Connecting the Vehicle to HDS

To make your HDS screen appear like Graphs 1-5, follow the steps outlined below:

1. Connect HDS to the vehicle, enter "SIMU-TECH", then select "SIGNAL WAVEFORMS".

2. At the signal selection screen, select "ORDER", and then select "BY NAME". Then select "CANISTER CLOSE VALVE", "CANISTER PURGE SOLENOID", and "DIFFERENTIAL PRESSURE SENSOR".

3. Select "OPTIONS", and select "ANALOG RECORD".

4. Select "CTRL" (control), select "MS/DIV", and then select "300 MS/DIV".

5. Select "OK", then select "RUN".

6. Start the vehicle and look at your watch (the self test occurs 16 minutes and 48 seconds after start-up).

7. After start-up, verify that the voltage for the canister close valve and canister purge valve is approximately 13.5 volts, and the DPS reads approximately 1.6-2.7 volts depending how recently the purge control solenoid was last activated. The self check will not occur if the DPS is below 1.6 volts. If the DPS is below 1.6 volts, stop here and perform troubleshooting procedure P0446 in this TSIB.

8. After 15 minutes, begin watching the "CAN CLOS" (Canister Close Valve) signal.

9. As soon as the canister close valve voltage drops to near zero, wait 39 seconds.

10. Touch the screen to stop recording.

11. Select "OPTIONS", then "DATA PLAYBACK".

12. Select "ZOOM", then select "-32". The screen will now look similar to graphs 1-5 on pages 6-10 of this TSB. You may have to SCROLL the data FORWARD or BACKWARD to get the data onto your screen.