PUMP GP-F TFR 10R1260 - Caterpillar

Use this procedure to troubleshoot a problem with the NOx sensor supply. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
Table 1
J1939 Code and Description CDL Code and Description Comments
3216-6
Aftertreatment #1 Intake NOx : Current Above Normal 3002-6
Engine Exhaust NOx Level Sensor : Current Above Normal A short circuit has been detected in the circuit for the NOx sensor power supply
3226-6
Aftertreatment #1 Outlet NOx : Current Above Normal 3609-6
Aftertreatment #1 Outlet #1 NOx Level Sensor : Current Above Normal A short circuit has been detected in the circuit for the NOx sensor power supply
Illustration 1 g03741044
Table 2
Troubleshooting Test Steps Value Results
1. Check for Codes
A. Turn the DC breaker, located in the power distribution box, to the ON position.
B. Connect Cat® Electronic Technician (ET) to the service tool connector.
C. Determine if a code is active or logged.
Codes
Result: A -6 code for a NOx sensor is active or logged.
A short circuit in the wiring harness between the Electronic Control Module (ECM) and the NOx sensor power supply has been detected.
Repair: Repair or replace the wiring harness.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).