Scan Tool Set-Up and Functionality

The NGS Tester or generic scan tool must be connected to the Data Link Connector (DLC) for communication with the vehicle. There is NO DTC flash-out capability.

The DLC is located in the passenger compartment. It is attached to the instrument panel and accessible from the driver's 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 vehicle connector and the test equipment connector have latching features that ensure the test equipment connector will remain mated when properly connected.

The NGS Tester is capable of multiple functions. Some of these are:
- Monitor, record, and playback of PIDs
- Freeze frame PID data
- Diagnostic test modes (self test)/clear diagnostic DTCs (PCM reset)
- Output Test Mode
- Reset Keep Alive Memory
- Digital measurement system (multimeter functionality)
- Diagnostic monitoring test results (for OBD II on-board monitors)
- On board system readiness (OBD II monitor completion status)

Refer to the NGS Tester instruction manual or generic scan tool manufacturer's manual for specific information on scan tool set-up and operation.





It is possible to receive a communication error from a scan tool when initiating a diagnostic test or accessing PIDs. The communication error can be caused by operator error, the vehicle wiring, connectors, the PCM, or other control modules connected to the DLC wiring. The PCM will respond to a scan tool whenever the tool requests a test. These are not diagnostic trouble codes. Listed are some of the numeric codes and generic descriptions that a scan tool may display when trying to perform some PCM operations. It is possible to get other numeric codes not listed. For a complete list of communication response codes, refer to Society of Automotive Engineers (SAE) document J2190 enhanced E/E Diagnostic Test Modes. Some are normal responses to valid requests. The others are communication error responses. If the tool displays any of the communication error responses, refer to Pinpoint Test Step QA1, after checking scan tool connections, cable/adapters, and entry of vehicle information. QA - Unable to Activate Self-Test/SCP Error/DTC Not Listed

Before using the scan tool to perform any test, refer to these important items:

Visual Checks
- Inspect the air cleaner and inlet ducting.
- Check all engine vacuum hoses for damage, leaks, cracks, kinks and proper routing.
- Check system wiring harness for proper connections, bent or broken pins, corrosion, loose wires, and proper routing.
- Check the Powertrain Control Module (PCM), sensors, and actuators for physical damage.
- Check the engine coolant for proper level and mixture.
- Check the transmission fluid level and quality.
- Make all necessary repairs before continuing with Quick Test.

Vehicle Preparation
- Perform all safety steps required to start and run vehicle tests. Apply parking brake, place shift lever firmly into PARK position (NEUTRAL on manual transmission) and block drive wheels.
- Turn off all electrical loads: radios, lamps, A/C, blower, and fans.
- Start engine and bring up to normal operating temperature before running Quick Test.