(Table 225, contd)
Troubleshooting Test Steps
Values Results
9. Create an Open Circuit at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the throttle position sensor with the -4 diagnos-
tic code.
C. Turn the keyswitch to the ON position. Wait for at least 10
seconds for activation of the diagnostic codes.
D. Use the electronic service tool to check the “Active Diag-
nostic Codes” screen on the electronic service tool. Check for
an -3 diagnostic code.
E. Turn the keyswitch to the OFF position.
Diagnostic codes Result: An -4 diagnostic code was active before discon-
necting the sensor. An -3 diagnostic code is active with
the sensor disconnected.
Repair: Install a replacement analog throttle position
sensor.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: The -4 diagnostic code is still active with the
sensor disconnected.
Proceed to Test Step 10.
10. Check the Sensor Signal Wire for a Short Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect throttle position sensor. Disconnect
the P1 connector from the ECM.
C. Measure the resistance between the suspect sensor signal
terminal and all other terminals on the P1 connector.
Greater than 100
Ohms
Result: At least one of the resistance measurements is
less than 100 Ohms - There is a short in the wiring
harness.
Repair: Repair the faulty wiring or replace the faulty
wiring.
Result: All resistance measurements are greater than
100 Ohms.
Contact the Dealer Solutions Network (DSN).
i06167057
Speed Control - Test
(PWM)
Use this procedure if the digital throttle position
sensor is suspected of incorrect operation. This
procedure also covers the following diagnostic
codes:
424 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
