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HEATING & A/C
Symptom List:
*A/C STATUS INDICATOR FLASHING - MTC
*RECIRC STATUS INDICATOR FLASHING - MTC
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be *A/C STATUS INDICATOR
FLASHING - MTC.
AC COOLDOWN TEST NEEDS TO BE RUN
HVAC DOOR RECALIBRATION NEEDS TO BE RUN
TEST
1
Turn the ignition on.
Which status indicator is flashing on the A/C-Heater Control Module?
A/C Status Indicator
RECIRC Status Indicator
2
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°F) to test A/C
operation.
NOTE: The A/C status indicator will flash twice per second to indicate that
the AC Cooldown Test needs to be run.
NOTE: The A/C status indicator will stop flashing twice per second if either
the AC Cooldown Test returns passed, or if any button on the control is
pressed, or if the ignition is cycled and the odometer shows greater than
eight miles.
NOTE: The Power and A/C status indicators will flash alternately while the
AC Cooldown Test is running.
Start the engine.
Turn the Blower control to the high speed position.
With the DRBIII in HVAC, System Tests, actuate the AC Cooldown Test.
Does the DRBIII display: Cooldown Test Passed?
Yes → Test Complete.
→ Return to the symptom list and choose the symptom(s).
No
POSSIBLE CAUSES
ACTION
Go To 2
Go To 3
Perform BODY VERIFICATION TEST - VER 1.
558
APPLICABILITY
All
All
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