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5.6 Testing 26-pin interface for
OBD external
(with CAN protocol)
i For functional testing of the OBD/
CAN circuit board and the
connection cable to the vehicle
control unit, you will need the short
circuit plug KS 350 and the adapter
cable AL 350
(both customer service tools are
obtainable from Müller Elektronik).
Loop test
Procedure:
1. To open this, press the F2 key on your
keyboard, or click with the mouse on
F2
, the Customer Service
menu.
2. Perform the loop test by
pressing the F1 key on your keyboard
or by double clicking with the mouse
on the Loop Test button.
3. Plug the KD adapter cable AL 350
into the OBD/CAN connection
cable.
4. Plug the banana plugs B+ (red) and
GND (black) of the KD adapter cable
AL 350 into the B+ and B- sockets of
the P 100 or a stabilized DC + 12V
power supply.
5. If the loop test has proceeded
without errors, the following
message will be displayed: BsTest
"Loop" "SDTEST" $0000
"LBCCTEST" $0000 "DLCTEST"
§0000 "CANTEST §0000.
The critical aspects are the "§"
numeric values following "xxTEST".
If the loop test has proceeded
without errors these will be shown as
"$00" .
i If an error message has been
generated, the test must be repeated
using the short circuit plug KS 350.
This will narrow down the error.
Key to "xxTEST":
"SDTEST" = Testing the ISO
interface
"LBCCTEST" = Testing the SAE
interface
"DLCTEST" = Testing the SAE
interface
"CANTEST" = Testing the CAN
interface
See section 8.12 for error messages for
"xxTEST".
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