2001 CHRYSLER VOYAGER Service Manual

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Page 1345 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom List:
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE
DEVIATION TOO HIGH
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE
DEVIATION TOO LOW
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLT

Page 1346 of 4284

CHRYSLER VOYAGER 2001 Service Manual 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
INTERMI

Page 1347 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect ECM harness connectors.
Disconnect the Generator Field harness connector.
Measure the resistance between ground and the Generator Field Co

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect ECM harness connectors.
Disconnect the Generator Field harness connector.
Measure the resistance between ground and the Generator Field Control circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 5
No®Repair the Generator Field Control circuit for a short to ground.
Perform CHARGING VERIFICATION - VER-3.
5 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Generator Field harness connector.
Measure the resistance of the Generator Field Control circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 6
No®Repair the Generator Field Control circuit for an open.
Perform CHARGING VERIFICATION - VER-3.
6 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.
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.
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.
128
DRIVEABILITY - DIESEL
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE DEVI-
ATION TOO HIGH Ð
Continued

Page 1348 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom:
P0627-FUEL LIFT PUMP RELAY CONTROL CIRCUIT OPEN CIR-
CUIT
POSSIBLE CAUSES
INTERMITTENT CONDITION
IGNITION SWITCH (RUN/START) CIRCUIT OPEN
FUEL LIFT PUMP RELAY
FUEL LIFT PUMP RELAY CONTROL CIR

Page 1349 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
4 Turn the ignition off.
Install a substitute relay in place of the Fuel Lift Pump Relay.
Turn the ignition on.
With the DRB, actuate the Fuel Lift Pump Relay.
Does the Fuel

Page 1350 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom:
P0627-FUEL LIFT PUMP RELAY CONTROL CIRCUIT SHORT CIR-
CUIT
POSSIBLE CAUSES
INTERMITTENT CONDITION
FUEL LIFT PUMP RELAY
FUEL LIFT PUMP RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
ENGINE CONTROL M

Page 1351 of 4284

CHRYSLER VOYAGER 2001 Service Manual TEST ACTION APPLICABILITY
4 Turn the ignition off.
Remove the Fuel Lift Pump Relay from the IPM.
Remove the ECM/PCM Relay from the IPM.
Connect a jumper wire between cavity 30 and cavity 87 of the ECM

Page 1352 of 4284

CHRYSLER VOYAGER 2001 Service Manual Symptom List:
P0641-SENSOR REFERENCE VOLTAGE A CKT VOLTAGE TOO
HIGH
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO
HIGH
Test Note: All symptoms listed above are diagnosed using the same tests.
The t

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