Perkins NJ Series Troubleshooting Manual page 178

178
Troubleshooting Section
E. Select the "Throttle Configuration" option on
the Perkins EST. Select the appropriate analog
"Throttle Configuration" summary from the menu
on the left of the screen. The IVS window for the
throttle will indicate "YES" if an IVS is installed.
Make a note of the "Idle Validation Min OFF
Threshold" parameters that are displayed in the
"Throttle Configuration" menu of the Perkins
EST. Make a note of the "Idle Validation Max ON
Threshold" parameters that are displayed in the
"Throttle Configuration" menu of the Perkins EST.
F. Select the "Throttle status" function on the Perkins
EST. Select "Status" function and then select
"Throttles" function.
G. The throttle is set in the low idle position.
H. Depress the throttle pedal slowly. The IVS status
should change from CLOSED (ON) to OPEN
(OFF).
Expected Result:
The IVS state changes from CLOSED (ON) to OPEN
(OFF).
Results:
• OK – The IVS state changes from CLOSED (ON)
to OPEN (OFF). Proceed to Test Step 2.
• Not OK – The IVS does not operate.
Repair:
Proceed to Test Step 3.
Test Step 2. Check the Idle Validation
Switch (IVS) Threshold
A. Connect the Perkins EST to the diagnostic
connector.
B. Turn the keyswitch to the ON position.
C. Use the Perkins EST in order to check the current
"Throttle Configuration".
D. Select the "SERVICE" option from the drop-down
menu of the Perkins EST.
E. Select the "Throttle Configuration" option on
the Perkins EST. Select the appropriate analog
"Throttle Configuration" summary from the menu
on the left of the screen. The IVS window for the
throttle will indicate "YES" if an IVS is installed.
Make a note of the "Idle Validation Min OFF
Threshold" parameters that are displayed in the
"Throttle Configuration" menu of the Perkins
EST. Make a note of the "Idle Validation Max ON
Threshold" parameters that are displayed in the
"Throttle Configuration" menu of the Perkins EST.
F. To select the "Throttle status" function on the
Perkins EST, select "Status" function and then
select "Throttles" function.
G. The throttle is set in the low idle position.
H. Depress the throttle pedal slowly. The IVS status
should change from CLOSED (ON) to OPEN
(OFF).
Expected Result:
The IVS switch operates between the "Idle Validation
Min OFF Threshold" and the "Idle Validation Max ON
Threshold" parameters. Use the Perkins EST in order
to view the parameters of the IVS switch.
Results:
•
OK – The IVS switch operates within the "Idle
Validation Min OFF Threshold" and the "Idle
Validation Max ON Threshold" parameters. Use
the Perkins EST in order to view the parameters of
the IVS switch. STOP.
•
Not OK – The IVS switch cannot operate within the
"Idle Validation Min OFF Threshold" and the "Idle
Validation Max ON Threshold" parameters. Use
the Perkins EST in order to view the parameters
of the IVS switch.
Repair:
Proceed to Test Step 7.
Test Step 3. Inspect Electrical Connectors
and the Harness
A. Inspect the P1/J1 connector, the harness and
all of the connectors for the IVS. Refer to
Troubleshooting, "Electrical Connectors - Inspect"
for details.
B. Perform a 45 N (10 lb) pull test on each of the
wires in the ECM connector that are associated
with the suspect analog throttle switch:
• P1:35
SENR9982-01