Chrysler Town, Dodge Caravan. Manual — part 745
TEST
ACTION
APPLICABILITY
6
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance of the Sensor Ground circuit between the ATC C2 harness
connector and the in-line C202 harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Check the wiring harness between the in-line C202 harness
connector (plenum side) and the Evap Temp Sensor for an open.
Repair as necessary. If Ok, replace the Evaporator Temperature
Sensor.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Sensor Ground circuit between the ATC C2 harness
connector and the in-line C202 harness connector (HVAC side) for
an open.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
216
AUTOMATIC TEMPERATURE CONTROL
EVAP TEMP SENSOR OPEN (ACTIVE) —
Continued
Symptom:
EVAP TEMP SENSOR SHORTED (ACTIVE)
When Monitored and Set Condition:
EVAP TEMP SENSOR SHORTED (ACTIVE)
When Monitored:
With the ignition on and the IOD fuse installed. Also, during the
Cooldown Test.
Set Condition:
This DTC is displayed if the ATC detects an abnormally low voltage on the
evaporator temperature sensor signal. Evap Temp Sensor Shorted is also displayed as a
Cooldown Test Message if the ATC detects an abnormally low voltage on the evaporator
temperature sensor signal during the Cooldown Test.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIR-
CUIT
ATC
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the in-line C202 harness connector.
Turn the ignition on.
With the DRBIII
t in Automatic Temperature Control, monitor Active DTCs.
Does the DRBIII
t display: Evap Sensor Open?
All
Yes
→ Check the Evap Temp Sensor Signal circuit between the in-line
C202 harness connector (plenum side) and the Evap Temp Sensor
for a short to ground. Repair as necessary. If Ok, replace the
Evaporator Temperature Sensor.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance between ground and the Evaporator Temperature Sensor
Signal circuit (HVAC side).
Is the resistance above 100k ohms?
All
Yes
→ Go To 3
No
→ Repair the Evaporator Temperature Sensor Signal circuit be-
tween the ATC C2 harness connector and the in-line C202
harness connector (HVAC side) for a short to ground.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
217
AUTOMATIC TEMPERATURE CONTROL
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the in-line C202 harness connector.
Measure the resistance between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit (HVAC side).
Is the resistance above 100k ohms?
All
Yes
→ Replace the ATC.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Evaporator Temperature Sensor Signal circuit be-
tween the ATC C2 harness connector and the in-line C202
harness connector (HVAC side) for a short to Sensor Ground.
With the DRBIII
t, reset the ATC after repair is complete.
Perform BODY VERIFICATION TEST - VER 1.
218
AUTOMATIC TEMPERATURE CONTROL
EVAP TEMP SENSOR SHORTED (ACTIVE) —
Continued
Symptom List:
FRONT AND REAR BLOWER OUTPUT 1 OPEN
FRONT AND REAR BLOWER OUTPUT 2 OPEN
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be FRONT AND REAR BLOWER
OUTPUT 1 OPEN.
When Monitored and Set Condition:
FRONT AND REAR BLOWER OUTPUT 1 OPEN
When Monitored:
Continuously.
Set Condition:
If the FCM detects no voltage present on the Front/Rear Blower Motor
Relay Control circuit.
FRONT AND REAR BLOWER OUTPUT 2 OPEN
When Monitored:
Continuously.
Set Condition:
If the FCM detects no voltage present on the Front/Rear Blower Motor
Relay Control circuit.
POSSIBLE CAUSES
FRONT & REAR BLOWER OUTPUT 1/2 OPEN
TEST
ACTION
APPLICABILITY
1
View repair.
All
Repair
Refer to symptom Front and Rear Blower Output 1 Open or
symptom Front and Rear Blower Output 2 Open in the Heating &
A/C category.
Perform BODY VERIFICATION TEST - VER 1.
219
AUTOMATIC TEMPERATURE CONTROL
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