HOSE AS 3174142 - Caterpillar

Use this procedure if another test procedure has directed you here. Also use this procedure when there is an active fault for the current consumption on the glow plug start aid relay.Use this procedure for the following diagnostic codes:
2246-06 Glow Plug Start Aid Relay Current Above NormalThe following background information is related to this procedure:The starting aid is used to improve the engine starting when the engine is cold. When the "RUN" push button on the EMCP3 control panel is pressed, the control panel will activate the starting aid relay for a controlled period of time. While the glow plug start aid relay is activated the glow plug start aid relay will provide power to the glow plugs.
Illustration 1 g01641133
Schematic for the starting aid
Test Step 1. Inspect Electrical Connectors and Wiring
Inspect the following connectors:
EMCP3 connector
Con 1 connector on the Engine Interface Module
Inspect the terminal connections on the glow plug start aid relay. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the connectors that are associated with the glow plug starting aid.
Check the harness for abrasion and pinch points from the glow plugs back to the control panel.
Check that the fuses are not blown. Expected Result:All connectors, pins and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion and pinch points. The fuses are not blown.Results:
OK - The harness and the connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a fault with the harness and connectors.Repair: Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are completely coupled. Replace blown fuses.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair has eliminated the fault.STOPTest Step 2. Check for Active Diagnostic Codes
Connect the electronic service tool to the diagnostic connector.
Install a wire between terminal 7 and terminal 3B in the box for the control panel. Note: The engine has not been started at this Test Step.
Use the electronic service tool to select the "Glow Plug Start Aid Override Test" in order to turn on the power for the glow plugs.
Check for active diagnostic codes or recently logged diagnostic codes. Expected Result:The following diagnostic code is active or recently logged:
2246-06 Glow Plug Start Aid Relay Current Above NormalResults:
OK - The expected diagnostic code is active or recently logged. Proceed to Test step 3.
Not OK - An active diagnostic code or a recently logged diagnostic code was not displayed.Repair: Perform one of the following procedures:
If an intermittent fault is suspected, use the electronic service tool to perform a "Wiggle Test" in order to locate intermittent connections.
If there is a fault in a glow plug or a fault on the starting aid and a diagnostic code is not displayed then there may be a fault with the power circuit for the glow