(Table 184, contd)
Troubleshooting Test Steps
Values Results
3. Create a Short Circuit at the Relay Connector
A. Turn the keyswitch to the OFF position.
B. Remove the glow plug start aid relay.
C. Fabricate a jumper wire. Install the jumper wire between
Test Point 1 and Test Point 2 on the harness connector for the
glow plug relay. Refer to Illustration 113 . Refer to the appropri-
ate Electrical Schematic.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to select the “Glow Plug Start
Aid Override Test” to turn on the power for the glow plugs.
F. Use the electronic service tool to check for active diagnostic
codes. Wait at least 30 seconds for activation of the diagnostic
codes.
G. Turn the keyswitch to the OFF position and remove the
jumper wire.
Diagnostic code Result: A 676-6 or 2246-6 diagnostic code is active with
the jumper installed.
Install a replacement glow plug relay.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: The 676-5 or 2246-5 diagnostic code is still active.
Proceed to Test Step 4.
4. Check the Wiring Between the ECM and the Relay for
an Open Circuit
A. Verify that the keyswitch is in the OFF position.
B. Disconnect the P1 connector from the ECM.
C. Inspect the P1 connector. Refer to Troubleshooting, “Elec-
trical Connectors - Inspect” for details.
D. Measure the resistance between Test Point 1 on the har-
ness connector for the relay and P1:8.
E. Measure the resistance between Test Point 2 on the har-
ness connector for the relay and the ground source.
Refer to the appropriate Electrical Schematic.
Less than 2.0
Ohms
Result: At least one of the resistance measurements is
greater than 2.0 Ohms - the fault is in the wiring between
the relay and the ECM.
Repair: Repair the faulty wiring or replace the faulty wiring.
Result: The resistance measurement is less than 2.0
Ohms.
Contact the Dealer Solutions Network (DSN).
5. Create an Open Circuit at the Relay
A. Turn the keyswitch to the OFF position.
B. Disconnect the glow plug start aid relay.
C. Use the electronic service tool to select the “Glow Plug
Start Aid Override Test” to turn on the power for the glow
plugs.
D. Use the electronic service tool to check for active diagnostic
codes. Wait at least 30 seconds for activation of the diagnostic
codes.
Diagnostic codes Result:A 676-5 or 2246-5 diagnostic code is active with the
relay disconnected.
Repair: Install a replacement glow plug start aid relay.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: The 676-6 or 2246-6diagnostic code is still active
with the relay disconnected.
Proceed to Test Step 6.
(continued)
332 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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