Perkins NJ Series Troubleshooting Manual page 215

SENR9982-01
Illustration 92
Typical view of the pin locations for the throttle switch on the P1 connector
(35) Switch return
(52) Throttle position switch 1
Test Step 1. Inspect Electrical Connectors
and Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the P1/J1 connector and
any other connectors that are included in the
OEM application for this throttle switch. Refer to
Troubleshooting, "Electrical Connectors - Inspect"
for details.
C. Perform a 45 N (10 lb) pull test on each of the
wires in the sensor connector and the ECM
connector that are associated with the active
diagnostic code. Refer to illustration 92.
D. Verify that the latch tab of the connector is
correctly latched. Also verify that the latch tab of
the connector has returned to the fully latching
position.
E. Check the screw for the ECM connector for the
correct torque of 5.0 N·m (44 lb in).
F. Check the harness for corrosion, abrasion, and
pinch points from the throttle switch to the ECM.
Expected Result:
All connectors, pins, and sockets should be
completely inserted and coupled. The harness should
be free of corrosion, abrasion and pinch points.
Results:
• OK – Proceed to Test Step 2.
(51) Throttle position switch 2
(50) Throttle position switch 3
• 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 "Throttle Cab Switch
Position" on the Perkins Electronic
Service Tool (EST)
A. Connect Perkins Electronic Service Tool (EST) at
B. Turn the keyswitch to the ON position.
C. Observe the status of the throttle switch and the
Results:
•
OK – The throttle switch is functioning correctly
at this time.
Repair: Refer to Troubleshooting, "Electrical
Connectors - Inspect" if the fault is intermittent.
STOP.
• Not OK – Record the suspect input. Proceed to
Test Step 3.
(49) Throttle position switch 4
the diagnostic connector.
throttle inputs on Perkins EST while you operate
the throttle switch in each position.
215
Troubleshooting Section
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