Snap-On Diagnostics DGA 1000, Manual, Page: 66 / 116

3-18
Vehicle Testing
Catalytic Converter Test Set-up
✓
Two people are required for this procedure.
1. Connect the oil temperature probe and RPM pickup. Insert
the exhaust probe.
2. Input the vehicle information.
3. Start procedure. Information displays on the Start
Procedure Screens.
✓
Beginning with step 4, items shown in Bold type are
instructions which display directly on the screen.
✓
Starting with step 6, the test must be completed within 5
minutes.
✓
It is strongly recommended you practice this procedure
and become familiar with it before attempting to diagnose
a customer vehicle.
4. Start the engine and run at high idle until the oil
temperature is > 176°F or select the right (
) arrow key
and ENTER to continue.
Engine warmed when oil temperature >80 degrees C
—
Oil temperature and RPM display.
5. Continue to run engine at high speed to preheat the
catalyst.
Catalyst preheating (counts down).
6. Turn engine off and:
Disable ignition
Disable injection (5 min. count down to allow time to
accomplish.)
Press ENTER when ready.
7. Depress accelerator
Ready to crank in 5s
8. Cranking (counts down).
—
CO
2
and
HC
values are displayed while cranking to
clear residual gases in exhaust system.
— Stop cranking
— Release pedal
— Press ENTER to continue.