Illustration 128 g06206555
Schematic diagram for the aftertreatment power relay
Not all connectors are shown. Refer to the appropriate Electrical Schematic.
Complete the procedure in the order in which the
steps are listed.
Table 205
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Check that the fuses are not blown.
B. Inspect the terminals on the aftertreatment power relay. Re-
fer to Troubleshooting, “Electrical Connector - Inspect” for
details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the
ECM connector that are associated with the aftertreatment
power relay.
D. Check the screw for the ECM connector for the correct tor-
que of 6 N·m (53 lb in).
E. Check the harness for abrasion and pinch points from the
aftertreatment power relay back to the ECM.
Loose connection
or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring
harness. Ensure that all the seals are properly in place and
ensure that the connectors are correctly coupled.
Replace any blown fuses.
Use the electronic service tool to clear all logged diagnostic
codes.
Use the electronic service tool to perform the “Aftertreat-
ment System Functional Test” to verify that the repair elimi-
nates the fault.
Result: All connectors, pins, and sockets are correctly
coupled and/or inserted. The harness is free of corrosion,
abrasion, and pinch points. The fuses are not blown.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position.
Note: Do not start the engine.
C. Use the electronic service tool to check for active diagnos-
tic codes.
Diagnostic codes Result: Diagnostic code 5965-5 or 3838-5 is active or re-
cently logged.
Proceed to Test Step 3.
Result: Diagnostic code 5965-6 or 3838-6 is active or re-
cently logged.
Proceed to Test Step 5.
(continued)
UENR4469-36 371
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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