Monday, November 15, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 1616

2010 Cadillac Truck SRX FWD V6-3.0L Page 1616



LAU Engine



1. Verify that a test lamp illuminates between the G13 generator B+ terminal A X2 and ground.



瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



2. Ignition OFF, disconnect the X1 harness connector at the G13 generator.



3. Ignition ON, test for less than 1 V between the control circuit terminal 1 and ground.



瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



4. Engine running, test for greater than 3.5 V between the control circuit terminal 1 and ground.



瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the K20 ECM.



5. If the circuit tests normal, replace the G13 generator.



LF1 Engine



1. Verify that a test lamp illuminates between the G13 generator B+ terminal A X2 and ground.



瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



2. Ignition OFF, disconnect the X1 harness connector at the G13 generator.



3. Ignition ON, test for 4.5-5.5 V between the control circuit terminal 1 and ground.



瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.



瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal replace



the K20 ECM.



4. If the circuits test normal, replace the G13 generator.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Generator Replacement (LF1) (See: Starting and Charging/Charging System/Alternator/Service and Repair)Generator Replacement (LAU)



(See: Starting and Charging/Charging System/Alternator/Service and Repair)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming



P0622



DTC P0622



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptor



DTC P0622



- Generator F-Terminal Circuit



Diagnostic Fault Information



Circuit/System Description

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