MTC 35

35-FAILED COOL DOWN (MTC)

WHEN MONITORED
When the Cooldown Test is executed.

SET CONDITION
If the A/C system is unable to lower the evaporator temperature 11.11° C (20° F).

POSSIBLE CAUSES
- Prerequisites not met before running the cooldown test
- Another related system not functioning correctly
- Powertrain system faults present

NOTE: This DTC will display as active if the ignition is not cycled after running the Cooldown Test. Otherwise, it will display as stored until cleared.

DIAGNOSTIC TEST

1. VERIFY THAT ALL OF THE COOLDOWN TEST PREREQUISITES WERE MET
Review the list of Cooldown Test prerequisites.
- DTC 31 or 32 must not be active.
- The refrigerant system must be adequately charged.
- The blower motor must operate correctly in all speeds.
- The work area ambient temperature must be above 18.3° C (65° F).
- The evaporator temperature must be above 18.3° C (65° F).
- The A/C compressor must be turned off.

Q: Were all of the prerequisites met before running the Cooldown Test?

YES: Go To 2
NO: Run the Cooldown Test again after all of the prerequisites are met. Then, if DTC 35 is still present, Go To 2. Otherwise, Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK FOR DTCs IN THE PCM
With the scan tool, select PCM.

Q: Are any DTCs present in the PCM?

YES: Diagnose and repair the DTC(s). Refer to Computers and Control Systems/Testing and Inspection for PCM DTCs.
Run the Cooldown Test again after the repair is complete.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Refer to the Cooldown Test related diagnostic information and testing procedures. Run the Cooldown Test again after the repair is complete.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test