air condition CHRYSLER VOYAGER 2000 Diagnostic Manual

TEST ACTION APPLICABILITY
7 Ignition Off
Note: Battery must be fully charged.
Note: Generator belt tension and condition must be checked before continu-
ing.
Disconnect the Generator Field Connector.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the Generator Field Driver Circuit
from PCM Connector to Generator Field Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair the open Driver Circuit.
Perform Powertrain Verification Test VER-3A.
8 If there are no potential causes remaining, the Generator is assumed to be defective.
View repair options.All
Repair
Repair or replace the Generator as necessary.
Perform Powertrain Verification Test VER-3A.
23
CHARGING
P-1682 CHARGING SYSTEM VOLTAGE TOO LOW ÐContinued
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Symptom:
* CHECKING CHARGING SYSTEM OPERATION WITH NO DTC'S
POSSIBLE CAUSES
TROUBLE CODES PRESENT
VOLTAGE DIFFERENCE >= 1 VOLT
GENERATOR FIELD TERMINAL INTERMITTENT DEFECTIVE
GENERATOR GROUND CIRCUIT HIGH RESISTANCE
B+ CIRCUIT HIGH RESISTANCE (0.4 VOLT)
B+ CIRCUIT HIGH RESISTANCE (1 VOLT)
PCM DEFECTIVE (CHARGING SYSTEM NO CODE)
GENERATOR BELT VISIBLY DEFECTIVE
TROUBLE CODES PRESENT 1600 RPM
TEST ACTION APPLICABILITY
1Note: Battery condition must be verified prior to this test.
Inspect the Generator Belt tension and condition.
Is the Generator Belt in good condition?All
Ye s®Go To 2
No®Repair as necessary.
Perform Powertrain Verification Test VER-3A.
2 Engine Running
With the DRB, set engine speed to 1600 RPM for 30 seconds.
With the DRB, return the engine to idle speed and read codes.
Are there any Charging System trouble codes?All
Ye s®Refer to Symptom List for problems related to Charging.
Perform Powertrain Verification Test VER-3A.
No®Go To 3
3 Turn ignition on. (Engine off)
With the DRB, actuate the Generator field.
Using a Voltmeter, backprobe Generator Field Driver Terminal at the back of
Generator.
Note: The voltage should cycle from 7.2 volts to Battery voltage every 1.4
seconds, at both Terminals.
While monitoring the Voltmeter, wiggle the field Terminals back to the PCM and ASD
Relay.
Was there any interruption in the normal cycle between 7.2 volts and Battery
voltage?All
Ye s®Repair the Wire where wiggling interrupted the voltage cycle.
Perform Powertrain Verification Test VER-3A.
No®Go To 4
24
CHARGING
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Symptom:
P-0106 BAROMETRIC PRESSURE OUT OF RANGE
When Monitored and Set Condition:
P-0106 BAROMETRIC PRESSURE OUT OF RANGE
When Monitored: With the ignition key on at less than 350 milliseconds and engine speed
at less than 255 RPM.
Set Condition: The PCM senses the voltage from the MAP sensor to be less than 2.196
volts but above 0.019 volt for 300 milliseconds
POSSIBLE CAUSES
MAP SENSOR 5V SUPPLY CIRCUIT OPEN
MAP SENSOR 5V SUPPLY CIRCUIT SHORT TO GROUND
MAP SENSOR SIGNAL CIRCUIT OPEN
MAP SENSOR SIGNAL CIRCUIT PARTIAL SHORT TO GROUND
MAP SENSOR WIRING HARNESS INTERMITTENT DEFECT
MAP SENSOR WIRING HARNESS OBSERVABLE DEFECT
MAP SENSOR DEFECTIVE
PCM DEFECTIVE (VOLTAGE HIGH)
PCM DEFECTIVE (VOLTAGE LOW)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the MAP Sensor voltage.
Is the voltage below 2.2 volts?All
Ye s®Go To 2
No®Go To 11
2 Ignition Off
Disconnect the MAP Sensor Electrical Connector.
Turn the ignition on, engine not running.
Note: Check connectors - Clean/repair as necessary.
Using a Voltmeter, measure voltage of the 5-Volt Supply Circuit at the Map Sensor
Connector.
Is the voltage above 4.5 volts?All
Ye s®Go To 3
No®Go To 7
27
DRIVEABILITY
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Symptom:
P-0107 MAP SENSOR VOLTAGE TOO LOW
When Monitored and Set Condition:
P-0107 MAP SENSOR VOLTAGE TOO LOW
When Monitored: With engine rpm above 400 but less than 1500 and the TP Sensor
voltage less than 1.0 volt.
Set Condition: The MAP Sensor Signal voltage is below 1.2 volts at start, or below .02 volt
for 1.76 seconds with engine running.
POSSIBLE CAUSES
MAP SENSOR CONN/WIRING HARNESS INTERMITTENT DEF
MAP SENSOR CONN/WIRING HARNESS OBSERVABLE DEFECT
MAP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
MANIFOLD ABSOLUTE PRESSURE SENSOR DEFECTIVE
POWERTRAIN CONTROL MODULE DEFECTIVE
MAP SENSOR SIGNAL CIRCUIT OPEN
MAP SENSOR SIGNAL CKT SHORTED TO SENSOR GROUND CKT
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the MAP Sensor voltage.
Is the MAP Sensor voltage below 1.2 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition Off
Disconnect the MAP Sensor Electrical Connector.
Ignition on, engine not running.
Note: Check connectors - Clean/repair as necessary.
Use the DRB to read MAP Sensor voltage.
Is the MAP Sensor voltage above 4.0 volts?All
Ye s®Replace the MAP Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
30
DRIVEABILITY
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Symptom:
P-0108 MAP SENSOR VOLTAGE TOO HIGH
When Monitored and Set Condition:
P-0108 MAP SENSOR VOLTAGE TOO HIGH
When Monitored: With engine rpm above 400 but less than 1500 and closed throttle.
Set Condition: The MAP Sensor Signal voltage is greater than 4.6.
POSSIBLE CAUSES
MAP SENSOR GROUND CIRCUIT OPEN
MAP SENSOR SIGNAL CIRCUIT OPEN
MAP SENSOR DEFECTIVE
MAP SENSOR WIRING HARN AND CONN INTERMITTENT DEF
MAP SENSOR WIRING HARNESS AND CONN OBSERVABLE DEF
PCM DEFECTIVE (MAP SENSOR VOLTAGE TOO HIGH)
TEST ACTION APPLICABILITY
1 Start the engine.
With the DRB, read the MAP Sensor voltage.
Is the MAP Sensor voltage above 4.6 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition Off
Disconnect the MAP Sensor Electrical Connector.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Sensor Signal and Sensor Ground Circuits.
Turn ignition on, use the DRB to read the MAP Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Replace the MAP Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 Ignition Off
Disconnect the MAP Sensor Electrical Connector.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the Sensor Signal Circuit and an engine ground.
Ignition On.
Read the MAP Sensor voltage.
Is the MAP Sensor voltage below 1.0 volt?All
Ye s®Repair the open MAP Sensor Ground Circuit.
Perform Powertrain Verification Test VER-5A.
No®Go To 4
32
DRIVEABILITY
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Symptom:
P-0112 INTAKE AIR TEMP SENSOR VOLTAGE LOW
When Monitored and Set Condition:
P-0112 INTAKE AIR TEMP SENSOR VOLTAGE LOW
When Monitored: With the ignition on and the engine running.
Set Condition: The intake air sensor circuit voltage at PCM cavity 37 goes below .51 volt.
POSSIBLE CAUSES
IAT SEN WIRING HARNESS INTERMITTENT DEFECT
IAT SEN WRING HARNESS OBSERVABLE DEFECT
SENSOR SIGNAL CIRCUIT SHORT TO GROUND
SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GND CIRCUIT
IAT SENSOR VOLTAGE GREATER THAN 4.0 VOLTS
PCM DEFECTIVE (IAT SENSOR)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the IAT Sensor voltage.
Is the IAT Sensor voltage below 0.5 volt?All
Ye s®Go To 2
No®Go To 6
2 Ignition Off
Disconnect the IAT Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Ignition On, Engine Not Running
With the DRB, read the IAT Sensor voltage.
Is the IAT Sensor voltage above 4.0 volts?All
Ye s®Replace the IAT Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 Ignition Off
Disconnect the IAT Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Disconnect the PCM Connector.
Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the Sensor Signal Circuit to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Sensor Signal Circuit for a short to ground.
Perform Powertrain Verification Test VER-5A.
No®Go To 4
34
DRIVEABILITY
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Symptom:
P-0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH
When Monitored and Set Condition:
P-0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH
When Monitored: With the ignition on and the engine running.
Set Condition: The intake air sensor circuit voltage at PCM cavity 37 goes above 4.9 volts.
POSSIBLE CAUSES
IAT SENSOR DEFECTIVE
IAT SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
IAT SENSOR WIRING HARNESS INTERMITTENT DEFECT
IAT SENSOR WIRING HARNESS OBSERVABLE DEFECT
PCM DEF (IAT SENSOR)
TEST ACTION APPLICABILITY
1 Ignition on with engine not running.
Read the IAT Sensor voltage.
Is the IAT Sensor voltage above 4.5 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition Off.
Disconnect the IAT Sensor.
Check Connectors - clean/repair as necessary.
Ignition on with engine not running.
Connect the jumper wire between the IAT Signal and Sensor Ground Circuits.
With the DRB, read the IAT Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Replace the IAT Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 Ignition Off
Disconnect the IAT Sensor Electrical Connector.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the IAT Signal Circuit and an engine ground.
Ignition on, engine not running.
Read the Intake Air Temperature Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Go To 4
No®Repair the open Sensor Ground Circuit.
Perform Powertrain Verification Test VER-5A.
36
DRIVEABILITY
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Symptom:
P-0117 ECT SENSOR VOLTAGE TOO LOW
When Monitored and Set Condition:
P-0117 ECT SENSOR VOLTAGE TOO LOW
When Monitored: With the ignition on.
Set Condition: The engine coolant temperature sensor circuit voltage at PCM cavity 26
goes below .5 volt for more than 3 seconds.
POSSIBLE CAUSES
ECT SENSOR VOLTAGE ABOVE 4.0 VOLTS
ECT SENSOR SIGNAL CIRCUIT SHORT TO GROUND
ECT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND CKT
ECT WIRING HARNESS INTERMITTENT DEFECT
ECT WIRING HARNESS OBSERVABLE DEFECT
PCM DEFECTIVE (ECT SENSOR V LOW)
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the Engine Coolant Temperature (ECT) Sensor voltage.
Is the Engine Coolant Temperature Sensor voltage below 0.5 volt?All
Ye s®Go To 2
No®Go To 6
2 Ignition Off
Disconnect the Engine Coolant Temperature (ECT) Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
With the DRB, read the Engine Coolant Temperature Sensor voltage.
Is the ECT Sensor voltage above 4.0 volts?All
Ye s®Replace the Engine Coolant Temperature Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
38
DRIVEABILITY
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Symptom:
P-0118 ECT SENSOR VOLTAGE TOO HIGH
When Monitored and Set Condition:
P-0118 ECT SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition on.
Set Condition: The engine coolant temperature sensor circuit voltage at PCM cavity 26
goes above 4.9 volts for more than 3 seconds.
POSSIBLE CAUSES
ECT SENSOR DEFECTIVE
ECT SENSOR GROUND CIRCUIT OPEN
ECT SENSOR SIGNAL CIRCUIT OPEN
ECT SENSOR WIRING HARNESS INTERMITTENT DEFECT
ECT SENSOR WIRING HARNESS OBSERVABLE DEFECT
PCM DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the ECT Sensor voltage.
Is the ECT Sensor voltage above 4.9 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition On, Engine Not Running
Disconnect the ECT Sensor.
Note: Check connectors - Clean/repair as necessary.
Connect a jumper wire between the ECT Sensor Signal Circuit and the Sensor
Ground Circuit.
With the DRB, read the ECT Sensor voltage.
Is the voltage below 1.0 volt?All
Ye s®Replace the ECT Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
40
DRIVEABILITY
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TEST ACTION APPLICABILITY
4 Turn the ignition on.
With the DRB, read the FREEZE FRAME DATA.
Using the FREEZE FRAME DATA, attempt to duplicate the condition that has set
this fault.
While using the FREEZE FRAME DATA, pay particular attention to the fault setting
conditions, such as vehicle speed, engine temperature, vehicle load, and MAP
vacuum.
Does P0121 reset?All
Ye s®Go To 6
No®Go To 5
5 Ignition Off
Start engine.
With the DRB, read the MAP Sensor voltage.
Did the MAP Sensor voltage drop from above 3.5 volts to below 2.0 volts?All
Ye s®Go To 6
No®Refer to symptom * CHECKING MAP SENSOR CALIBRATION
in the DRIVEABILITY category.
6 Ignition On, Engine Not Running
Using the schematic as a guide, wiggle the TPS Harness and Connectors to PCM.
While monitoring the DRB, observe for the TPS voltage to change.
Did the TPS voltage change at any time?All
Ye s®Repair the Harness or Connectors as necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 7
7 Ignition On, Engine Not Running
With the DRB, read the Throttle Position Sensor voltage.
Is the Throttle Position Sensor voltage above 1.0 volt?All
Ye s®Replace the Throttle Position Sensor.
Perform Powertrain Verification Test VER-5A.
No®Go To 8
8 Ignition On, Engine Not Running
While monitoring the DRB, open the Throttle Plate to wide open throttle.
Is the Throttle Position Sensor voltage above 3.5 volts?All
Ye s®Go To 9
No®Replace the Throttle Position Sensor.
Perform Powertrain Verification Test VER-5A.
9 Ignition On, Engine Not Running
While monitoring the DRB slowly open and close the Throttle Plate.
Note: You must move linkage very slowly while looking for a jump in
voltage.
Is the voltage change smooth?All
Ye s®Go To 10
No®Replace the Throttle Position Sensor.
Perform Powertrain Verification Test VER-5A.
43
DRIVEABILITY
P-0121 TPS VOLTAGE DOES NOT AGREE WITH MAP ÐContinued
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