Scan Tool Testing and Procedures

SCAN TOOL HOOK-UP

- Connect the diagnostic adapter inline between the scan tool and the diagnostic connector located in the engine compartment.
NOTE: Connections must be made to both the six and fifteen pin connectors.
- With the scan tool properly connected, all character positions on the display should briefly illuminate, and the copyright message should appear.
- After about three seconds, the copyright message should be replaced by the opening menu.
NOTE: At any time after the copyright screen, the user may press the F3 key for help.
- A commonly reported problem is that the scan tool screen is blank. If the screen is blank after the scanner is attached to the vehicle, do the following:
Make sure all cable connections are properly seated and fit snugly.
Make sure the cables are in good condition (no broken or shorted wires).
Check the diagnostic connector for available voltage to the adapter.
Make sure the cartridge is installed properly into the scan tool.
NOTE: Even with a defective scan tool or adapter, the screen usually is not blank when the scan tool is connected to the vehicle. If the screen is blank, and the above checks show good, try the scan tool on another vehicle. This may help to isolate a defective component.

ACCESSING AND DELETING FAULT CODES

CAUTION: Be sure to apply parking brake and/or block wheels before performing idle check or adjustment, or any engine running tests.
1. Connect the scan tool to the diagnostic connector located in the engine compartment near the Single Board Engine Controller (SBEC).
2. If possible, START the engine, turn ON the air conditioning, and shift the transmission selector through all of the gears, returning to PARK (A/T) or NEUTRAL (M/T). Turn OFF the air conditioning and shut OFF the engine.
3. Turn ON the ignition switch and observe the CHECK ENGINE LAMP. It should light for approx. 2 seconds then go out. Access "Read Fault Data" on the scan tool and record any fault codes received.
NOTE: Refer to FAULT CODE IDENTIFICATION AND DIAGNOSTIC CHART REFERRAL for a listing of fault codes and related diagnostic routines.
4. Access "Erase Fault Data" and erase the fault code memory.