Perkins 1106D Troubleshooting Manual page 137

SENR9982
•
Not OK
Repair: Perform the following diagnostic
procedure:
Temporarily install another digital throttle position
sensor. Use the Perkins EST in order to check for
an active +8 V diagnostic code. Replace the digital
throttle position sensor if both of the following
conditions occur:
•
The fault is corrected with the new digital throttle
position sensor.
•
The fault returns after the old digital throttle
position sensor has been reconnected.
STOP.
Test Step 6. Check the Status of the
PTO On/Off Switch and the Status of
the Power Train Data Link with Perkins
Electronic Service Tool (EST)
A. Check the status of the "PTO ON/OFF Switch"
with Perkins EST in order to verify that the "PTO
ON/OFF Switch" is switched OFF. The PTO mode
may cause the ECM to ignore the digital throttle
position sensor if demand is less than the PTO
speed demand.
B. Start the engine. Use the Perkins EST in order
to monitor the throttle position status. While
the throttle position status is being monitored,
depress the throttle pedal and release the throttle
pedal. The throttle position status and the engine
should respond to the change in the throttle pedal
position.
C. Go to the "Configuration Settings" portion of
Perkins EST and turn off the "Torque Speed
Control".
Note: The "Torque Speed Control" is an option that
may be installed by the OEM.
D. While the throttle position status is being
monitored, depress the throttle pedal and release
the throttle pedal. Also depress the throttle pedal
and release the throttle pedal while the engine
response is being monitored.
Expected Result:
The throttle position status and the engine should
respond to the change in the throttle pedal position.
Result 1 The digital throttle position sensor functions
correctly.
Result 2 The throttle response is limited by a "Torque
Speed Control" message.
Result 3 The PTO limits the throttle response.
Results:
•
Result 1 – The digital throttle position sensor is
operating correctly. Continue troubleshooting until
the original condition is resolved. STOP.
•
Result 2 – If the engine responds with the "Torque
Speed Control Link" in a disabled condition and
the engine does not respond with the "Power Train
Data Link" in an enabled condition, a component
of the "Power Train Data Link" is causing the
response fault of the digital throttle position sensor.
Refer to the OEM dealer in order to repair the faulty
component of the "Power Train Data Link". STOP.
•
Result 3 – The ECM is operating in PTO mode.
Repair: If the PTO should not be active, refer to the
following diagnostic procedure: Troubleshooting,
"PTO Switch Circuit - Test"
STOP.
Test Step 7. Disconnect the Power
Supply Connections for the Digital
Throttle Position Sensor at the ECM
A. Turn the keyswitch to the OFF position.
B. Disconnect the P1 OEM connector. Remove the
P1:43 (8V). Remove the P1:33 (digital throttle
position sensor ground) from the P1 OEM
connector.
C. Reconnect the P1 OEM connector to J1.
D. Turn the keyswitch to the ON position.
E. Use Perkins EST to check for active diagnostic
codes.
Expected Result:
One of the following diagnostic codes is still active
after the terminals for sensor power have been
disconnected:
•
41-03
•
41-04
Results:
•
OK
Repair: Perform the following repair:
137
Troubleshooting Section