2001 CHRYSLER VOYAGER relay

POSSIBLE CAUSES
A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND CIRCUIT
ECM - 5-VOLT SUPPLY CIRCUIT
ECM - A/C PRESSURE SENSOR SIGNAL
ECM - SIGNAL VOLTAGE HIGH
TEST ACTION APPLICABILITY
1NOTE: If DTC P0641 or P0651 is present with this DTC, diagnose DTCs
P0641 and P0651 before diagnosing this DTC.
NOTE: Ensure the A/C refrigerant System is properly charged per the
Service Information.
Start the engine.
With the DRBIIIt, read the A/C Pressure Sensor voltage.
Select the choice that best reflects the DRBIIItreading.All
Above 4.6 volts
Go To 2
Between 0.7 and 4.6 volts
Go To 9
Below 0.7 volt
Go To 10
2 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the ECM harness connector.
Measure the resistance between the A/C Pressure Sensor Signal circuit and the 5-volt
Supply circuit in the A/C Pressure Sensor harness connector.
Is the resistance above 100k ohms?All
Ye s®Go To 3
No®Repair the A/C Pressure Sensor Signal circuit for a short to the
5-volt Supply circuit.
Perform ROAD TEST VERIFICATION - VER-2.
3 Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Sensor Ground circuit at the A/C Pressure Sensor and
ECM harness connectors.
Is the voltage above 1.0 volt at either connector?All
Ye s®Repair the A/C Pressure Sensor Ground circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No®Go To 4
NOTE: If the Sensor Ground circuit had a short to voltage on it, the ECM
may have been damaged. Retest the A/C Pressure Sensor circuit.
11 3
DRIVEABILITY - DIESEL
P0530-A/C PRESSURE SENSOR CIRCUIT PLAUSIBILITY ÐContinued

Symptom List:
P0560-SYSTEM VOLTAGE TOO LOW
*CHECKING THE CHARGING SYSTEM OPERATION - DIESEL
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0560-SYSTEM VOLTAGE TOO
LOW.
When Monitored and Set Condition:
P0560-SYSTEM VOLTAGE TOO LOW
When Monitored: With the engine running.
Set Condition: The ECM detects the system voltage at least 0.5 volt below the target
charging voltage for at least 3 seconds.
POSSIBLE CAUSES
CHECK FOR CYCLING VOLTAGE ON THE GENERATOR FIELD DRIVER CIRCUIT
INTERMITTENT CONDITION
GENERATOR BELT CONDITION OR TENSION
HIGH RESISTANCE IN THE FUEL HEATER RELAY OUTPUT CIRCUIT TO THE ECM
GENERATOR FIELD DRIVER CIRCUIT SHORTED TO VOLTAGE
GENERATOR FUSED B+ CIRCUIT HIGH RESISTANCE
ECM/PCM RELAY OUTPUT CIRCUIT OPEN
GENERATOR GROUND CIRCUIT HIGH RESISTANCE
GENERATOR FIELD DRIVER CIRCUIT OPEN
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1NOTE: If there are any Battery Sense DTCs (P1511 or P1512) present with
this DTC, diagnose the Battery Sense DTCs first.
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the
Generator capacity.
NOTE: The battery must be fully charged before continuing.
Inspect the generator belt condition and tension.
Is the generator belt in good condition and tensioned properly?All
Ye s®Go To 2
No®Repair as necessary.
Perform CHARGING VERIFICATION - VER-3.
120
DRIVEABILITY - DIESEL

TEST ACTION APPLICABILITY
2 Turn the ignition on.
With the DRB, actuate the Generator Field.
Measure the voltage between ground and the Generator Field Driver circuit by back
probing the Generator Field harness connector with a voltmeter.
NOTE: The voltage should cycle from Battery voltage to below 2.0 volts
every 1.4 seconds.
While monitoring the voltmeter, wiggle the generator field harness and connectors
between the generator, ECM and the ECM/PCM Relay (in the PDC).
Was there any interruption of the normal voltage cycling?All
Ye s®Repair the harness as necessary where the wiggling caused the
interruption.
Perform CHARGING VERIFICATION - VER-3.
No®Go To 3
NOTE: With the DRB, stop the Generator Field actuation.
3 Connect the positive lead of a voltmeter to the generator B+ (12V) terminal and the
negative lead to the battery positive (+) post.
WARNING: 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.
Start the engine.
Is the voltage on the voltmeter below 0.4 volt?All
Ye s®Go To 4
No®Repair the Generator Fused B+ circuit for high resistance.
Perform CHARGING VERIFICATION - VER-3.
4 Connect the positive lead of a voltmeter to the generator case (housing) and the
negative lead to the battery negative (-) post.
WARNING: 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.
Start the engine.
Is the voltage on the voltmeter below 0.4 volt?All
Ye s®Go To 5
No®Repair the Generator Ground circuit for high resistance.
Perform CHARGING VERIFICATION - VER-3.
5 Turn the ignition off, then on.
With the DRB, read and record the Battery Voltage.
With a voltmeter, measure and record the voltage between the Battery terminals.
Compare the DRB Battery Voltage reading to the voltmeter reading.
Is the difference between the two readings less than 0.5 volt?All
Ye s®Go To 6
No®Go To 7
121
DRIVEABILITY - DIESEL
P0560-SYSTEM VOLTAGE TOO LOW ÐContinued

TEST ACTION APPLICABILITY
6WARNING: 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.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was 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 CHARGING VERIFICATION - VER-3.
No®Test Complete.
7 Turn the ignition off.
With a voltmeter, measure and record the voltage between the Battery terminals.
Disconnect the ECM harness connectors.
Turn the ignition on.
Measure the voltage of the Fuel Heater Relay Output circuit in the ECM C1 harness
connector.
Are the voltage measurements within 0.5 volt of each other?All
Ye s®Go To 8
No®Repair the Fuel Heater Relay Output circuit to the Engine
Control Module for high resistance.
Perform CHARGING VERIFICATION - VER-3.
8 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Generator Field harness connector.
Remove the ECM/PCM Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Generator Field Driver circuit.
Is the voltage below 0.5 volt?All
Ye s®Go To 9
No®Repair the Generator Field Driver circuit for a short to voltage.
Perform CHARGING VERIFICATION - VER-3.
122
DRIVEABILITY - DIESEL
P0560-SYSTEM VOLTAGE TOO LOW ÐContinued

TEST ACTION APPLICABILITY
9 Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the ECM/PCM Relay from the PDC.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the ECM/PCM Relay Output circuit in ECM harness
connector C1, cavities 4 and 5.
Is the voltage above 10.0 volts?All
Ye s®Go To 10
No®Repair the ECM/PCM Relay Output circuit for an open.
Perform CHARGING VERIFICATION - VER-3.
10 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Generator Field harness connector.
Measure the resistance of the Generator Field Driver circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 11
No®Repair the Generator Field Driver circuit for an open.
Perform CHARGING VERIFICATION - VER-3.
11 If there are no possible causes remaining, view repair. All
Repair
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform CHARGING VERIFICATION - VER-3.
123
DRIVEABILITY - DIESEL
P0560-SYSTEM VOLTAGE TOO LOW ÐContinued

Symptom:
P0615-STARTER RELAY CIRCUIT SHORT CIRCUIT
When Monitored and Set Condition:
P0615-STARTER RELAY CIRCUIT SHORT CIRCUIT
When Monitored: With the ignition on.
Set Condition: The ECM detects a short to voltage on the Starter Relay Control circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
SUBSTITUTE ECM/PCM RELAY
STARTER RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase ECM DTCs.
Attempt to start the engine several times, pausing for at least 10 seconds between
each cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC reset?All
Ye s®Go To 2
No®Go To 4
2 Turn the ignition off.
Install a substitute relay in place of the Starter Relay.
Attempt to start the engine several times, pausing for at least 10 seconds between
each cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC reset?All
Ye s®Go To 3
No®Replace the Starter Relay.
Perform ROAD TEST VERIFICATION - VER-2.
3 Turn the ignition off.
Remove the Starter Relay from the IPM.
Turn the ignition on.
Measure the voltage of the Starter Relay Output circuit.
Is the voltage below 1.0 volt?All
Ye s®Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No®Repair the Starter Relay Output circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
124
DRIVEABILITY - DIESEL

TEST ACTION APPLICABILITY
4WARNING: 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.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was 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 ROAD TEST VERIFICATION - VER-2.
No®Test Complete.
125
DRIVEABILITY - DIESEL
P0615-STARTER RELAY CIRCUIT SHORT CIRCUIT ÐContinued

P0620-GENERATOR FIELD CONTROL MALF SHORT CIRCUIT
When Monitored: With the ignition on.
Set Condition: The ECM detects a short to voltage on the Generator Field Control circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
GENERATOR FIELD
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE
GENERATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND
GENERATOR FIELD CONTROL CIRCUIT OPEN
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase ECM DTCs.
Perform several ignition cycles, turning the ignition off for at least 10 seconds
between each ignition cycle.
Monitor the DRB for ECM DTCs.
Did this DTC reset?All
Ye s®Go To 2
No®Go To 7
2 Turn the ignition off.
Disconnect the Generator Field harness connector.
Measure the resistance of the Field Control terminals on the back of the Generator.
Is the resistance between 2 and 6 ohms?All
Ye s®Go To 3
No®Repair or replace the Generator as necessary.
Perform CHARGING VERIFICATION - VER-3.
3 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Generator Field harness connector.
Remove the ECM/PCM Relay from the PDC.
Connect a jumper wire between cavity 1 and cavity 4 of the ECM/PCM Relay
connector.
Turn the ignition on.
Measure the voltage of the Generator Field Control circuit.
Is the voltage below 0.5 volt?All
Ye s®Go To 4
No®Repair the Generator Field Control circuit for a short to voltage.
Perform CHARGING VERIFICATION - VER-3.
127
DRIVEABILITY - DIESEL
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE DEVI-
ATION TOO HIGH Ð
Continued