Mitsubishi 3000GT Service Manual page 1289

FULL AUTO AIR CONDITIONING - Ttwblhooting
When using the MUT
When using the MUT-II
<From 1994 models>
With voltmeter
meter _---.
Diagnostic output ,$$!l$!?
ON-BOARD DIAGNOSTIC CHECKING
The following method can be used for checking the diagnosis.
When using the scan tool [Multi-use tester (MUT) <Up
to 1993 models> or MUT-II <All models>]
(1) Connect the scan tool to the data link connector to read
out the diagnostic trouble codes.
On vehicles up to 1993 model, connect the scan tool
using the attached adaptor harness-
Caution
Turn off the ignition switch beforehand whenever the
scan tool is connected or disconnected.
(2) Repair the faulty spots by referring to diagnostic chart.
(3) Erase the failure code.
(4) Check the system again.
When using the voltmeter
(1) Connect an analog voltmeter across the diagnostic output
terminal (7) and ground terminal (6) of the data link connec-
tor.
(2) Turn ON the ignition switch.
(3) According to the voltmeter pointer deflection, read the
on-board diagnostic pattern.
(4) Referring to the diagnostic chart, repair the faulty spot.
(5) Erase the failure code by the following procedure.
1) Turn OFF the ignition switch.
2) Disconnect the battery cable from a battery terminal
and leave it disconnected for 10 seconds or more;
then, reconnect the cable.
3) Turn ON the ignition switch and read the diagnostic
trouble code to check that the correct code is being
output.
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