KENR6933 117
Troubleshooting Section
Results:
•
OK – The communications adapter is currently
receiving the correct voltage.
Repair: If you are redirected to this step from
“Check the wiring of the Diagnostic Connector”and
if a jumper wir
e has been installed between pin
“A” on the diagnostic connector and the positive
terminal on the battery and if a jumper wire has
been install
ed between pin “B” on the diagnostic
connector and the negative terminal on the battery,
remove the jumper wires and then repair the
harness. If t
he harness cannot be repaired, replace
the harness.
Proceed to Te
st Step 5.
•
Not OK – The communications adapter is not
receiving t
he correct voltage. Proceed to Test Step
3.
Test Step 3.
Check the Wiring of the
Diagnosti
c Connector
g01244182
Illustra
tion 30
Typical view of the 9 pin diagnostic connectorfrom the wire side
(A) Switched battery +
(B) Battery ground (GND)
(D) Data link +
(E) Data link -
A. If the comm
unications adapter is connected to
the diagnostic connector on the engine, ensure
that pin “A” and pin “B” are wired on the engine
harness s
ide of the connector.
Expected Result:
The pins are wired.
Results:
•
OK – The harness is fully wired. Proceed to Test
Step 4.
•
Not OK – The data link connector power
connecti
ons are not wired.
Repair: Fabricate a jumper wire in order to connect
pin “A” of the di
agnostic connector to battery+ and
pin “B” to the battery-.
Proceed to Tes
tStep2.
Test Step 4. Check the Battery Voltage at
the Diagnostic Connector
A. Turn the keyswitch to the ON position.
B. Use a multime
ter in order to measure the voltage
from pin A (+battery) and pin B (ground) of the
diagnostic connector.
Expected Result:
The voltage i
s between 22.0 Volts DC and 27.0 Volts
DC for a 24 Volt system and between 11.0 Volts DC
and 13.5 Volts DC for a 12 Volt system.
Results:
•
OK – The diag
nostic connector is currently
receiving the correct voltage. Proceed to Test Step
5.
•
Not OK – The diagnostic connector is not receiving
the correct voltage.
Repair: Refer to Troubleshooting, “Engine Wiring
Information”.
.
Proceed to
Test Step 2.
Test Step 5. Check the Data Link
Connections
A. Turn the keyswitch to the OFF position.
B. Disconnec
t the communications adapter from the
diagnostic connector.
C. If the diag
nostic connector is installed on the
application, disconnect P1 OEM connector from
connector J1. Check the resistance between
P1:23 and
diagnostic pin “D”. If the diagnostic
connector is installed on the engine, disconnect
P2 from connector J2. Check the resistance
between P
2:21 and diagnostic pin “D”.
D. If the diagnostic connector is installed on the
applica
tion, check the resistance between P1:24
and diagnostic pin “E”. If the diagnostic connector
is installed on the engine, check the resistance
between
P2:20 and diagnostic pin “E”.
Expected Result:
The resistance that is measured is less than 10
Ohms.
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