CARRIER ASSEM. 1T0731 - Caterpillar

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.
Illustration 1 g03741437
Table 2
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 DEF pump harness.
D. Measure the resistance between the following pins:
- Pin 1 and Pin 18 SCR controller J1 connector
- Pin 2 and Pin 44 SCR controller J1 connector
- Pin 3 and Pin 45 SCR controller J1 connector
Open Circuit
Result: There were less than 10 ohms of resistance between all the pins.
Proceed to Test Step 6.
Result: There