Mitchell Diagnostics MD-500 - OBDII Diagnostics Overview; OBDII Overview; Diagnostic Functions

en-US
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18
| User Manual |
MD-500
1699503426 | REV A | 05.2021
© Mitchell International
OBDII
Overview
OBDII (also referred to as Generic OBDII) provides limited
engine control and monitors the diagnostic control network of
the vehicle. When a fault in the control network occurs, a
DTC is recorded in the vehicle computer. This system is not
vehicle specic so it is NOT necessary to select the vehicle to
run a generic test.
NOTE: Enhanced OBDII may be selected from the Diagnostics menu
with a vehicle loaded for more specic Mode 6 test information.
Diagnostic Functions
After selecting a vehicle the user will be able to begin using
diagnostic functions on the vehicle.
1. Select OBD-II from the Main Menu screen.
2. Follow the prompts on the screen.
Readiness Monitors
Mode 1 displays available monitor information.
The OBDII system has a series of systems that run self-tests.
These systems or components have to be made ready by
turning on the ignition or manipulating the system in some
other manner. This is called drive cycle.
Each system requires specic vehicle drive cycle and
operating requirements to take place before the monitor
self-check will run. OBDII systems require one monitor for
current systems, or two monitors for older systems, are ready
before testing can begin.
If the system is ready, no further action is required.
If the system is not ready, a drive cycle may need to be
performed for that system.
Use the following procedure to verify the system is ready to
be monitored.
1. View the readiness table to verify system status.
• Ready: No further action is required.
• Not ready: Further action is required. Drive Cycle
needs to be performed.
• Monitor not supported: Data is not supported on
vehicle.
Readiness Mode Button Denitions
Help
Help
Selecting Help will open an online user manual.
Use Metric Units
Use Metric Units
Selecting Metric Units will switch from English/Standard
Units to Metric Units
Use English/Standard Units
Use English/Standard Units
Selecting English/Standard Units will switch from Metric
Units to English/Standard Units.
Data Stream
Mode 1 views live vehicle sensor data.
The data stream function shows live sensor and solenoid
data streaming from the vehicle’s electronic control unit
(ECU).