MPI <4G9> -
Troubleshooting
13A-116
OK
Check the trouble symptoms.
Intermittent malfunction
(Refer to GROUP 00 - 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-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
NG
Repair
NG
NG
Repair
NG
Repair
(2) NG
Measure at engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector
B-34 <M/T>, B-94 <A/T>.
D
Measure the voltage at the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> terminal.
D
Disconnect connector A-70.
D
Ignition switch: ON
D
The voltage between terminal 2
and earth
OK:
4.8 - 5.2 V
OK
Check the following connector:
B-34 <M/T>, B-94 <A/T>
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 A-70.
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:
4.8 - 5.2 V
(3) The resistance between terminal
1 and earth
OK:
2
W
or less
(1) NG
Check the following connectors:
A-10, B-13
NG
Repair
Replace the camshaft position
sensor.
Check the trouble symptoms.
OK
NG
Repair
OK
Check the harness wires between the camshaft position sensor connector and the
engine-ECU <M/T> or engine-A/T-ECU <A/T>, the camshaft position sensor connector
and the engine control relay, and the camshaft position sensor connector and earth.
Then, repair if necessary.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the harness wire between the
intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Repair
OK
Use an analyzer to measure the
output waveform at camshaft position
sensor connector A-70.
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.13A-166 (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
NG
Check the camshaft position sensing
cylinder.
NG
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Replace
Check the following connector:
A-70
Check the following connector:
B-34 <M/T>, B-94 <A/T>
Check the following connector:
A-70