
294 OBD II
READINESS TESTS
Press 7 to select <READINESS TESTS> from the <OBD II FUNCTIONS> menu. The
<READINESS TESTS> mode allows you to display the status of the vehicle's on-board
monitors, which monitor the operation of the emissions-related components. These
monitors must run in order for the DTC and test result displays to accurately reflect the
condition of the vehicle's emissions-related components.
If the vehicle contains more than one OBD II ECU, select the primary ECU for the display
of diagnostic information. Refer to Section 5.0 Displaying Data For Multiple ECUs on
page 299 for more information.
The first three display items indicate the systems or components which are continuously
monitored. If the Tester displays N/A (Not Available), the vehicle is not capable of
continuously monitoring that system.
• Misfire monitoring
• Fuel system monitoring
• Comprehensive component monitoring
The other eight display items indicate the status of the tests which are performed “once per
trip”:
• Catalyst monitoring
• Heated catalyst monitoring
• Evaporative system monitoring
• Secondary air system monitoring
• A/C system refrigerant monitoring
• Oxygen sensor monitoring
• Oxygen sensor heater monitoring
• EGR system monitoring
The systems or components listed above can be Completed (COMPL), Not Completed
(INCMPL), or Not Available (N/A).
ACTIVE KEYS
u d Move marker up or down.
! Go to <DATA LIST> mode.
# Go to <LED/LIST> mode.
( Change character size.
) Turn cursor on/off.
x Return to menu.
s Print data list.
Ah Display specifications for the highlighted parameter.
AeChange the reporting ECU.
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