2010 Cadillac Truck Escalade AWD V8-6.2L Page 2120

7. Ignition OFF, remove the jumper wires from the previous step.

8. Measure for 2-3 volts between each of the following circuits and ground on the ECM side of the harness connector:

* The KS signal circuit, terminal A

* The KS signal circuit, terminal B

锟斤拷If less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the

ECM.

锟斤拷If greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the ECM.

9. Test for intermittent or poor connections at the ECM, KS, and in-line connectors where present.

10. If all circuits test normal, replace the ECM.

Repair Instructions

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

* Knock Sensor 1 Replacement (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and Repair/Knock

Sensor 1 Replacement)

* Knock Sensor 2 Replacement (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and Repair/Knock

Sensor 2 Replacement)

* Engine Control Module Replacement (See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and

Repair)

* Engine Control Module Programming and Setup (See: Powertrain Management/Computers and Control Systems/Engine Control

Module/Testing and Inspection)

P0328

DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333

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 P0324

- Knock Sensor (KS) Module Performance

DTC P0325

- Knock Sensor (KS) Circuit Bank 1

DTC P0326

- Knock Sensor (KS) Performance

DTC P0327

- Knock Sensor (KS) Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor (KS) Circuit High Voltage Bank 1

DTC P0330

- Knock Sensor (KS) Circuit Bank 2

DTC P0332

- Knock Sensor (KS) Circuit Low Voltage Bank 2

DTC P0333

- Knock Sensor (KS) Circuit High Voltage Bank 2

Diagnostic Fault Information