Chrysler Town and Country 2003 Owner's Manual page 257

INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE
TOO LOW —
Continued
TEST
3 CAUTION: The work area ambient temperature must be above 15.6°C (60°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 the Powertrain Diagnostic information for the related
→ 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 ATC 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 the
No
AUTOMATIC TEMPERATURE CONTROL
ACTION
symptom(s). After the repair is complete, with the DRBIII , erase
the DTC(s). Cycle the ignition switch. With the DRBIII , reset the
ATC. With the DRBIII , accuate 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 the repair is complete, with the
DRBIII , reset the ATC. With the DRBIII , accuate the Cooldown
Test.
Perform BODY VERIFICATION TEST - VER 1.
repair is complete, with the DRBIII , reset the ATC. With the
DRBIII , accuate the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
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APPLICABILITY
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All
All
All