Chrysler Caravan 2003, Owner'S Manual

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• faults display on the DRBIII
t
as test messages
only after running the test.
• faults will not display on the DRBIII
t
as Diag-
nostic Trouble Codes.
When Performing the Actuator Circuit Test
CAUTION: Shorted rear door driver circuits
can cause additional Actuator Circuit Test
messages to set for circuits where no
condition exists to cause a fault.
CAUTION: 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.
CAUTION: The DRBIII
T
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.
• The Short Too Complex message:
c indicates that a specific determination of
which lines are shorted could not be made.
c
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.
• Messages displaying:
c
XXX Driver/Circuit Shorted to Ignition/
Battery will set on a per-driver basis.
c XXX Driver/Circuit Shorted to Ground will
set on a per-driver basis.
c 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 troubleshoot-
ing should proceed to clearing faults and running
the HVAC Door Recalibration system test as a
final check of system health.
3.10 CABIN HEATER
NOTE: The Cabin Heater, also known as the
Diesel Cabin Heater Assist (DCHA), will be
referred to as the DCHA throughout most of
the General Information and the Diagnostic
Procedures in this manual.
3.10.1 GENERAL SAFETY INFORMATION
WARNING: DO NOT OPERATE THE DCHA IN
AN ENCLOSED AREA SUCH AS A GARAGE
THAT
DOES NOT HAVE EXHAUST
VENTILATION FACILITIES. ALWAYS VENT
THE DCHA’s EXHAUST WHEN OPERATING
THE DCHA. REFER TO 3.10.3.1 VENTING THE
DCHA’S EXHAUST FOR PROPER EXHAUST
VENTING
INSTRUCTIONS. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY
RESULT IN PERSONAL INJURY OR DEATH.
WARNING: ALLOW THE DCHA ASSEMBLY
TO COOL BEFORE PERFORMING A COM-
PONENT
INSPECTION/REPAIR/REPLACE-
MENT. FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY RESULT IN PERSONAL
INJURY.
WARNING: ALWAYS DISCONNECT THE
VEHICLE’S BATTERY PRIOR TO PER-
FORMING ANY TYPE OF WORK ON THE
DCHA.
FAILURE TO FOLLOW THESE
INSTRUCTIONS MAY RESULT IN PERSONAL
INJURY OR DEATH.
WARNING: NEVER ATTEMPT TO REPAIR THE
DCHA HEATER MODULE OR ANY OF ITS
INTERNAL COMPONENTS. ALWAYS PER-
FORM DCHA COMPONENT REPLACEMENT
IN
ACCORDANCE WITH THE SERVICE
INFORMATION. FAILURE TO FOLLOW
THESE INSTRUCTIONS MAY RESULT IN
PERSONAL INJURY OR DEATH.
21
GENERAL INFORMATION