VALVE GP-CONTROL 3T6443 - Caterpillar

The Engine Control Module can control a starting aid system. Typical starting aid systems will inject ether into the intake manifold in order to aid starting of the engine during cold weather operation. Table 1 lists the diagnostic codes that apply to the outputs for the starting aid system.
Table 1
Diagnostic Trouble Codes for the Starting Aid System
J1939 Code Code Description Information
626-5 Engine Start Enable Device 1 : Current Below Normal This code indicates that the current flow through the circuit for the starting aid is low. This condition is usually caused by an open wire. The problem may be in a connector.
626-6 Engine Start Enable Device 1 : Current Above Normal This code indicates that the current flow through the circuit for the starting aid is high. This condition is usually caused by moisture or debris in a connector.
Follow the troubleshooting procedure in order to identify the root cause of the problem. Programmable Parameters"Starting Aid Output" - This "Output Selection" parameter indicates the P1 terminal that is controlling the starting aid system. This parameter must be programmed to match the vehicle's wiring in order for the starting aid system to work correctly. The ECM does not attempt to control a starting aid system if this parameter is programmed to "None"."Starting Aid On/Off Switch" - This "Input Selection" parameter indicates the P1 terminal that is connected to the optional starting aid switch. This parameter must be programmed correctly in order for the ECM to receive the input from the switch. The ECM does not look for a starting aid switch if this parameter is programmed to "None".The ECM provides nine output terminals that can be used to control the