(Table 205, 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 aftertreatment power relay.
C. Fabricate a jumper wire. Install the jumper wire between
terminal 85 and terminal 86 on the harness connector for the
aftertreatment power relay.
D. Turn the keyswitch to the ON position.
E. Use the electronic service tool to check for active diagnos-
tic codes. Wait at least 30 seconds for activation of the diag-
nostic codes.
F. Turn the keyswitch to the OFF position and remove the
jumper wire.
Diagnostic code Result: A 5965-6 or 3838-6 diagnostic code is active with
the jumper installed.
Repair: Install a replacement start relay.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: The 5965-5 or 3838-5 diagnostic code is still active.
Proceed to Test Step 4.
4. Check the Relay Control Wiring 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 Connector - Inspect” for details.
D. Measure the resistance between Terminal 85 on the har-
ness connector for the aftertreatment power relay and P1:5.
E. Measure the resistance between Terminal 86 on the har-
ness connector for the start relay and P1:15.
Less than 5 Ohms Result: At least one of the resistance measurements is
greater than 5 Ohms - the fault is in the wiring for the after-
treatment power relay control circuit.
Repair: Repair the faulty wiring or replace the faulty wiring.
Result: Both resistance measurements are less than 5
Ohms.
Contact the Dealer Solutions Network (DSN).
(continued)
372 UENR4469-36
Circuit Tests
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