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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (5.7L - DTCS P0456 To P0629) >> DTC Troubleshooting >> P0622-Generator Field Control Circuit/Open >> When Monitored And Set Conditions

When Monitored And Set Conditions

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This diagnostic runs continuously when the following conditions are met:

Set Conditions: 

Default Actions: 

Possible Causes
ALTERNATOR FIELD CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
ALTERNATOR FIELD CONTROL CIRCUIT OPEN/HIGH RESISTANCE
ALTERNATOR FIELD CONTROL CIRCUIT SHORTED TO GROUND
POOR ENGINE BLOCK OR ALTERNATOR CASE GROUND
ALTERNATOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .