13A-12
MPI – TROUBLESHOOTING
Continued from the previous page
Check connectors B-19X & C-23
Check the intake cam position
sensing cylinder
Check that the problem has been
solved
Replace the intake cam position
sensor
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Replace the intake cam position
sensing cylinder
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Inspect the harness between the
intake cam position sensor and
the engine ECU
• Check if the output wire is
damaged
Inspect the harness between the
intake cam position sensor and
the engine control relay
• Check if the power wire is
damaged
Measurement of the output wave
at the intake cam position
sensor connector B-33 (using an
oscilloscope)
• Use test harness (MB991709),
connect it to the connector, and
take measurements at the pick-
up harness component
• Engine: idling
•Voltage across earth at 2
OK: An output wave as described
on P.13A-25 (Main points for
oscilloscope testing) is
produced, with the maximum
value in excess of 4.8V and
the minimum value less than
0.6V. There should be no
noise in the output wave form.
Replace engine ECU
Check that the problem has been
solved
Check connectors C-49 & C-50
OK
OK
OK
NG
NG
OK
OK
OK
OK
OK
NG
NG
Repair
NG
Repair
NG
Repair
NG
NG
OK
Repair
