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Symptom List:
AC PRESSURE SENSOR FAULT (ACTIVE)
AC PRESSURE TOO HIGH
AC PRESSURE TOO LOW
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be AC PRESSURE SENSOR FAULT
(ACTIVE).
When Monitored and Set Condition:
AC PRESSURE SENSOR FAULT (ACTIVE)
When Monitored: With the engine running and the A/C Relay energized.
Set Condition: This DTC will set if the A/C pressure sensor signal voltage at the
Powertrain Control Module (PCM) goes below 0.58 volts for 2.6 seconds or above 4.92 volts.
AC PRESSURE TOO HIGH
When Monitored: When executing the AC Cooldown Test.
Set Condition: If the A/C Pressure Sensor value is above 300 psi.
AC PRESSURE TOO LOW
When Monitored: When executing the AC Cooldown Test.
Set Condition: If the A/C Pressure Sensor value is below 50 psi.
POWERTRAIN CONTROL MODULE (PCM) DTC(S) PRESENT
IMPROPER REFRIGERANT SYSTEM CHARGE
AUTOMATIC TEMPERATURE CONTROL (ATC)
TEST
1
Turn the ignition on.
With the DRBIII , read PCM DTCs.
Does the DRBIII display any DTCs?
Yes → Refer to the Powertrain Diagnostic Information for the related
→ Go To 2
No
POSSIBLE CAUSES
ACTION
symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
493
HEATING & A/C
APPLICABILITY
All
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