Scan Tool Setup and Functionality

SCAN TOOL SETUP AND FUNCTIONALITY

Connect the scan tool to the data link connector (DLC) for communication with the vehicle.

The DLC is located in the driver's side compartment. It is attached to the instrument panel under the steering column and accessible from the driver seat.

The DLC is rectangular in design and capable of accommodating up to 16 terminals. The connector has keying features to allow easy connection.

The required scan tool functions are described below:
- monitor, record, and playback of parameter identification (PID)s
- freeze frame PID data
- diagnostic test modes; self-test, clear diagnostic trouble codes (DTCs)
- output test mode
- resetting keep alive memory (KAM)
- diagnostic monitoring test results (mode 6) for on board diagnostic (OBD) on board monitors
- on board system readiness (OBD monitor completion status)
- resetting the diesel particulate filter parameters
- initiate a manual diesel particulate filter regeneration
- high pressure fuel system test
- power balance test

Some of these functions are described. Refer to the scan tool manufacturer's manual for specific information on the scan tool setup, operation, and specific cables and adapters required.

Diesel Particulate Filter Manual Regeneration

WARNING: Initiate a manual regeneration of the diesel particulate filter only when the vehicle is on the ground with the area around the tailpipe free of people, obstructions, foreign material or other items. Manual regeneration causes the exhaust gas to quickly get VERY HOT. Failure to follow these instructions may result in serious personal injury.

The diesel particulate filter manual regeneration function commands the powertrain control module (PCM) to carry out a diesel particulate filter regeneration. When the diesel particulate filter manual regeneration is initiated the PCM checks several operating conditions to determine if the diesel particulate filter manual regeneration can begin. The engine speed may increase during the diesel particulate filter manual regeneration.

Certain customer driving habits may prevent a complete regeneration from occurring during normal operation. This function may be used to assist in diagnosing a diesel particulate filter concern related to customer driving habits. The diesel particulate filter manual regeneration function is located on the scan tool under the toolbox tab. Select Powertrain, Service Functions, PCM to access the diesel particulate filter manual regeneration function.

High Pressure Fuel System Test
The high pressure fuel system test commands the PCM to increase the engine speed and fuel pressure. The test increases the fuel pressure to a maximum pressure of 170 MPa (24,650 psi) in several increments. The high pressure fuel system test monitors the amount of time the vehicle is able to maintain the requested fuel pressures. This procedure may be used to assist in diagnosing several driveability concerns. The high pressure fuel system test is located on the scan tool under the toolbox tab. Select Powertrain, Fuel, Fuel System Test to access high pressure fuel system test.

Power Balance Test
The power balance test determines the relative power contribution of each engine cylinder. During the power stroke of each cylinder the test monitors the acceleration of the crankshaft. The crankshaft acceleration is recorded and displayed in firing order for all cylinders. This procedure may be used to assist in diagnosing a low contributing cylinder or injector concern.