Mitsubishi 3000GT Service Manual page 243

HARNESS INSPECTION
A Harness side
connector
A Harness side
On-Vehicle Inspection of MFI
MULTIPORT
FUEL INJECTION - Components
Measure the power supply volt-
age of the heated oxygen sensor.
Connector: Disconnected
l
Ignition switch: ON
l
Battery voltage
module harness short-circuit to ground between
the engine control module and the
heated oxygen sensor.
Heated oxygen sensor con-
l
nector: Disconnected
Engine control module con-
l
Check for continuity of the ground
circuit.
Connector: Disconnected
l
Repair the
harness.
(A3 - MFI
relay)
Repair the
harness.
(Al -56)
Repair the
(A4 - Ground) /