User manual
IEIMobile Solution
www.ieimobile.com
OBD-II provides access to numerous data from the engine control unit (ECU) and offers a valuable
source of information when troubleshooting problems inside a vehicle:
Wide DC Input Range
IEIMobile’s in-vehicle computers are designed with a wide DC input range from 9V to 36V. This protects the device from malfunctioning when the
vehicle’s power system surges during peak loading and charge up.
Delay Power-On and Power-Off Setting
The power-on and power-off time can be congured with the power management software provided in the device or through BIOS. With delayed
power on and off settings, the system is protected against sudden voltage surges as the ACC turns on or shuts down.
On-Board Diagnostics (OBD-II) OBD and CAN-bus
In-Vehicle Power Design
Pin
Description
1
Manufacturer discretion. GM: J2411 GMLAN/SWC/Single-Wire
CAN.
2
Bus positive Line of SAE-J1850 PWM and SAE-1850 VPW
3
Ford DCL(+) Argentina, Brazil (pre OBD-II) 1997-2000, Usa,
Europe, etc. Chrysler CCD Bus(+)
4
Chassis ground
5
Signal ground
6
CAN high (ISO 15765-4 and SAE-J2284)
7
K line of ISO 9141-2 and ISO 14230-4
8
-
9
-
10
Bus negative Line of SAE-J1850 PWM only (not SAE-1850 VPW)
11
Ford DCL(-) Argentina, Brazil (pre OBD-II) 1997-2000, Usa,
Europe, etc. Chrysler CCD Bus(-)
12
-
13
-
14
CAN low (ISO 15765-4 and SAE-J2284)
15
L line of ISO 9141-2 and ISO 14230-4
16
Battery voltage
■ On-Board Diagnostics, or OBD, in an automotive context, is a generic term
referring to a vehicle's self-diagnostic and reporting capability. OBD systems give
the vehicle owner or a repair technician access to state-of-health information for
various vehicle sub-systems.
■ OBD-II is a standard that species the type of diagnostic connector and its pin-
out, the electrical signaling protocols available, and the messaging format.
■ Almost all of the automobiles produced today are required, by law, to provide an
interface for connecting a diagnostic test equipment.
OBD-II Cable
There are ve signalling protocols currently in use with the OBD-II interface. Any given vehicle will likely only implement one of the
protocols.
■ SAE J1850 PWM (pulse-width modulation - 41.6 kB/sec, standard of the Ford Motor Company)
■ SAE J1850 VPW (variable pulse width - 10.4/41.6 kB/sec, standard of General Motors)
■ ISO 9141-2. K-line and L-line. This protocol has an asynchronous serial data rate of 10.4 kBaud. It is primarily used in Chrysler, European,
and Asian vehicles.
■ ISO 14230 KWP2000 (Keyword Protocol 2000)
■ ISO 15765 CAN (250 kBit/s or 500 kBit/s). The CAN protocol is a popular standard outside of the US automotive industry and is making
signicant in-roads into the OBD-II market share. By 2008, all vehicles sold in the US will be required to implement CAN, thus eliminating
the ambiguity of the existing ve signalling protocols.
● The special MCU enables system to
automatically reboot or shutdown based
on the adjustable delay time by detecting
ACC status.
● Surge protection and low power
consumption hardware design
VCC
GND
ACC
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
MCU
SYSTEM
3.3 V
Power
Shutdown ag
3.3 V/5V
Standby
Power
Ignition
Signal
● Vehicle speed
● Engine RPM
● Total fuel used (litre since life time)
● High resolution vehicle distance
● Engine coolant temperature
● Vehicle ambient temperature
● Tachograph information
● Total engine hours (h)
● Fuel level (0–100 %)
● Fuel pressure
● Fuel system status
● DTC (Diagnostic Trouble Code)
● Calculated engine load
● Intake air temperature
● Throttle position
● Accelerator pedal position (0–100 %)
● Axle weight (kg)
● Oxygen sensors and status
● Clutch switch (on/off)
● Brake switch (on/off)
● Cruise control (on/off)
● PTO (Status/Mode)
LOCK ACC ON START
ACC Signal off On On off
Car Cigarette Lighter off On On off
5V Standby Power off
On after 1
second
On On
Auto Start-up --
After 10~60 seconds
(selectable)
--
Auto Shut-down
After
10~180 secs
(selectable)
-- --
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
L
O
C
K
A
C
C
O
N
S
T
A
R
T
IEIMobile-2013-V10