Actron Professional Enhanced Scan Tool 9640A, User Manual

Page: 57 / 126

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GM Enhanced (OBD II) Diagnostics
5
Select View Data from theGM Func-
tion List and press
ENTER
.
GM arranges the PIDs in four groups:
❒
Analog: viewing of analog sensor
signals, such as measured volt-
age from O2 sensors, tempera-
ture sensors, and air flow
sensors.
❒
O2: viewing oxygen sensor information.
❒
Misfire: viewing of cylinder misfire information.
❒
Digital: viewing of switches, solenoids and relays.
✓
Some GM trucks manufactured in 1996 – 1998 have only one PID group.
For these vehicles, the selection menu does not appear.
After selecting a group, the scan tool
asks the vehicle to provide the PIDs it
supports for that group.
The scan tool displays a menu with dis-
play options. Use the
UP/DOWN
to
select an option and press
ENTER
.
Refer to “ Viewing Data” on page 3-9 to
setup the data list.
After making a selection, press
ENTER
to establish a communication link. Mul-
tiple PIDs may be sent if the vehicle is equipped with more than one computer
module — Powertrain Control Module (PCM), Transmission Control Module
(TCM), etc. The scan tool identifies them by their identification names (ID)
assigned by the manufacturer (i.e. $40 or $1F).
If the Scan Tool receives multiple
responses for a PID, such as MIL STA-
TUS, it displays the PID and with the
computer module ID blinking in paren-
theses.
If one or more modules stops responding, the scan tool displays a message that
the module is not responding and asks to continue without it. If No is selected,
the Scan Tool attempts to reestablish communication with that module.
GM Function List |
4)Erase Codes ]
` 5)View Data [
6)View Freeze Data ~
Select Pid Group |
` Analog
O2 [
Misfire ~
Validating PID Map
PID 23 of 99
Please Wait
Select Data To View
` Entire Data List
Custom Data List
View Data Setup ~
MIL STATUS($10) ON
MIL STATUS($1A) OFF
ENGINE(RPM)($10) 256[
ENGINE(RPM)($1A) 261~