Mitsubishi 3000GT 1991 Service Manual page 121

FUEL SYSTEM
READ OUT OF MALFUNCTION CODE
Precautions for Operation
possible. Be sure to check the battery for voltage and other
conditions before starting the test.
(2) Diagnosis item is erased if the battery or the engine control
unit connector is disconnected. Do not disconnect the
battery before the diagnosis result is completely read.
Using Multi-Use Tester
(3) Turn the ignition switch OFF and then turn it ON.
(4) Erase the malfunction code.
(5) Recheck that a normal code is output.
Using Voltmeter
output terminal of the diagnosis connector and ground
terminal.
(2) Turn on the ignition switch.
(3) Read the diagnosis output pattern from the voltmeter and
record it.
(4) Referring to the diagnosis chart, repair the faulty part.
(5) Erase the malfunction code using the following procedure.
terminal for 10 seconds or more and then reconnect it.
code to check that a normal code is output.
Diagnosis by DIAGNOSIS 2 MODE
of the engine control unit to DIAGNOSIS 2 MODE.
(2) Road test the vehicle.
(3) Read the diagnosis code in the same manner as "READ
OUT OF MALFUNCTION CODE" and repair the malfunc-
tioning part.
(4) Remove the multi-use tester.
NOTE
Removal of the multi-use tester .will erase all the self-'
diagnosis malfunction codes in the engine control unit and
changeover the diagnosis mode from DIAGNOSIS 2 MODE
to DIAGNOSIS 1 MODE.
TSB Revision