RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
With the DRBIII(R) in HVAC, select System Tests and then select AC Cooldown test. Allow one minute for the test to complete. One or more
status messages will display on the DRBIII(R) after running the AC Cooldown Test. These messages will clear after paging back out of this test
function. Therefore, it is important to note all messages before doing so.
Q: Does the DRBIII(R) display a status message that indicates a fault has occurred?
Yes, Blower Not On High
Diagnose and repair the fault. Refer to Blower Not On High for the diagnostic test procedure.
Yes, Cooldown Test Sensor Failure
Diagnose and repair the fault. Refer to Cooldown Test Sensor Failure for the diagnostic test procedure.
Yes, Cooldown Time Excessive Fault
Diagnose and repair the fault. Refer to Cooldown Time Excessive Fault for the diagnostic test procedure.
Yes, Cooldown Test Too Cold To Start
Diagnose and repair the fault. Refer to Cooldown Test Too Cold To Start for the diagnostic test procedure.
NO: Test Complete. Perform BODY VERIFICATION TEST - VER 1. See: Powertrain Management/Computers and Control Systems/Testing
and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Body Verification Test
A/C Status Indicator Will Not Illuminate - A/C Heater Control Without EBL SW
A/C STATUS INDICATOR WILL NOT ILLUMINATE - A/C HEATER CONTROL WITHOUT EBL SW
Theory of Operation
Failing recalibration will prevent the A/C status indicator from operating but still allows the A/C mode switch to function normally. This test verifies if
the status indicator is inoperable due to either a recalibration failure or a fault with the status indicator.
POSSIBLE CAUSES
-
HVAC door recalibration failed
-
A/C Heater control
Diagnostic Test
1. PERFORM THE HVAC DOOR RECALIBRATION
Turn the ignition on.
With the DRBIII(R) in HVAC, select System Tests and then select HVAC Door Recalibration.
Allow the test to run to completion before proceeding.
Q: Does the DRBIII(R) display: Recalibration Test Failed?
YES: Diagnose and repair the fault(s).
NO: Replace the A/C Heater Control. Perform BODY VERIFICATION TEST - VER 1. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests/Body Verification Test
Actuator Circuit Test Diagnostics (Dual-Zone)
ACTUATOR CIRCUIT TEST DIAGNOSTICS (DUAL-ZONE)
