Chrysler Town and Country 2003 Owner's Manual page 561

COOLDOWN TEST TOO COLD TO START - MTC —
TEST
3 CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°F) to test A/C
system operation.
Turn the ignition on.
With the DRBIII , check the PCM/ECM for DTCs.
Are any DTCs present?
Yes → Refer to Powertrain Diagnostic information for the related symp-
→ Go To 4
No
4 Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
voltage.
Is the voltage above 4.9 volts?
Yes → Go To 5
→ Go To 6
No
5 Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Connect a jumper wire between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit at the Evaporator Temperature Sensor harness
connector.
Turn the ignition on.
With the DRBIII
voltage.
Is the voltage 0.0 volts?
Yes → Replace the Evaporator Temperature Sensor in accordance with
→ Go To 6
No
6 NOTE: Ensure that the Evaporator Temperature Sensor harness connector
is connected to the Evaporator Temperature Sensor.
NOTE: Ensure that the voltmeter leads meet the terminals in the connector
and that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity.
Back probe the Sensor Ground circuit between the Evaporator Temperature Sensor
harness connector and the A/C - Heater Control Module C1 harness connector.
Turn the ignition on.
Is the voltage below 0.10 volt?
Yes → Go To 7
→ Repair the high resistance in the Sensor Ground circuit. After
No
ACTION
tom(s). After the repair is complete, with the DRBIII , erase the
DTC(s). Cycle the ignition switch. With the DRBIII , actuate the
Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
in Sensor Display, read the Evaporator Temperature Sensor
in Sensor Display, read the Evaporator Temperature Sensor
the Service Information. After repair is complete, rerun the
Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
537
HEATING & A/C
Continued
APPLICABILITY
All
All
All
All