GDI ± Troubleshooting
13A-21
Code No.23 Camshaft position sensor system Probable cause
Range of check
D While engine is cranking or running
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal is
being input).
D Malfunction of the camshaft position sensor
D Open circuit or short-circuited harness wire of the
camshaft position sensor circuit
D Malfunction of the engine-ECU
OK
Replace the engine-ECU.
NG
Repair
NG
Repair
OK
Replace the engine-ECU.
(3) NG
Check the harness wire between the
camshaft position sensor and the earth,
and repair if necessary.
NG
Repair
NG
Replace the camshaft position sensor.
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the camshaft position
sensor.
OK
Check trouble symptom.
(2) NG
Check the following connector:
C-18
OK
Check the following connector:
A-66
Measure at the camshaft position sen-
sor connector A-66.
D Connect the connector (Use the
test harness MD991709)
D Voltage between 2 and earth
(Engine: Cranking)
OK: 0.3 ± 3.0 V
D Voltage between 2 and earth
(Engine: Idling)
OK: 0.5 ± 3.5 V
NG
Measure at the camshaft position sen-
sor connector A-66.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 3 and earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between 2 and earth
(Ignition switch: ON)
OK: 4.8 ± 5.2 V
(3) Continuity between 1 and earth
OK: Continuity
(1) NG
Check the harness wire between the
camshaft position sensor and the en-
gine control relay, and repair if neces-
sary.
Check the following connector:
A-36
OK
Repair
NG
Check trouble symptom.
NG
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