BONNET-OIL COOLER 1390170 - Caterpillar

Illustration 3 g03720379
Pin locations on the DEF pump module connector (2) DEF pump motor control signal/feedback (3) DEF pump motor (+) (4) DEF pump motor (-)DEF Dosing System Verification Test This test primes the dosing system. The test is used to ensure that the DEF pump is able to build adequate pressure.This test turns on the DEF pump. During this time, the DEF pump will pressurize the entire DEF dosing system. The DEF injector will open briefly. The DEF pump will purge the system at the end of the test.Navigate to the following menu options in order to access the "DEF Dosing System Verification Test":
Diagnostics
Diagnostic Tests
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect Electrical Connectors and Wiring
A. Check the fuses.
B. Inspect the P1/J1 ECM connectors.
C. Inspect the connector for the DEF pump module.
D. Inspect the connectors for the SCR Relay.
E. Perform a 30 N (6.7 lb) pull test on each of the wires in the ECM connector and the connector for the DEF pump.
F. Check all of the wiring associated with the DEF pump for abrasions and pinch points.
   
Damaged wire or connector    
Result: A damaged wire or damaged connector was not found. The fuses are OK
Proceed to Test Step 2.
Result: A damaged wire or damaged connector was found. A fuse is blown.
Repair: Repair the damaged wire or the damaged connector. Replace any blown fuses.
Use the electronic service tool to clear all logged diagnostic codes. Verify that the repair eliminates the fault.
   
2. Check for Active or Recently Logged Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector. Refer to Troubleshooting, "Electronic Service Tools"
B. Look for active or logged diagnostic codes.
   
Diagnostic Trouble Codes    
Result: A 4374-7 or 4374-10 diagnostic code is active or recently logged.
Proceed to Test Step 3.
Result: One of the following diagnostic codes is active or recently logged:
4374-16
4374-18
4375-16
4375-18
5435-5
5435-6
5706-16
5706-18
5707-15
5707-17
Proceed to Test Step 4.
Result: A 5435-7 diagnostic code is active or recently logged.
Proceed to Test Step 7.
   
3. Check for Frozen DEF
A. If the ambient temperature is below
0° C (32° F), check that the DEF heaters are working correctly. Refer to Troubleshooting, "DEF Line Heater - Test".
   
Frozen DEF    
Result: The DEF heaters were not working correctly.
Repair: Make any necessary repairs. Refer to Troubleshooting, "DEF Line Heater - Test".
Result: The DEF lines are not frozen. The DEF heaters are working correctly.
Repair: Replace the DEF pump module.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
   
4. Check the Power Supply to the DEF Pump Motor
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the DEF pump module.
C. Turn the keyswitch to the ON position.
D. Use a multimeter to measure the voltage between terminal 3 on the harness connector for the DEF pump module and a suitable ground.
E. Turn the keyswitch to the OFF position.
   
10 V to 14 V    
Result: The measured voltage is not within the expected range.
Repair: Check the fuse. If the fuse is