48
OBD-II/EOBD
OBD Diagnose
($0A) Emission Related DTC with Permanent Status
This selection displays a record of any “permanent” codes. A permanent status DTC is one that
was severe enough to illuminate the MIL at some point, but the MIL may not be on at the present
time. Even though the MIL may have been switched off by clearing codes or because the setting
conditions did not repeat after a specified number of drive cycles, a record of the DTC is retained
by the ECM. Permanent status codes automatically clear after repairs have been may and the
related system monitor runs successfully.
6.2.2 Select Communication Protocol
A communication protocol is a standardized way of data communication between an ECM and a
scan tool. Global OBD may use the following communication protocols:
•
ISO 9141-2 (K-LINE)
•
SAE J1850 PWM (Pulse Width Modulation)
•
SAE J1850 VPW (Variable Pulse Width)
•
ISO 14230-4 (Keyword Protocol 2000)
•
SAE J2284/ISO 15765-4 (CAN)
Touch
Select Communication Protocol
to open a menu of options (
).
Figure 6-9
Sample communication protocol menu
When the All Protocols setting is used the Scanner attempts to establish communication using
each protocol on order to determine which one the vehicle is broadcasting on. Select
Back
or
press the
N/X
key to return to the OBD-II/EOBD Main menu.
6.2.3 Connector Information
Opens the connector database discussed in
