Mitsubishi 3000GT 1991, Service Manual

Page: 1122 / 1146

FULL AUTO AIR CONDITIONER
Troubleshooting
TROUBLESHOOTING
TROUBLESHOOTING PROCEDURE
Check that the air ducts and rods are not off.
(2) Check that connectors are properly connected and fuses are not blown.
(3) Using an analog voltmeter or multi-use tester, check diagnosis outputs. If failure code is being output,
check the failing system and repair as necessary. (Refer to Diagnosis Display Patterns and Codes on
(4) If the diagnosis outputs are normal, check for terminal voltage or continuity with a circuit tester according
to the troubleshooting chart by symptom. (Refer to control unit terminal voltages on 52.)
(5) In carrying out the troubleshooting procedure, first look up the Troubleshooting Quick-Reference Chart to
know the inspection items and then start the detailed in the following pages.
(6) When checking components, be sure to disconnect the connectors first.
TROUBLESHOOTING QUICK-REFERENCE CHART
T
4
.
6
3
6
3
a
2
,
,
,
3
Symptom
Inspection item
7
5
0
4
Air conditioner does not
operate when the ignition
not raise even the air
conditioner is operating
air coming out).
3
Interior temperature does
not lower even the air
conditioner is operating
(No cold air coming out).
4
Blower motor does not rotate.
5 Blower motor does not stop
rotating.
6 Inside/outside-air selector
damper does not operate.
7 Outlet selector damper does
not operate.
8 Condenser fan does not
operate when the air
conditioner is activated.
9 Air-conditioner graphic display
does not function correctly.
Set temperature returns to
25°C (122°F) when the ignition
switch is turned ON and OFF.
NOTE
(1)
(2)
0 indicates the component requiring inspection. (Numbers in 0 are the priority order.)
Use an analog voltmeter or multi-use tester to check the control unit.
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