HUB 8P0062 - Caterpillar

Use this procedure to troubleshoot a problem with the Diesel Exhaust Fluid (DEF) pump motor. 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
7107-5
Aftertreatment #1 DEF Pump : Current Below Normal 3118–5
Aftertreatment #1 DEF Pump Motor Speed Sensor : Current Below Normal There is an open circuit in the Diesel Exhaust Fluid (DEF) pump feedback wiring.
7107-6
Aftertreatment #1 DEF Pump : Current Above Normal 3118–6
Aftertreatment #1 DEF Pump Motor Speed Sensor : Current Above Normal There is a short circuit in the DEF pump feedback wiring.
7107-11
Aftertreatment #1 DEF Pump : Other Failure Mode 3118–11
Aftertreatment #1 DEF Pump Motor Speed Sensor : Other Failure Mode A failed DEF Pump has been detected.
Table 2
SCR Controller Pump Diagnostic Switch
Description Pin Description Pin
Digital Return 18 C 1
Pump Diag N/O 44 NO 2
Pump Diag N/C 45 NC 3
Illustration 1 g03741437
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -5 code is active or logged.
Proceed to Test Step 2.
Result: A -6 code is active or logged.
Proceed to Test Step 3.
Result: A -11 code is active or logged.
Proceed to Test Step 5.
2. Check the Wiring to the Diesel Exhaust Fluid (DEF) Pump for an Open Circuit
A. Turn the AC and DC breakers to the OFF position.
B. Disconnect the J1 and J2 connector from the Selective Catalyst Reduction (SCR) controller.
C. Disconnect the 3-pin