Perkins NJ Series Troubleshooting Manual page 208

208
Troubleshooting Section
Results:
• OK – Proceed to Test Step 2.
•
Not OK
Repair: Repair the circuit.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
Test Step 2. Check the "PTO Mode
Switches" on the Perkins Electronic
Service Tool (EST)
A. Turn the keyswitch to the OFF position.
B. Connect the Perkins Electronic Service Tool (EST)
to the diagnostic connector.
C. Turn the keyswitch to the ON position.
D. Observe the status of the PTO mode switch on the
Perkins EST while you operate the "PTO ON/OFF
switch" from the ON position to the OFF position.
E. Use the Perkins EST in order to observe the
status of the PTO mode switch while you operate
the "PTO Set/Lower switch" from the OFF position
to the ON position.
F. Use the Perkins EST in order to observe the
status of the PTO mode switch while you operate
the "PTO Raise/Resume switch" from the OFF
position to the ON position.
Expected Result:
Result 1 The Perkins EST will show that the "PTO
mode ON/OFF switch" is in the OPEN condition when
the control switch is OFF.
The Perkins EST will show that the "PTO mode
ON/OFF switch" is in the CLOSED condition when
the control switch is ON.
Note: The PTO mode lamp should be OFF when the
switch is in the OFF position. The lamp should be
flashing when the switch is in the ON position.
Result 2 When the "PTO mode Set/Lower switch" is
in the OFF position the switch should be in the OPEN
position.
When the "PTO mode Set/Lower switch" is in the ON
position the "PTO mode Set/Lower switch" should be
in the CLOSED position.
Result 3 When the "PTO mode Raise/Resume
switch" is in the OFF position the display screen
should show an OPEN condition.
When the "PTO mode Raise/Resume switch" is in
the ON position the display screen should show a
CLOSED condition.
Note: The "PTO mode lamp" will flash when the
"PTO mode" is switched ON. The PTO mode lamp
should change from flashing to ON when the PTO
mode Set/Lower switch is CLOSED. The PTO mode
lamp should change from flashing to ON when the
PTO mode Raise/Resume switch is CLOSED.
Results:
•
OK – The PTO mode switches operate correctly.
STOP.
• Not OK – Proceed to Test Step 3.
Test Step 3. Check the Status of the PTO
Mode Disengage Switches
A. Use the Perkins EST in order to observe the
switch status while the PTO mode disengage
switches are operated OFF and ON.
Note: The PTO mode disengage switches usually
function by the operation of the brake, clutch or the
operator switch. These switches should be operated
separately for this test.
Expected Result:
When the PTO mode is switched ON, the Perkins
EST will show that the "PTO mode disengage
switches" are in the "ENGAGED" position. If the
"PTO mode disengage switches" is activated, the
Perkins EST will show the status of the "PTO mode
disengage switches". If the "PTO mode disengage
switches" are activated, the Perkins EST will show
that the "PTO mode disengage switches" are in the
"DISENGAGED" position.
Results:
•
OK – The "PTO mode disengage switches"
operate correctly. STOP.
• Not OK – Proceed to Test Step 4.
Test Step 4. Check the Suspect PTO
Switch
A. Turn the keyswitch to the OFF position.
B. Remove the two wires from the suspect switch.
Use a suitable jumper in order to join the two
wires together.
SENR9982-01