Perkins 1104E Series Troubleshooting Manual page 133

RENR2696-01
Test Step 9. Check the Throttle Position
Sensor at the ECM.
Illustration 49
Connections of the ECM terminals
A. Turn the keyswitch to the OFF position.
B. Remove terminal 16 from P1.
C. Connect a multimeter to terminal 16 and terminal
44.
D. Turn the keyswitch to the ON position.
E. Use the multimeter to display the output signal of
the throttle position sensor while the engine speed
control is moved from the minimum position to the
maximum position.
F. Turn the keyswitch to the OFF position and
connect terminal 16 to the P1 connector.
Expected Result:
The position should be between 10 and 22 percent in
the low idle position.
The position should be between 75 and 90 percent
in the high idle position.
Results:
•
OK – The ECM terminals have the correct signal
for the throttle position sensor.
Repair: Check for the proper supply voltage at
the ECM. If the voltage is correct, then the ECM
is suspect.
1. Temporarily connect a test ECM.
Note: The test ECM should be programmed with the
correct software. All parameters should be set to the
same value of the suspect 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 suspect ECM.
STOP.
•
Not OK – There is a fault in the harness or the
connectors between the sensor and the ECM.
Check the terminals between the machine interface
connector and the throttle position sensor. Repair
the damaged cables or replace the damaged
cables. Check that the repairs have eliminated the
fault. STOP.
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Troubleshooting Section
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