Perkins NJ Series Troubleshooting Manual page 136

136
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 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
connector and the negative terminal on the battery,
remove the jumper wires and then repair the
harness. If the harness cannot be repaired, replace
the 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.
Illustration 39
Typical view of the 9 pin diagnostic connectorfrom the wire side
(A) Switched battery +
(B) Battery ground (GND)
(D) Perkins Data link (PDL) +
(E) Perkins Data link (PDL) -
A. If the communications adapter is connected to
the diagnostic connector on the engine, ensure
that pin "A" and pin "B" are wired on the engine
harness side 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
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.
Proceed to Test Step 2.
Test Step 4. Check the Battery Voltage at
the Diagnostic Connector.
A. Turn the keyswitch to the ON position.
B. Use a multimeter in order to measure the voltage
from pin A (+battery) and pin B (ground) of the
diagnostic connector.
Expected Result:
The voltage is between 22.0 VDC and 27.0 VDC for
a 24 volt system and between 11.0 VDC and 13.5
VDC for a 12 volt system.
Results:
• OK – The diagnostic 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.
g01244182
Test Step 5. Check the Perkins Data Link
Connections.
A. Turn the keyswitch to the OFF position.
B. Disconnect the communications adapter from the
diagnostic connector.
C. If the diagnostic 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 P2:21 and diagnostic pin "D".
D. If the diagnostic connector is installed on the
application, 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".
SENR9982-01