
OK
Measure at camshaft position sensor
connector B-107.
D
Disconnect the connector and
measure at the harness side.
(1) The voltage between terminal 3
and earth
(Ignition switch: ON)
OK: System voltage
(2) The voltage between terminal 2
and earth
(Ignition switch: ON)
OK: 4.9
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5.1 V
(3) The resistance between terminal
1 and earth
OK: 2
:
or less
(1) NG
Check the following connector:
B-16X
NG
Repair
Replace the camshaft position
sensor.
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU.
NG
Repair
OK
Use an analyzer to measure the
output waveform at camshaft position
sensor connector B-107.
D Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
D
Engine: Idling
D The voltage between terminal 2
and earth
OK: A normal waveform should
be displayed as described
on P.13D-81 (Inspection
Procedure Using an Ana-
lyzer), its maximum value
should be 4.8 V or more,
and its minimum value
should be 0.6 V or less
with no noise in waveform.
NG
Check the camshaft position sensing
cylinder.
NG
Replace
Check the following connector:
B-107
Check the following connector:
C-124
OK