display CHRYSLER VOYAGER 2001 Service Manual

Symptom:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE)
- MANUAL A/C
When Monitored and Set Condition:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE) - MANUAL
A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the Evaporator Temperature Sensor/sensor circuit is
open.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Open the glove box door. Disconnect the glove box door roller latch from each side of
the glove box. Roll the glove box downward toward the floor.
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 in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
538
HEATING & A/C

Symptom:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORT (AC-
TIVE) - MANUAL A/C
When Monitored and Set Condition:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORT (ACTIVE) - MANUAL
A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the Evaporator Temperature Sensor/sensor circuit is
shorted low.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIR-
CUIT
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Open the glove box door. Disconnect the glove box door roller latch from each side of
the glove box. Roll the glove box downward toward the floor.
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 in accordance with the Service
Info.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
540
HEATING & A/C

Symptom List:
LOOPBACK FAILURE (ACTIVE) - MANUAL A/C
LOOPBACK TEST FAILURE (ACTIVE) - MANUAL A/C
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LOOPBACK FAILURE (ACTIVE)
- MANUAL A/C.
When Monitored and Set Condition:
LOOPBACK FAILURE (ACTIVE) - MANUAL A/C
When Monitored: When the A/C - Heater Control Module executes an internal loopback
test.
Set Condition: If the A/C - Heater Control Module fails to send a message, or none of the
expected messages arrive for 5 seconds, an internal loopback test is executed. If the
internal loopback test fails, the DTC will set.
LOOPBACK TEST FAILURE (ACTIVE) - MANUAL A/C
When Monitored: When the A/C - Heater Control Module executes an internal loopback
test.
Set Condition: If the A/C - Heater Control Module fails to send a message, or none of the
expected messages arrive for 5 seconds, an internal loopback test is executed. If the
internal loopback test fails, the DTC will set.
POSSIBLE CAUSES
ADDITIONAL CODE(S) PRESENT
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any additional HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
546
HEATING & A/C

Symptom List:
NO PCM MESSAGE RECEIVED (ACTIVE) - MANUAL A/C
PCM COMMUNICATION FAILURE (ACTIVE) - MANUAL A/C
VEHICLE ODOMETER FAILURE (ACTIVE) - MANUAL A/C
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be NO PCM MESSAGE RECEIVED
(ACTIVE) - MANUAL A/C.
When Monitored and Set Condition:
NO PCM MESSAGE RECEIVED (ACTIVE) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module does not see any
messages from the PCM for more than 5 seconds.
PCM COMMUNICATION FAILURE (ACTIVE) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module does not receive the
Fuel message from the PCM for more than 5 seconds.
VEHICLE ODOMETER FAILURE (ACTIVE) - MANUAL A/C
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module does not receive the
Vehicle Odometer message from the PCM for more than 5 seconds.
POSSIBLE CAUSES
MESSAGE NOT RECEIVED
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM
PCI BUS CIRCUIT OPEN
POWERTRAIN/ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, enter HVAC, System Tests then PCM Monitor.
Does the DRBIIItdisplay: PCM is active on BUS?All
Ye s®Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 2
547
HEATING & A/C

TEST ACTION APPLICABILITY
1 Turn the ignition on.
NOTE: All Overcurrent DTCs must be repaired before diagnosing Calibra-
tion messages.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No: Rear Blend Calibration message set.
Go To 2
No: Rear Mode Calibration message set.
Go To 4
2 Turn the ignition off.
Turn the A/C - Heater Control, rear blower control switch knob to the Rear position.
Set the Rear Blower Rear Control, blend control switch knob to the full cold position.
Disconnect the Rear A/C - Heater Unit harness connector.
Connect a 12-volt Test Light between the Rear Blend Door Driver circuit and the
Rear Common Door Driver circuit (Cavity 8) at the Rear A/C - Heater Unit harness
connector (HVAC side).
Turn the ignition on.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full cold to full hot.
While monitoring the test light, manually sweep the Rear Blower Rear Control, rear
blend control switch knob very slowly from full hot to full cold.
Does the test light start to flash and stay flashing through the entire range?All
Ye s®Go To 3
No®Go To 7
3 Turn the ignition off.
Disconnect the Rear A/C - Heater Unit harness connector.
Remove the Rear Blend Door Actuator from the Rear A/C - Heater Housing.
Disconnect the Rear Blend Door Actuator harness connector.
Measure the resistance of the Rear Blend Door Driver circuit between the Rear Blend
Door Actuator harness connector and the Rear A/C - Heater Unit harness connector
(plenum side).
Measure the resistance of the Rear Common Door Driver circuit between the Rear
Blend Door Actuator harness connector and the Rear A/C - Heater Unit harness
connector (Cavity 8) (plenum side).
Is the resistance below 5.0 ohms for both circuits?All
Ye s®Go To 6
No®Repair the circuit with the resistance above 5 ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
550
HEATING & A/C
REAR BLEND CALIBRATION FAULT - MANUAL A/C ÐContinued

Symptom:
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MANUAL A/C
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the Rear Blower Rear Control Switch, Rear Blend
Potentiometer/5 Volt Supply/Rear Temperature Feedback Signal circuit is shorted low or
high.
POSSIBLE CAUSES
REAR BLEND POTENTIOMETER SHORTED
5 VOLT SUPPLY CIRCUIT SHORTED TO REAR TEMPERATURE RETURN CIRCUIT
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT SHORTED TO GROUND
A/C - HEATER CONTROL MODULE
5 VOLT SUPPLY CIRCUIT SHORTED TO REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT
5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
REAR TEMPERATURE FEEDBACK SIGNAL CIRCUIT SHORTED TO VOLTAGE
REAR TEMPERATURE FEEDBACK SIGNAL CKT SHORTED TO REAR TEMPERATURE RETURN
CKT
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
With the DRBIIItin Input/Output Display, read the Rear Blend position status.
What is the Rear Blend position status?All
Open
Replace the Rear Blower Rear Control Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Full Cold
Go To 2
Full Hot
Go To 5
556
HEATING & A/C

Symptom:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored and Set Condition:
TX FAILURE (ACTIVE) - MANUAL A/C
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the A/C - Heater Control Module is unable to send a
message.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
ADDITIONAL CODE(S) PRESENT
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM, BCM, AND FCM
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the HVAC Module.
Was the DRBIIItable to I/D or communicate with the HVAC Module?All
Ye s®Go To 2
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIItdisplay any additional HVAC DTCs?All
Ye s®Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the PCM/ECM.
With the DRBIIIt, attempt to communicate with the BCM.
With the DRBIIIt, attempt to communicate with the FCM.
Was the DRBIIItable to I/D or communicate with the PCM/ECM, BCM and FCM?All
Ye s®Go To 4
No®Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
559
HEATING & A/C

Symptom:
FRONT FOG LAMP INDICATOR OPEN
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
FRONT FOG LAMP INDICATOR CIRCUIT OPEN
FRONT FOG LAMP INDICATOR GROUND CIRCUIT OPEN
FRONT FOG LAMP INDICATOR CIRCUIT SHORT TO VOLTAGE
HEADLAMP SWITCH
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase Body Control Module DTC's.
Turn the ignition off, wait 15 seconds, then turn the ignition on.
Turn on the Front Fog Lamps.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay FRONT FOG LAMP INDICATOR OPEN?All
Ye s®Go To 2
No®Go To 8
2 Turn the ignition off to the lock position.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Turn ON the Front Fog Lamps.
Using a 12-volt test light connected to ground, back probe the Front Fog Lamp
Indicator circuit in the Headlamp Switch harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Go To 3
No®Go To 6
3 Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Front Fog Lamp Indicator Ground circuit from the
Body Control Module harness connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair the Front Fog Lamp Indicator Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 4
567
INSTRUMENT CLUSTER

Symptom:
FRONT FOG LAMP INDICATOR SHORT TO GROUND
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
FRONT FOG LAMP INDICATOR CIRCUIT SHORT TO GROUND
HEADLAMP SWITCH
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase Body Control Module DTC's.
Turn the ignition off, wait 15 seconds, then turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay FRONT FOG LAMP INDICATOR SHORT TO GROUND?All
Ye s®Go To 2
No®Go To 6
2 Turn the ignition off to the lock position.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
Turn ON the Front Fog Lamps.
Using a 12-volt test light connected to ground, back probe the Rear Fog Lamp
Indicator circuit in the Headlamp Switch harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s®Go To 3
No®Go To 4
3 If there are no possible causes remaining, view repair. All
Repair
Replace the Headlamp Switch.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Front Fog Lamp Indicator circuit.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Front Fog Lamp Indicator circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 If there are no possible causes remaining, view repair. All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
569
INSTRUMENT CLUSTER

TEST ACTION APPLICABILITY
3 Turn the ignition on.
Disconnect the Fuel Tank Module harness connector.
Measure the resistance of the Ground circuits in the Fuel Tank Module harness
connector.
Is the resistance below 5.0 ohms for both measurements?All
Ye s®Go To 4
No®Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the Fuel Tank Module harness connector.
Turn the ignition on.
With the DRBIIItin Body Computer then Sensors, monitor the Fuel Sensor.
Using a jumper wire, jumper the Fuel Level Sensor Signal circuit to the ground
circuit in the Fuel Tank Module harness connector.
Does the DRB display below 0.5 volt?All
Ye s®Replace the Fuel Level Sending Unit.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 5
5 Turn the ignition off.
Disconnect the Fuel Tank Module harness connector.
Disconnect the BCM C3 harness connector.
Measure the resistance of the Fuel Level Sensor Signal circuit between the Fuel Tank
Module harness connector and the BCM harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Fuel Level Sensor Signal for an open.
Perform BODY VERIFICATION TEST - VER 1.
6 If there are no possible causes remaining, view repair. All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
7WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?All
Ye s®Repair as necessary
Perform BODY VERIFICATION TEST - VER 1.
No®Test Complete.
573
INSTRUMENT CLUSTER
FUEL LEVEL SENDING UNIT INPUT OPEN ÐContinued