(Table 165, contd)
4. Check the Wiring for an Open Circuit
A. Disconnect the P1 connector from the ECM.
B. Measure the resistance between terminal 4 on the 31-pin
connector (ECM side) and P1:2.
C. Measure the resistance between terminal 4 on the 31-pin
connector (ECM side) and P1:3.
Less than 2
Ohms
Result: Both resistance measurements are less than 2
Ohms.
Contact the Dealer Solutions Network (DSN).
Result: At least one of the resistance measurements is great-
er than 2 Ohms.
Repair: Replace the wiring between the 31-pin connector
and the ECM.
5. Create an Open Circuit at the 31 Pin Connector
A. Disconnect the 31-pin connector.
B. Remove the wire from terminal 4 of the 31-pin connector
on the engine ECM side of the connector.
C. Reconnect the 31–pin connector.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for active diagnos-
tic codes.
F. Turn the keyswitch to the OFF position.
Diagnostic codes Result: A -5 diagnostic code is active with the wire
disconnected.
Reconnect the disconnected wire.
Proceed to Test Step 8.
Result: The -6 diagnostic code is still active with the wire
disconnected.
Reconnect the disconnected wire.
Proceed to Test Step 6.
6. Check the Wiring for a Short Circuit
A. Disconnect the P1 connector from the ECM.
B. Measure the resistance between P1:2 and all other termi-
nals on the P1 connector except P1:3.
C. Measure the resistance between P1:3 and all other termi-
nals on the P1 connector apart from P1:2.
Greater than 1 K
Ohms
Result: All resistance measurements are greater than 1 K
Ohms.
Proceed to Test Step 7.
Result: At least one of the resistance measurements is less
than 1 K Ohms.
Repair: Replace the wiring between the 31-pin connector
and the ECM.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
(continued)
298 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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