Grand Caravan V6-3.3L VIN R (2005)
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checks A/C system performance based on evaporator temperature sensor input.
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will not run if ambient temperature is below 12.7° C (55° F).
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will pass if the evaporator temperature drops 6.7° C (20° F) within two minutes of starting the test.
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faults display on the DRBIII(R) as test messages only after running the test.
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faults will not display on the DRBIII(R) as Diagnostic Trouble Codes.
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for RS vehicles will cause the Rear Wipe/Wash and A/C status indicators on the A/C-Heater Control Module to flash alternately while the test is
running.
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for RG vehicles will cause the PWR and A/C status indicators on the A/C - Heater Control Module to flash alternately while the test is running.
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The A/C status indicator will flash twice per second to indicate that the A/C Cooldown Test needs to be run. The A/C status indicator will stop
flashing twice per second if either the A/C 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.
The HVAC Door Recalibration function:
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is actuated with the DRBIII(R)
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After completing HVAC Door Recalibration, the DRBIII(R) will the store the total span and the status of each door actuator. Selecting HVAC
Door Cal Monitor in the System Tests will display this information.
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homes and repositions door actuators.
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monitors for door span faults on the actuator circuits.
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faults display on the DRBIII(R) as test messages only after running the test.
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faults will not display on the DRBIII(R) as Diagnostic Trouble Codes.
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for RS vehicles will cause the Rear Wipe/Wash and RECIRC status indicators on the A/C-Heater Control Module to flash alternately while the test
is running.
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for RG vehicles will cause the PWR and RECIRC status indicators on the A/C
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Heater Control Module to flash alternately while the test is running.
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The RECIRC status indicator will flash twice per second to indicate that the HVAC Door Recalibration Test needs to be run. The RECIRC
status indicator will stop flashing twice per second if either the HVAC Door Recalibration 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.
The Actuator Circuit Test:
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is actuated with the DRBIII(R).
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monitors for shorted actuator circuits.
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allows service to easily diagnose and troubleshoot up to three simultaneous shorts.
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supplements the continuous diagnostics on the actuator drive system.
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faults display on the DRBIII(R) as test messages only after running the test.
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faults will not display on the DRBIII(R) as Diagnostic Trouble Codes.
When Performing the Actuator Circuit Test
CAUTION:
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Shorted rear door driver circuits can cause additional Actuator Circuit Test messages to set for circuits where no condition exists to cause a fault.
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To ensure a proper diagnosis, repair all Short Too Complex messages first, all rear door driver circuit related messages second, all common door
driver circuit related messages third, and all front door driver circuit related messages last.
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The DRBIII(R) can display up to three Actuator Circuit Test messages at a time. After repairing each Actuator Circuit Test message, cycle the
ignition switch, then rerun the Actuator Circuit Test to ensure no new messages exist.
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The Short Too Complex message:
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indicates that a specific determination of which lines are shorted could not be made.
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is caused by more than three drivers being shorted in the same direction. For example, four drivers all shorted to ground, or two or more
drivers shorted with at least one driver shorted to ignition/battery and one driver shorted to ground.
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Messages displaying:
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XXX Driver/Circuit Shorted to Ignition/ Battery will set on a per-driver basis.
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XXX Driver/Circuit Shorted to Ground will set on a per-driver basis.
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the same two drivers/circuits shorted to ignition/battery as-well-as shorted to ground indicates that two actuator driver circuits are shorted
together.When the test returns passed, then troubleshooting should proceed to clearing faults and running the HVAC Door Recalibration
system test as a final check of system health.
Instrument Cluster
The Instrument Cluster receives and sends messages to other modules via the PCI bus circuit. The indicator lamps will illuminate briefly for a bulb check
when the ignition is turned from off to run. All of the gauges receive their information via the PCI bus from the powertrain control module and body
control module.
The gauges and the LEDs are not individually replaceable thereby requiring complete replacement of the Instrument Cluster if a repair is necessary. In
the event that the Instrument Cluster loses communication with other modules on the PCI bus, the cluster will display no bus in the VF display.
The Trip/Reset button is used to switch the display from trip to total mileage. Holding the button when the display is in the trip mode will reset the trip
