(Table 186, contd)
Troubleshooting Test Steps
Values Results
3. Check the IVS Threshold
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position.
C. Use the electronic service tool in order to check the current
“Throttle Configuration” .
D. Select the “SERVICE” option from the drop-down menu of
the electronic service tool.
E. Select the “Throttle Configuration” option on the electronic
service tool. Select the appropriate “Throttle Configuration”
summary from the menu on the left of the screen. The IVS win-
dow for the throttle will indicate “YES” if an IVS is installed.
Make a note of the “Idle Validation Min OFF Threshold” param-
eters that are displayed in the “Throttle Configuration” menu of
the electronic service tool. Make a note of the “Idle Validation
Max ON Threshold” parameters that are displayed in the
“Throttle Configuration” menu of the electronic service tool.
F. To select the “Throttle status” function on the electronic serv-
ice tool, select “Status” function and then select “Throttles”
function.
G. The throttle is set in the low idle position.
H. Operate the throttle slowly. The IVS status should change
from CLOSED (ON) to OPEN (OFF).
IVS operates within
threshold.
Result: The IVS switch operates within the “Idle Valida-
tion Min OFF Threshold” and the “Idle Validation Max
ON Threshold” parameters.
The IVS is operating correctly.
Return the engine to service.
Result: The IVS switch cannot operate within the “Idle
Validation Min OFF Threshold” and the “Idle Validation
Max ON Threshold” parameters.
Proceed to Test Step 9.
4. Inspect Electrical Connectors and the Harness
A. Inspect the P1/J1 connectors, the harness and all of the con-
nectors for the IVS. Refer to Troubleshooting, “Electrical Con-
nectors - 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 idle valida-
tion switch.
C. Check the screw for the ECM connector for the correct tor-
que of 6 N·m (53 lb in).
D. Check the harness for abrasion and pinch points from the
throttle switch to the ECM.
Loose connection or
damaged wire
Result: Faults found in harness or connectors.
Repair: Repair the connectors or the harness and/or re-
place the connectors or the harness. Ensure that all of
the seals are correctly in place and ensure that the con-
nectors are correctly connected.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the repair
eliminates the fault.
Result: No harness or connector faults found.
Proceed to Test Step 5.
(continued)
338 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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