Perkins NJ Series Troubleshooting Manual page 129

SENR9982-01
Note: The test ECM should be programmed with the
correct software. All parameters should be set to the
same value as the suspected ECM.
2. If the fault is eliminated with the test ECM,
install the suspect ECM and verify that the fault
returns.
3. If the fault returns replace the ECM.
STOP.
• Not OK – There is a fault in the harness or the
connectors between the sensor and the ECM.
Check all of the connections between the ECM and
the sensor. Repair the damaged cables or replace
the damaged cables. Use the electronic service
tool in order to clear all logged diagnostic codes
and then verify that the repairs have eliminated
the fault. STOP.
Test Step 8. Remove the Sensor from the
Engine Speed Control Assembly.
Illustration 32
Throttle pedal assembly
(1) Sensor mounting face
(2) Sensor drive key
(3) Mounting screw holes
Illustration 33
Throttle block assembly
(1) Mounting screw holes
(2) Sensor drive slot
(3) Sensor mounting face
A. Turn the keyswitch to the OFF position.
B. Record the position of the sensor before removing
the sensor.
C. Remove the sensor from the housing and inspect
the cables for signs of wear.
D. Connect a multimeter to terminal "C" and terminal
"B" on the breakout "T".
E. Turn the keyswitch to the ON position.
F. Record the signal voltage of the sensor with the
sensor slot in the released position.
G. Record the signal voltage of the sensor with the
sensor slot in the advanced position.
Expected Result:
The output from the sensor is 0.5 volts or less with
the sensor slot in the released position.
g01170704
The output from the sensor is 4.5 volts or more with
the sensor slot in the advanced position.
Results:
• OK
Repair: The operation of the sensor is correct.
The fault is caused by the foot pedal or the lever
assembly. Adjust the assembly or replace the
assembly.
Verify that the repairs have eliminated the fault.
STOP.
•
Not OK – The sensor is faulty.
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Troubleshooting Section
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