(Table 236, contd)
Troubleshooting Test Steps
Values Results
4. Verify that the Diagnostic Code is Still Active
A. Turn the keyswitch to the ON position. Wait at least 10 sec-
onds for activation of the diagnostic codes.
B. Use the electronic service tool to check for active diagnostic
codes. Record all active diagnostic codes.
Diagnostic codes Result: An XXXX-4 diagnostic code is active at this
time.
Proceed to Test Step 5.
Result: An XXXX-3 diagnostic code is active at this
time.
Proceed to Test Step 7.
Result: No diagnostic codes are active at this time. An
intermittent fault may exist.
Repair: Use the electronic service tool to perform a
“Wiggle Test” . If faults are indicated, then go to the ap-
propriate procedure.
5. Create an Open Circuit at the Valve Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the valve with the XXXX-4 di-
agnostic code.
C. Remove the wire for the position sensor signal from the har-
ness connector for the valve.
D. Reconnect the connector for the valve.
E. Turn the keyswitch to the ON position. Wait for at least 10
seconds for activation of the diagnostic codes.
F. Use the electronic service tool to check the “Active Diagnos-
tic Code” screen. Check for an XXXX-3 diagnostic code.
G. Turn the keyswitch to the OFF position.
Open circuit Result: An XXXX-4 diagnostic code was active before
removing the signal wire. An XXXX-3 diagnostic code
became active after removing the signal wire.
Repair: Disconnect the connector for the valve.
Reconnect the signal wire for the position sensor. Re-
connect the connector for the valve.
Turn the keyswitch to the ON position. Use the electronic
service tool to check for active diagnostic codes. If the
XXXX-4 diagnostic code returns, there is a short in the
valve.
Install a replacement valve. Refer to Disassembly and
Assembly for the correct procedure.
Use the electronic service tool to clear all logged diag-
nostic codes and verify that the repair eliminates the
fault.
Result: There is still an XXXX-4 diagnostic code active
with the signal wire removed. The valve position sensor
is OK.
Repair: Return all wires to the original configuration.
Proceed to Test Step 6.
(continued)
448 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
