BAR AS-EQUALIZER 3T2307 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with one of the supply circuits or if any one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table    
Code    Conditions which Generate this Code    System Response    
41-3 8 Volt DC Supply : Voltage Above Normal     The 8 volt power supply is above normal for two seconds.     The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.    
41-4 8 Volt DC Supply : Voltage Below Normal     The 8 volt power supply is below normal for two seconds.    
262-3 5 Volt Sensor DC Power Supply : Voltage Above Normal     The 5 volt power supply is above normal for two seconds.    
262-4 5 Volt Sensor DC Power Supply : Voltage Below Normal     The 5 volt power supply is below normal for two seconds.    Refer to Troubleshooting, "Component Location" for graphics that show the location of the sensor's on the in-line engines and on the vee engines.5 Volt Power SupplyThe Electronic Control Module (ECM) supplies 5.0 0.5 VDC to these sensors:
Filtered engine oil pressure
Crankcase pressure
Inlet air temperature
Fuel temperature
Engine oil temperature
Unfiltered engine oil pressure
Desired speed potentiometerThe ECM can be configured for one of these types of speed control:
0 to 5 V potentiometer
4 to 20 mAThe desired speed potentiometer (if equipped) must be supplied with +5 VDC from the ECM. If the desired speed potentiometer has a short circuit or the potentiometer's wiring has a short circuit, a 262-03 or 262-04 diagnostic code may be activated. There are no diagnostic codes for the circuit of the desired speed potentiometer.
Illustration 1 g01442989
Control Panel (if equipped) (1) Desired speed potentiometerThe internal circuits for J2-2 (sensor supply) and J2-18 (speed control supply) are wired to