Perkins 1106D Troubleshooting Manual page 122

122
Troubleshooting Section
Test Step 3. Check the Throttle Position
with the Perkins Electronic Service Tool
(EST).
A. Connect the Perkins EST to the diagnostic
connector.
B. Turn the keyswitch to the ON position. The engine
should be off.
C. Observe the throttle position reading on the
Perkins EST.
D. Depress the throttle and release the throttle.
Expected Result:
The output should increase when the throttle pedal is
depressed.
The output should be between "20 percent" and "27
percent" at the low idle position. The output should
be between "80 percent" and "87 percent" at the high
idle position.
Results:
•
OK – The sensor is operating correctly. Proceed
to Test Step 4.
•
Not OK – The ECM is not receiving a correct
signal from the sensor. Proceed to Test Step 5.
Test Step 4. Check the Throttle Selection
Status with the Perkins Electronic
Service Tool (EST).
A. Check the status of the throttle selection switch (if
equipped). Use the Perkins EST in order to check
the status of the throttle selection switch.
Expected Result:
If the status of the throttle selection switch is shown
in the OFF position, then the throttle 1 has control of
the engine speed.
If the throttle selection switch status is shown in the
ON position, then the throttle 2 has control of the
engine speed.
The throttle may be overridden by using the SAE
J1939 (CAN) data link or the set speed control.
Results:
•
OK – The throttle demand switch is operating
correctly.
Repair: There may be an intermittent fault. Refer to
Troubleshooting, "Electrical Connectors - Inspect".
STOP.
•
Not OK – The wrong throttle is selected. Change
to the other throttle. There may be a fault with the
selector switch input.
Repair: Check the connections between the
throttle selection switch and P1:47 and P1:35.
Refer to Troubleshooting, "Electrical Connectors
- Inspect".
STOP.
Test Step 5. Check the Voltage at the
Sensor
A. Turn the keyswitch to the OFF position.
B. Install a breakout "T" with 3 terminals to the
sensor.
C. Turn the keyswitch to the ON position.
D. Measure the voltage between terminal "A" and
terminal "B".
Expected Result:
The supply voltage should be between 4.84 VDC
and 5.16 VDC.
Results:
•
OK – The supply voltage is reaching the sensor.
Proceed to Test Step 6.
• Not OK – The supply voltage is not reaching the
sensor.
Repair: Refer to Troubleshooting, "5 Volt Sensor
Supply Circuit - Test".
STOP.
Test Step 6. Check the Position of Sensor.
A. Turn the keyswitch to the OFF position.
B. Install a breakout "T" with 3 terminals to the
sensor.
C. Turn the keyswitch to the ON position.
D. Measure the voltage between terminal "C" and
terminal "B" of the breakout "T".
SENR9982