2000 CHRYSLER VOYAGER sensor

TEST ACTION APPLICABILITY
10 Ignition Off
Inspect the Air Filter and Inlet Ducts for restriction(s).
Were there any restrictions?All
Ye s®Repair or replace the Air Inlet System as necessary.
Perform Powertrain Verification Test VER-2A.
No®Refer to symptom * CHECKING THE ENGINE MECHANICAL
SYSTEMS in the DRIVEABILITY category.
236
DRIVEABILITY
* CHECKING FOR OXYGEN SENSOR SWITCHING ÐContinued
ProCarManuals.com

Symptom:
* CHECKING INTAKE AIR TEMPERATURE SENSOR
POSSIBLE CAUSES
INTAKE AIR TEMPERATURE SENSOR DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
Do not allow more than 5 minutes delay between next 2 steps.
With the DRB, read the Intake Air Temperature Sensor and record the reading.
Turn Ignition off.
Remove the IAT Sensor, then proceed to next step.
Using a Temperature Probe, quickly measure intake temperature inside IAT Sensor
opening.
Is the IAT Sensor within ±12 degrees C (10 degrees F) of the probe reading?ENGINE - 2.0L
and 2.4L I-4 DOHC
Ye s®Test Complete.
No®Replace the Intake Air Temperature Sensor.
Perform Verification Test VER-2A.
244
DRIVEABILITY
ProCarManuals.com

Symptom:
* CHECKING MAP SENSOR CALIBRATION
POSSIBLE CAUSES
MAP SENSOR DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition Off
Tee-in a Vacuum Gauge to a Manifold Vacuum source.
Start the engine.
Allow engine to idle.
Note: If engine will not idle, maintain a constant RPM above idle.
Using the DRB, read MAP Sensor Vacuum.
Is the reading within 1 inch of the teed-in Vacuum Gauge?All
Ye s®Go To 2
No®Replace the MAP Sensor.
Perform Verification Test VER-2A.
2 Ignition Off
Disconnect the MAP Sensor Harness Connector.
Ignition On.
Using a voltmeter, measure the 5±volt supply circuit.
Is the voltage above 4.0 volts?All
Ye s®Test Complete.
No®Repair the open 5±volt supply circuit.
Perform Verification Test VER-2A.
245
DRIVEABILITY
ProCarManuals.com

Symptom:
* CHECKING OXYGEN SENSOR HEATER
POSSIBLE CAUSES
1/2 O2 SENSOR VOLTAGE BTWN 0.4 V & 0.6 V
1/1 O2 SENSOR DEFECTIVE
1/2 O2 SENSOR DEFECTIVE
ASD RELAY OUTPUT CIRCUIT OPEN (1/1 O2 SEN)
ASD RELAY OUTPUT CIRCUIT OPEN (1/2 O2 SEN)
HEATER GROUND CIRCUIT OPEN (1/1 O2 SEN)
HEATER GROUND CIRCUIT OPEN (1/2 O2 SEN)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, actuate the ASD O2 Sensor Heater test.
Wait two minutes for O2 Sensor voltage to stabilize.
Read the Upstream O2 Sensor voltage.
Is the voltage of the Upstream O2 Sensor between 0.4 and 0.6 volts?All
Ye s®Go To 2
No®Go To 5
2Note: The O2 Sensor voltage staying between 0.4 V and 0.6 V indicates a
problem with that Sensor Circuit.
Ignition Off
Disconnect the Upstream O2 Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Turn key on.
With the DRB, actuate the O2 Sensor Heater test.
Using a Voltmeter, measure the ASD Relay Output Circuit at Sensor Connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 3
No®Repair the open ASD Relay Output Circuit from O2 sensor
connector back to splice.
Perform Powertrain Verification Test VER-2A.
3 Ignition Off
Disconnect the Upstream O2 Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance between the Heater Ground Circuit and
a good ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the open Heater Ground Circuit to the Upstream O2
Sensor.
Perform Powertrain Verification Test VER-2A.
247
DRIVEABILITY
ProCarManuals.com

TEST ACTION APPLICABILITY
4 If there are no potential causes remaining, the Upstream O2 Sensor is assumed to be
defective.
View repair options.All
Repair
Replace the Upstream O2 Sensor.
Perform Powertrain Verification Test VER-2A.
5 Ignition Off
Turn key on.
With the DRB, actuate the O2 Sensor Heater test.
Wait two minutes for O2 Sensor voltage to stabilize.
With the DRB, read the Downstream O2 Sensor voltage.
Is the voltage of the Downstream O2 Sensor between 0.4 and 0.6 volts?All
Ye s®Go To 6
No®Test complete.
6Note: The O2 Sensor voltage staying between 0.4 and 0.6 V indicates a
problem with that Sensor Circuit.
Ignition Off
Disconnect the Downstream O2 Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Turn key on.
With the DRB, actuate the O2 Sensor Heater test.
Using a Voltmeter, measure the ASD Relay Output Circuit in Sensor Connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 7
No®Repair the open ASD Relay Output Circuit from O2 Sensor
Connector back to splice.
Perform Powertrain Verification Test VER-2A.
7 Ignition Off
Disconnect the Downstream O2 Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance between the Heater Ground Circuit and
a good ground.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair the open Heater Ground Circuit to the Downstream O2
Sensor.
Perform Powertrain Verification Test VER-2A.
8 If there are no potential causes remaining, the Downstream O2 Sensor is assumed to
be defective.
View repair options.All
Repair
Replace the Downstream O2 Sensor.
Perform Powertrain Verification Test VER-2A.
248
DRIVEABILITY
* CHECKING OXYGEN SENSOR HEATER ÐContinued
ProCarManuals.com

Symptom:
* CHECKING PARK/NEUTRAL POSITION SWITCH
POSSIBLE CAUSES
DISPLAY SHOWS9P/N9AND9D/R9
TRANSMISSION RANGE SENSOR DEFECTIVE
PARK/NEUTRAL POSITION SWITCH SENSE CIRCUIT OPEN
PARK/NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND
PCM DEF (P/N POSN SW)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read Park/Neutral Position Switch state.
While moving the gear selector through all gear positions, watch DRB display.
Does the display show9P/N9and9D/R9?All
Ye s®Park/Neutral Position Switch normal, test pass.
No®Go To 2
2 Ignition Off
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Park/Neutral Position Switch Sense Circuit at
the Powertrain Control Module Connector and ground.
While moving gear selector through all gear positions, watch the ohmmeter.
Did the display stay below 5.0 ohms at all times?All
Ye s®Go To 3
No®Go To 5
3 Ignition Off
Disconnect the negative Battery cable.
Disconnect the Powertrain Control Module.
Disconnect the Transmission Control Module.
Measure the resistance between the Park/Neutral Position Switch Sense Circuit at
the PCM harness connector and ground.
Ignition On.
Move the gear selector through all gear positions.
Did the ohmmeter display above 5.0 ohms to below 5.0 ohms?All
Ye s®Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A.
No®Go To 4
249
DRIVEABILITY
ProCarManuals.com

TEST ACTION APPLICABILITY
4 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the Transmission Range Sensor.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Park/Neutral Position Switch Sense Circuit at
the Powertrain Control Module Connector and ground.
While moving gear selector through all gear positions, watch the ohmmeter.
Did the display still remain below 5.0 ohms?All
Ye s®Repair P/N Switch Sense Ckt for a short to ground.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
5 Ignition Off
Disconnect the Powertrain Control Module.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Park/Neutral Position Switch Sense Circuit at
the Powertrain Control Module Connector and ground.
While moving gear selector through all gear positions, watch the ohmmeter.
Did the display switch from below 5.0 ohms to above 5.0 ohms?All
Ye s®Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A.
No®Go To 6
6 Ignition Off
Disconnect the Powertrain Control Module.
Disconnect the Transmission Range Sensor (TRS) Connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Park/Neutral Position Switch Sense Circuit from the
PCM Connector to the TRS Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair open P/N Position Switch Sense Ckt.
Perform Powertrain Verification Test VER-2A.
7 If there are no potential causes remaining, the Transmission Range Sensor or the
P/N Switch is assumed to be defective.
View repair options.All
Repair
Replace the Transmission Range Sensor or P/N Switch.
Perform Powertrain Verification Test VER-2A.
250
DRIVEABILITY
* CHECKING PARK/NEUTRAL POSITION SWITCH ÐContinued
ProCarManuals.com

Symptom:
* CHECKING THE ENGINE MECHANICAL SYSTEMS
POSSIBLE CAUSES
CHECKING ENGINE MECHANICAL SYSTEMS
TEST ACTION APPLICABILITY
1 At this point in the diagnostic test procedure, you have determined that all of the
engine electrical systems are operating as designed; therefore, they are not the cause
of the driveability problem.
The following additional items should be checked as possible mechanical causes of
the problem:
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
CAMSHAFT LOBES - check for abnormal wear
CRANK SENSOR PICK-UP - check crankshaft slots for debris/deterioration
ENGINE EXHAUST SYSTEM - must be free of any restrictions
ENGINE PCV SYSTEM - must flow freely
ENGINE DRIVE SPROCKETS - must be properly positioned
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to
correct injector
Note: If you came to this test from the oxygen sensor, and the rich or lean
condition is not caused by one of the first items above, replace the power-
train control module and perform TEST VER-2A (Road Test Verification).
Always look for any Technical Service Bulletins that may relate to the problem.
Did you come from an Oxygen Sensor rich or lean condition test?All
Ye s®Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
253
DRIVEABILITY
ProCarManuals.com