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en | 8 | User guide | HDS 200 HD Scan Tool for Class 4-8 Diesel, Light and Medium Vehicles
•
Ability for vehicle systems to record operating condi-
tions when a fault occurs.
•
Expanded diagnostic capabilities that records a
code whenever a condition occurs that affects
vehicle emissions.
•
Ability to clear stored codes from the vehicle's
memory with a scan tool.
3.4
SAE Publications
SAE has published hundreds of pages of text defining a
standard communication protocol that establishes hard-
ware, software, and circuit parameters of OBD II sys-
tems. Unfortunately, vehicle manufacturers have differ-
ent interpretations of this standard communications
protocol. As a result, the generic OBD II communications
scheme varies, depending on the vehicle. SAE publishes
recommendations, not laws, but the Environmental
Protection Agency (EPA) and California Air Resources
Board (CARB) made many of SAE's recommendations
legal requirements that vehicle manufacturers were
required to phase in over a three-year period. Beginning
in 1994, vehicles with a new engine management com-
puter (about 10% of each manufacturers fleet) were sup-
posed to comply with OBD II standards. For 1995, OBD
II systems were to appear on about 40% of the new
vehicles sold in the United States. Some of the 1994-
1995 OBD II systems were not fully compliant, so the
Government granted waivers to give manufacturers time
to fine-tune their systems. Beginning in 1996, most of
the new vehicles sold in the United States were fully
OBD II compliant.
3.5
Data Link Connector (DLC)
The data link connector (DLC) allows the scan tool to
communicate with the vehicle's computer(s). Use the
proper DLC adapter cable to connect the scan tool to
the vehicle. Also, the vehicle's DLC may be found in
several different places and have many different configu-
rations.
IMPORTANT
Power to the tool generally comes from
the vehicle. If the tool does not power-up,
use the included cigarette lighter cable
(7-0135) to power-up the tool.
J1939 Type 2
The J1939 Type 2 is a round 9-pin green DLC adapter
cable (1699200242). This cable will work on trucks with
older J1939 Type 1 and new J1939 Type 2 DLCs.
The vehicle DLC is generally mounted inside the cab.
For on road heavy trucks, the connector should be
mounted on the driver side. For busses, the vehicle DLC
should be mounted within reach of the operators seat.
Attach the 9-pin green adapter cable (1699200242) to
the extender cable (7-0137) (both supplied with the
scan tool) to connect the tool.
581618 | REV. A | 11.2017
J1708/J1587
The J1708/J1587 connector is a round 6-pin gray DLC
adapter cable (1699200241).
Attach the 6-pin grey adapter cable (1699200241) to the
extender cable (7-0137) (both supplied with the scan
tool) to connect the tool.
OBD II (J1962)
Beginning in 1996, vehicles sold in the United States use
the J1962 (OBD II) DLC, a term taken from a physical
and electrical specification number assigned by the SAE
(J1962). The DLC should be located under the dash-
board on the driver's side of the vehicle. If the DLC is
not located under the dashboard as stated, a decal
describing its location should be attached to the dash-
board in the area the DLC should have been located. For
more information on OBD II connectors, go to
http://www.obdclearinghouse.com.
Because the OBD II J1962 connector has power and
ground, you only need a single cable connection to the
tool for both power and vehicle communications. Attach
the OBD II adapter cable (1699200243) to the extender
cable (7-0137) (both supplied with the scan tool), to
connect the tool. Certain pins in the connector are
reserved.
Bosch Automotive Service Solutions Inc.
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