MICROSCAN User Manual - Snap-on

Operations Global OBD-2/EOBD
7.1.6 O2 Monitors
Figure 7-5 Sample clear codes confirmation message
Designated OBD Mode $05, this selection opens a sub-menu of tests available for the oxygen
sensor (O2S) monitoring system. Tests display on the screen with an identification (ID) number
and an abbreviated description. Complete test names are shown in the table below.
Making a selection displays and all of the pertinent O2S parameters for the specific test.
7.1.7 Non-Cont. Monitors
CLEAR CODES
To clear DTCs,
Freeze Frame,
Test Results, and
Readiness Monitors
Key on, Engine off
Press Y; Press N to exit
Table 7-1 O2 Monitor descriptions
Test ID Abbreviated Description Complete Description
$01 R/L Sensor Threshold Volt. Rich to lean sensor threshold voltage
$02 L/R Sensor Threshold Volt. Lean to rich sensor threshold voltage
$03 Low Sensor Volt Switch Time Low sensor voltage switch time
$04 Hi Sensor Volt Switch Time High sensor voltage switch time
$05 R/L Sensor Switch Time Rich to lean sensor switch time
$06 L/R Sensor Switch Time Lean to rich sensor switch time
$07 Test Cycle Min Sensor Volt Test cycle minimum sensor voltage
$08 Test Cycle Max Sensor Volt Test cycle maximum sensor voltage
$09 Time Between Sensor Trans Time between sensor transitions
Designated OBD Mode $06, this selection opens a menu of available tests on non-continuously
monitored systems. These are systems that do not directly impact vehicle emissions, but are
required to be monitored by OBD regulations. Tests display on the screen with an identification
(ID) number and an abbreviated description.
Table 7-2 Non-continuous Monitor descriptions (sheet 1 of 2)
Test ID Abbreviated Description Complete Description
$21 to $24 Catalyst Bn
$31 to $34 EGR Bn
$39 EVAP (cap off)
$3A EVAP (0.090)
$3B EVAP (0.040)
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