Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 138 / 1164

GDI <4G6> -
Troubleshooting
13A-20
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).
or
D Abnormal pulse signal pattern is output.
D Malfunction of the camshaft position sensor
D Open circuit or short-circuited harness wire of the
camshaft position sensor
D Malfunction of 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.
OK
Replace the engine-ECU.
NG
Repair
NG
Replace the camshaft position sensor.
OK
Check trouble symptom.
OK
Check the following connector:
A-78
NG
Check the harness wire between the
engine-ECU and the camshaft position
sensor.
OK
Check trouble symptom.
(2) NG
Check the following connector:
B-51
Measure at the camshaft position sen-
sor connector A-78.
D Connect the connector (Use the
test harness MB991709)
D Voltage between 2 and earth
(Engine: Cranking)
OK:
0 - 4.0 V
D Voltage between 2 and earth
(Engine: Idling)
OK:
0.5 - 2.0 V
NG
Measure at the camshaft position sen-
sor connector A-78.
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 theengine
control relay, and repair if necessary.