HOSE AS 2002354 - Caterpillar

Table 2
Required Tools
Tool Part Number Part Description Qty
A 372-5260 Test Kit 1
Illustration 1 g03811016
Illustration 2 g03416459
View of the pin locations for the DEF pump on the 86-pin DCU connector
(17) DEF pump pressure sensor signal
(18) DEF pump pressure sensor ground
(19) DEF pump pressure sensor 5 VDC supply
Illustration 3 g03416460
Pin location on the DEF pump connector
(2) Pressure sensor supply
(3) Pressure sensor signal
(4) Pressure sensor returnComplete the procedure in the order in which the steps are listed.
Table 3
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Inspect the 86-pin DCU connector.
B. Inspect the connector for the DEF pump.
C. Perform a 45 N (10 lb) pull test on each of the wires in the DCU connector and the connector for the DEF pump.
D. Check all 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.
Proceed to Test Step 2.
Result: A damaged wire or damaged connector was found.
Repair: Repair the damaged wire or the damaged connector.
Use the electronic service tool to clear all logged diagnostic codes. Verify that the repair eliminates the fault.
2. Determine the Diagnostic Code
A. Establish communication between the electronic service tool and the engine Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools"
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Establish communication between the electronic service tool and the Dosing Control Unit (DCU) .
D. Check for active or logged codes.
Diagnostic trouble codes
Result: There is an active or logged 4334-3, 3090-3, 4334-4 or 3090-4 diagnostic code.
Proceed to Test Step 3.
3. Check for an Open Circuit in the Pump Electronic Tank Unit (PETU) Wiring Harness for the DEF Pump Pressure Sensor Circuit
A. Turn the