2010 Cadillac CTS Sedan AWD V6-3.0L Page 1485

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1485

Fuel Pump Control Module

1. Ignition OFF, disconnect the harness connectors at the K27 fuel pump control module.

2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ohms between the ground

circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Verify that a test lamp illuminates between the IGN/B+ circuit terminals listed below and ground:

* Terminal 15

* Terminal 17

* Terminal 32

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

4. If all circuits test normal, replace the K27 fuel pump control module.

Transmission Control Module

1. Ignition OFF, disconnect the harness connectors at the K71 transmission control module.

2. Ignition OFF, and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ohms between the ground

circuit terminal 5 listed below and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the IGN/B+ circuit terminals listed below and ground:

* Terminal 4

* Terminal 9

* Terminal 12

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

4. If all circuits test normal, replace the K71 transmission control module.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for the appropriate control module replacement, setup,

and programming

P0563

DTC P0563

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 P0563

- System Voltage High

Diagnostic Fault Information

Circuit/System Description