CHRYSLER VOYAGER 2000 Diagnostic Manual

7.0
DIAGNOSTIC INFORMATION AND
PROCEDURES
15
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Symptom:
P-0622 GENERATOR FIELD NOT SWITCHING PROPERLY
When Monitored and Set Condition:
P-0622 GENERATOR FIELD NOT SWITCHING PROPERLY
When Monitored: With the ignition key on and the engine not running.
Set Condition: This trouble code sets when the PCM tries to regulate the generator field
with no result during monitoring.
POSSIBLE CAUSES
GENERATOR FIELD RESISTANCE > = 5.0 OHMS
ASD WIRING HARNESS INTERMITTENT DEFECT
ASD WIRING HARNESS OBSERVABLE DEFECT
GENERATOR FIELD DRIVE CIRCUIT SHORT TO GROUND
GENERATOR FIELD DRIVER CIRCUIT OPEN
PCM DEFECTIVE (GENERATOR)
ASD RELAY OUTPUT CIRCUIT OPEN
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running.
With the DRB, actuate the Generator Field Driver Circuit.
Backprobe the ASD Relay Output Circuit at the back of the Generator.
Is the voltage above 10.0 volts?All
Ye s®Go To 2
No®Repair the open ASD Relay Output Circuit, Generator to Harness
Splice.
2 Engine Running
With the DRB, actuate the Generator Field Driver Circuit.
Backprobe the Generator Field Driver Circuit at the back of the Generator.
Does the voltage shift from low to high?All
Ye s®Go To 3
No®Go To 5
3 Ignition On, Engine Not Running.
With the DRB, actuate the Generator Field Driver Circuit.
With the DRB, read codes.
Wiggle Wiring Harness from the Generator to PCM.
Does the Generator Field Driver Circuit code return?All
Ye s®Repair as necessary where wiggling caused problem to appear.
Perform Powertrain Verification Test VER-3A.
No®Go To 4
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TEST ACTION APPLICABILITY
4 Ignition Off.
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-3A.
No®Test Complete.
5 Ignition Off
Disconnect the PCM.
Disconnect the Generator Field Harness Connector at back of the Generator.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, test resistance across the Generator Field Terminals.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Generator as necessary.
Perform Powertrain Verification Test VER-3A.
6 Ignition Off
Disconnect the PCM.
Disconnect the Generator Field Harness Connector at back of the Generator.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of Generator Field Driver Circuit from
the at Generator Harness Connector to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Generator Field Driver Circuit short to ground.
Perform Powertrain Verification Test VER-3A.
No®Go To 7
7 Ignition Off
Disconnect the PCM.
Disconnect the Generator Field Harness Connector at back of the Generator.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, test the resistance of the Generator Field Driver Circuit
Generator Connector to PCM Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 8
No®Repair open Generator Field Driver Circuit Generator to PCM.
Perform Powertrain Verification Test VER-3A.
8 Ignition Off
If there are no potential causes remaining, the PCM is assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-3A.
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CHARGING
P-0622 GENERATOR FIELD NOT SWITCHING PROPERLY ÐContinued
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Symptom List:
P-1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH
P-1493 BATTERY TEMP SENSOR VOLTAGE TOO LOW
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P-1492 BATTERY TEMP SENSOR
VOLTAGE TOO HIGH.
When Monitored and Set Condition:
P-1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition key on.
Set Condition: The PCM senses the voltage from the BTS to be either below 0.1 volts or
above 4.9 volts for 3 seconds.
P-1493 BATTERY TEMP SENSOR VOLTAGE TOO LOW
When Monitored: With the ignition key on.
Set Condition: The PCM senses the voltage from the BTS to be either below 0.1 volts or
above 4.9 volts for 3 seconds.
POSSIBLE CAUSES
PCM DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition On, Engine Not Running
With the DRB, read the Trouble Codes.
Does the DRB show9Battery Temperature Sensor Voltage9with a run count of zero?All
Ye s®Replace the PCM.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
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Symptom:
P-1594 CHARGING SYSTEM VOLTAGE TOO HIGH
POSSIBLE CAUSES
GENERATOR FIELD DRIVER CIRCUIT SHORT TO GROUND
GENERATOR SHORTED
PCM DEFECTIVE (CHARGING SYSTEM)
PCM BATT TEMP NOT W/I þ12 DEGREES C (10 DEGREES F) UNDER HOOD TEMP
PCM VOLT & TARGET CHARGING VOLT DIFFER BY > 1.0 V
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
With the DRB, actuate the Generator Field Driver.
Using a voltmeter, backprobe the Generator Field Driver Circuit voltage in back of
Generator.
Does the DRB show voltage shift low to high?All
Ye s®Go To 2
No®Go To 6
2 Ignition On, Engine Not Running
With the DRB, stop the Generator Field Driver actuation.
Read the target charging voltage.
Is the target charging voltage between 13.0 to 14.9 volts?All
Ye s®Test Complete.
No®Go To 3
3 Engine running.
Manually set the engine speed to 1600 RPM.
With the DRB, read both the voltage and the target charging voltage.
Compare the9target9to the9volt9reading.
Watch for up to 5 minutes, if necessary, for a 1.0 volt difference or more.
Was there more than a 1.0 volt difference?All
Ye s®Replace PCM.
Perform Powertrain Verification Test VER-3A.
No®Go To 4
4 Ignition On, Engine Not Running
Using the DRB Temperature Probe, measure the under hood temperature near PCM.
With the DRB, read the BTS temperature.
Is the Battery Temperature within þ12 degrees C (10 degrees F) of the under hood
temperature?All
Ye s®Go To 5
No®Replace PCM.
Perform Powertrain Verification Test VER-3A.
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CHARGING
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TEST ACTION APPLICABILITY
5 Turn ignition on, engine not running.
Erase trouble codes.All
Refer to symptom * CHARGING SYSTEM NO CODE TEST in the
CHARGING category.
6 Ignition Off
Disconnect the Field Harness Connector at back of Generator.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure resistance of one of the Generator Field Terminals at
the Generator to Ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair or replace the shorted Generator as necessary.
Perform Powertrain Verification Test VER-3A.
No®Go To 7
7 Ignition Off
Disconnect the PCM Connector.
Disconnect the Field Harness Connector at back of Generator.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the Generator Field Driver Circuit from PCM Connec-
tor to ground.
Is the resistance below 5.0 ohms?All
Ye s®Repair the Generator Field Driver Circuit short to ground.
Perform Powertrain Verification Test VER-3A.
No®Go To 8
8 Ignition off.
If there are no potential causes remaining, the PCM is assumed to be defective.
View repair optionsAll
Repair
Replace the Powertrain Control Module.
Perform Powertrain Verification Test VER-3A.
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CHARGING
P-1594 CHARGING SYSTEM VOLTAGE TOO HIGH ÐContinued
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Symptom:
P-1682 CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored and Set Condition:
P-1682 CHARGING SYSTEM VOLTAGE TOO LOW
When Monitored: With no other charging system codes set. With the ignition on and the
engine running above 1500 RPM.
Set Condition: The battery sensed voltage is 1 volt below the charging system goal for 25
seconds. The PCM senses the battery voltage, turns off the field driver and senses the
battery voltage again. If the voltages are the same, the code is set.
POSSIBLE CAUSES
ASD RELAY OUTPUT CIRCUIT OPEN
GENERATOR FIELD DRIVER CIRCUIT OPEN
GENERATOR DEFECTIVE
GENERATOR DEFECTIVE (B)
PCM DEFECTIVE
TEST ACTION APPLICABILITY
1 Start engine, and allow it to idle.
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
With the DRB, read the Target Charging voltage.
Is the Target Charging voltage above 15.1 volts?All
Ye s®Go To 2
No®Go To 6
2 Ignition On, Engine Not Running
Using DRB Temperature Probe, measure the under hood temperature near PCM.
With the DRB, read the Ambient/BAT Temp.
Is the battery temperature within þ12 degrees C (10 degrees) of the under hood
temperature?All
Ye s®Go To 3
No®Replace the PCM.
Perform Powertrain Verification Test VER-3A.
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CHARGING
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TEST ACTION APPLICABILITY
3 Ignition Off
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
Disconnect the Generator Field Connector.
Disconnect PCM connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the ASD Output Circuit from PCM
Connector to Field Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the ASD Relay Output Circuit, open circuit.
Perform Powertrain Verification Test VER-3A.
4 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 5
No®Repair the open Driver Circuit.
Perform Powertrain Verification Test VER-3A.
5 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.
6 Ignition Off
Note: Battery must be fully charged.
Note: Generator Belt tension and condition must be checked before con-
tinuing.
Disconnect the Generator Field Connector.
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Using an Ohmmeter, measure the resistance of the ASD Output Circuit from PCM
Connector to Field Connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 7
No®Repair the ASD Relay Output Circuit, open circuit.
Perform Powertrain Verification Test VER-3A.
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CHARGING
P-1682 CHARGING SYSTEM VOLTAGE TOO LOW ÐContinued
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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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