KENR9126 133
Troubleshooting Section
Expected Result:
All connectors, pins, and sockets should be
completely coupled and/or inserted. The harness
should be free
of corrosion, abrasion and/or pinch
points.
Results:
•
OK – Proceed to Test Step 2.
•
Not OK
Repair: Per
form the following repair:
Repair the connectors and/or the harness, or
replace th
e connectors and/or the harness. Ensure
that all of the seals are correctly in place and
ensure that the connectors are completely coupled.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair el
iminates the fault.
STOP.
Test Step 2. Determine the Type of Fault
ontheDataLink
A. Connect
the electronic service tool to the
diagnostic connector that is on the engine harness
or on the application.
B. Turn the keyswitch to the ON position.
Expec
ted Result:
The power lamp should illuminate on the
commu
nications adapter. The power lamp on the
communications adapter may illuminate when the
keyswitch is in any position.
Results:
•
OK – T
he communications adapter is currently
receiving the correct voltage.
Rep
air: If you are redirected to this step from
“Check the wiring of the Diagnostic Connector”and
if a jumper wire has been installed between pin
“A”
on the diagnostic connector and the positive
terminal on the battery and if a jumper wire has
been installed between pin “B” on the diagnostic
co
nnector and the negative terminal on the battery,
remove the jumper wires and then repair the
harness. If the harness cannot be repaired, replace
th
e harness.
Proceed to Test Step 5.
•
Not OK – The communications adapter is not
receiving the correct voltage. Proceed to Test Step
3
.
Test Step 3. Check the Wiring of the
Diagnostic Connector
g0180199
7
Illustration 35
Typical view of the diagnostic c onnector from the wire s ide
(A) S w itc
hed battery +
(B) Batte
ry ground (GND)
(D) D ata
link +
(E) D a ta
link -
A. If the communications adapter is connected to
the diag
nostic connector on the engine, ensure
that pin “A” and pin “B” are wired on the engine
harness side of the connector.
Expected Result:
The pin
sarewired.
Results:
•
OK – The harness is fully wired. Proceed to Test
Step 4.
•
Not OK – The data link connector power
connections are not wired.
Repair: Fabricate a jumper wire in order to connect
pin “A” of the diagnostic connector to battery+ and
pin “
B” to the battery -.
ProceedtoTestStep2.
Test Step 4. Check the Battery Voltage at
the Diagnostic Co nnector
A. Tu
rn the keyswitch to the ON position.
B. Use a multimeter in order to measure the voltage
f
rom pin A (battery+) and pin B (ground) of the
diagnostic connector.
E
xpected Result:
The voltage is between 22.0 VC and 27.0 VDC for a
2
4 Volt system and between 11.0 Volts DC and 13.5
VDCfora12Voltsystem.
To Next Page
