2001 CHRYSLER VOYAGER ignition

Symptom:
DRIVER BLEND DOOR NOT RESPONDING (ACTIVE)
When Monitored and Set Condition:
DRIVER BLEND DOOR NOT RESPONDING (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set if the ATC does not receive feedback pulses within 5
seconds of the drive voltage being applied.
POSSIBLE CAUSES
DRIVER BLEND DOOR DRIVER CIRCUIT (A) SHORTED TO GROUND
DRIVER BLEND DOOR DRIVER CIRCUIT (B) SHORTED TO GROUND
DRIVER BLEND DOOR DRIVER CIRCUITS (A) AND (B) SHORTED TOGETHER
DRIVER BLEND DOOR DRIVER CIRCUIT (A) OPEN
DRIVER BLEND DOOR DRIVER CIRCUIT (B) OPEN
AT C
DRIVER BLEND DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Driver Blend Door Driver (A) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 2
No®Repair the Driver Blend Door Driver (A) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between ground and the Driver Blend Door Driver (B) circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the Driver Blend Door Driver (B) circuit for a short to
ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
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AUTOMATIC TEMPERATURE CONTROL

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Driver Blend Door Driver (A) and (B) circuits.
Is the resistance above 100k ohms?All
Ye s®Go To 4
No®Repair the Driver Blend Door Driver (A) and (B) circuits for a
short together.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Driver Blend Door Driver (A) circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 5
No®Repair the Driver Blend Door Driver (A) circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Disconnect the ATC C1 harness connector.
Measure the resistance of the Driver Blend Door Driver (B) circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Driver Blend Door Driver (B) circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the ATC C1 harness connector.
Measure the resistance between the Driver Blend Door Driver (A) and (B) circuits.
Is the resistance between 26.0 and 46.0 ohms?All
Ye s®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 7
7 If there are no possible causes remaining, view repair. All
Repair
Replace the Driver Blend Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
235
AUTOMATIC TEMPERATURE CONTROL
DRIVER BLEND DOOR NOT RESPONDING (ACTIVE) ÐContinued

Symptom:
DRIVER BLEND DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored and Set Condition:
DRIVER BLEND DOOR TRAVEL TOO LARGE (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is greater than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
DRIVER BLEND DOOR ACTUATOR
DRIVER BLEND DOOR LINKAGE
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the DRIVER BLEND DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Remove the Driver Blend Door Actuator.
By hand, attempt to rotate the driver blend door motor in both directions.
Did the blend door actuator turn in either direction?All
Ye s®Replace the Driver Blend Door Actuator.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
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AUTOMATIC TEMPERATURE CONTROL

Symptom:
DRIVER BLEND DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored and Set Condition:
DRIVER BLEND DOOR TRAVEL TOO SMALL (ACTIVE)
When Monitored: With the ignition on and the IOD fuse installed.
Set Condition: This DTC is set when the ATC monitors the travel range during system
initialization and the measured range is less than expected.
POSSIBLE CAUSES
CHECK THE ATC FOR DTCS
AT C
OBSTRUCTED BLEND DOOR
DRIVER BLEND DOOR ACTUATOR
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, read the active ATC DTCs.
Is the DRIVER BLEND DOOR NOT RESPONDING DTC set?All
Ye s®Return to the symptom list and choose the symptom.
With the DRBIIIt, reset the ATC after repair/replacement is
completed.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
2 Turn the ignition off.
Disconnect the Driver Blend Door Actuator harness connector.
Connect a 12-volt Test Light between the Driver Blend Door Actuator harness
connector cavities.
Turn the ignition on.
While monitoring the test light, turn the driver blend control knob from lo to hi.
Note: Observe test light for approximately 30 seconds.
Does the test light start to flash and stay flashing?All
Ye s®Go To 3
No®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
completed.
Perform BODY VERIFICATION TEST - VER 1.
238
AUTOMATIC TEMPERATURE CONTROL

Symptom:
EEPROM CHECKSUM ERROR (ACTIVE)
When Monitored and Set Condition:
EEPROM CHECKSUM ERROR (ACTIVE)
When Monitored: Ignition in RUN and IOD fuse installed after a battery disconnect.
Set Condition: This DTC is set if the calibrated check sum does not match the stored
value.
POSSIBLE CAUSES
ATC - EEPROM CHECKSUM ERROR
TEST ACTION APPLICABILITY
1 When this code is present, the ATC must be replaced.
View repair.All
Repair
Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
240
AUTOMATIC TEMPERATURE CONTROL

Symptom:
EVAP TEMP SENSOR OPEN
When Monitored and Set Condition:
EVAP TEMP SENSOR OPEN
When Monitored: During the Cooldown Test.
Set Condition: This message is displayed if the ATC detects an abnormally high voltage
on the evaporator temperature sensor signal during the Cooldown Test.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the in-line C202 harness connector.
Connect a jumper wire between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit at the in-line C202 harness connector (HVAC side).
Turn the ignition on.
With the DRBIIItin Sensor Display, read the Evaporator Temperature Sensor
voltage.
Does the DRBIIItdisplay: 0.0 volts?All
Ye s®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 DRBIIIt, reset the ATC after repair/replacement 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 of the Evaporator Temperature Sensor Signal circuit between
the ATC C2 harness connector and the in-line C202 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®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 an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
241
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 of the Sensor Ground circuit between the ATC C1 harness
connector and the in-line C202 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement 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 DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
242
AUTOMATIC TEMPERATURE CONTROL
EVAP TEMP SENSOR OPEN ÐContinued

Symptom:
EVAP TEMP SENSOR SHORTED
When Monitored and Set Condition:
EVAP TEMP SENSOR SHORTED
When Monitored: During the Cooldown Test.
Set Condition: This message is displayed 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
AT C
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the in-line C202 harness connector.
Turn the ignition on.
With the DRBIIItin Sensor Display, read the Evaporator Temperature Sensor
voltage.
Does the DRBIIItdisplay: 5.0 volts or greater?All
Ye s®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 DRBIIIt, reset the ATC after repair/replacement 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
Ye s®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 DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
243
AUTOMATIC TEMPERATURE CONTROL