2010 Cadillac CTS Sedan AWD V6-3.0L Page 1535

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1535

2. Connect a test lamp between the enable circuit terminal 13 of the fuel pump control module and ground.

3. Ignition ON, command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF as commanded.

瀚慖f the test lamp remains OFF all the time, test for a short to ground or an open/high resistance on the enable circuit. If circuit/connections

test normal, replace the K20 ECM.

瀚慖f the test lamp remains ON all the time, test for a short to voltage on the enable circuit. If circuit/connections test normal, replace the K20

ECM.

4. Ignition ON, test for 2-3 V on the enable circuit terminal 13 of the fuel pump control module.

瀚慖f not within the specified range, replace the K20 ECM.

5. If all circuits/connections test normal, replace the K27 fuel pump 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 ECM or fuel pump control module replacement, setup,

and programming

P0630

DTC P0601-P0604, P0606, P0607, P0610, P062B, P062F, P0630, P16F3, or P2610 (ECM, LF1)

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 Descriptors

DTC P0601

- Control Module Read Only Memory Performance

DTC P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory Performance

DTC P0606

- Control Module Processor Performance

DTC P0607

- Control Module Performance

DTC P0610

- Control Module Vehicle Options Incorrect

DTC P062B

- Control Module Fuel Injector Control Performance

DTC P062F

- Control Module Long Term Memory Performance

DTC P0630

- VIN Not Programmed or Mismatched - Engine Control Module (ECM)

DTC P16F3

- Control Module Redundant Memory Performance