Chrysler Caravan 2003, Owner'S Manual

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• one, two-wire electronic recirculation door actua-
tor.
•
one rear, two-wire electronic blend door actuator.
• one rear, two-wire electronic mode door actuator.
System Relays
•
The Integrated Power Module (IPM) houses and
provides power to the A/C Clutch Relay, Front
Blower Motor Relay, and Rear Blower Motor
Relay.
3.9.2.3 SYSTEM REVISIONS
Revisions to the 2003 MTC system include:
•
all new version 0802 software.
CAUTION: Manual Temperature Control
(MTC) Modules with software versions 0614
and 0700 used in 2001 and 2002 RS/RG
vehicles are NOT compatible with software
version 0802 used in 2003 RS/RG vehicles.
Do NOT install an MTC Module with software
version 0614 or 0700 in a 2003 RS/RG vehicle.
Use the DRBIII
T
to verify which version
software the MTC Module is using by
selecting Body Systems, HVAC, and then
selecting Module Display.
•
an all-new System Test called the Actuator Cir-
cuit Test. Refer to The Actuator Circuit Test
under 3.9.2.4 System Diagnostics for more infor-
mation.
• an updated HVAC Door Recalibration function
that provides actuator span and status data to
ease diagnosis of door span faults.
• updated diagnostic procedures using the actuator
span status data to diagnose HVAC Door Recali-
bration Fault messages.
3.9.2.4 SYSTEM DIAGNOSTICS
Fault detection is through active and stored Diag-
nostic Trouble Codes (DTCs)
•
DTCs are displayed by the DRBIII
t
.
• Active DTCs are those which currently exist in
the system. The condition causing the fault must
be repaired in order to clear this type of DTC.
• Stored DTCs are those which occurred in the
system since the A/C-Heater Control Module re-
ceived the last
9
clear diagnostic info
9
message.
The A/C Cooldown Test:
•
is actuated with the DRBIII
t
.
• checks A/C system performance based on evapo-
rator temperature sensor input.
• will not run if ambient temperature is below
12.7°C (55°F).
•
will pass if the evaporator temperature drops
6.7°C (20°F) within two minutes of starting the
test.
• 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.
• will cause the PWR and A/C status indicators on
the A/C - Heater Control Module to flash alter-
nately while the test is running.
• 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:
• is actuated with the DRBIII
t
.
c After completing HVAC Door Recalibration,
the DRBIII
t
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.
• homes and repositions door actuators.
•
monitors for door span faults on the actuator
circuits.
• 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.
•
will cause the PWR and RECIRC status indica-
tors on the A/C - Heater Control Module to flash
alternately while the test is running.
• The RECIRC status indicator will flash twice per
second to indicate that the HVAC Door Recalibra-
tion 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:
• is actuated with the DRBIII
t
.
•
monitors for shorted actuator circuits.
• allows service to easily diagnose and troubleshoot
up to three simultaneous shorts.
•
supplements the continuous diagnostics on the
actuator drive system.
20
GENERAL INFORMATION