P0620-Generator Field Control Malf Battery Voltage Deviation; Too High; Too Low; P0620-Generator Field Control Malf Battery Voltage Too High - DaimlerChrysler Jeep Grand Cherokee 2002 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 VOLTAGE

TOO HIGH

P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE

TOO LOW

P0620-GENERATOR FIELD CONTROL MALF CHARGING VOLTS
TOO LOW
P0620-GENERATOR FIELD CONTROL MALF HIGH GENERATOR
CURRENT
P0620-GENERATOR FIELD CONTROL MALF OPEN CIRCUIT
P0620-GENERATOR FIELD CONTROL MALF SHORT CIRCUIT
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0620-GENERATOR FIELD
CONTROL MALF BATTERY VOLTAGE DEVIATION TOO
HIGH.
When Monitored and Set Condition:

P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE DEVIATION

TOO HIGH
When Monitored: With the engine running.
Set Condition: The ECM detects the battery voltage and the ASD voltage difference is
greater than 2 volts.
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE DEVIATION
TOO LOW
When Monitored: With the engine running.
Set Condition: The ECM detects the battery voltage and the ASD voltage difference is
less than 2 volts.

P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE TOO HIGH

When Monitored: With the engine running.
Set Condition: The ECM senses battery voltage above 15.5 volts.
P0620-GENERATOR FIELD CONTROL MALF BATTERY VOLTAGE TOO LOW
When Monitored: With the engine running.
Set Condition: The ECM detects the battery voltage is less than 8.0 volts.
DRIVEABILITY - DIESEL
131