LOCKWASHER VE CONNECTOR 8N1537 - Caterpillar

Illustration 1 g00650545
The EMCP II+ monitors the battery voltage in order to protect the EMCP II+ from a battery problem or from a charging problem. The battery voltage is received from the engine electronic control module (ECM) by the CAT data link. If you receive an CID 168 E fault, see the Troubleshooting, " 3500B Generator Set Engines Troubleshooting". The GSC+ treats a CID 168 fault as an alarm fault. The threshold for a CID 168 FMI 04 fault for battery voltage is less than 18 DCV for 24 volt system and for a 32 volt system.
Table 1
Possible Causes for CID 168 Faults    
Location that the Fault is Displayed On    Diagnostic Code    Battery Voltage Thresholds
(24 Volt System)    Battery Voltage Thresholds
(32 Volt Systems)    
Engine ECM     CID 168 E 00     The engine is running and the battery voltage is greater than 32 DCV more than two seconds.     -    
Engine ECM     CID 168 E 01     The engine is not running and the battery voltage is less than 9 DCV for more than two seconds.     -    
Engine ECM     CID 168 E 02     The engine is not running and the battery voltage is less than 9 DCV for a period of .07 seconds and then returns to 9 DCV or above. The other possible cause of the fault is the battery voltage is was less than 9 DCV three times in seven seconds.        
GSC+     CID 168 FMI 03     -     Regardless of engine status, the battery voltage is greater than the P007 limit.    
GSC+     CID 168 FMI 04     -     Regardless of the engine status, the battery voltage is less than 18 DCV.    The setpoint for the system voltage (P007) specifies the battery voltage.24 - 24 Volt System32 - 32 Volt SystemNote: Note: The GSC+ does not receive battery power when the ECS is in the OFF/RESET position. When contact 6 is connected to one of the contacts (8, 9, 10), the GSC+ receives battery power when the ECS is in the OFF/RESET position.
Initial Procedure.Make sure that the CID 168 FMI 04 is shown on the display.
Enter service mode.
Turn the ECS to the STOP position.
Program setpoint P023 to 0. This programs the GSC+ for an MUI engine. This eliminates the engine electronic control module (ECM) as a possibility of the fault. For more information, see System Operation, "Protective Relaying Programming OP5-1".
Turn the ECS to the OFF/RESET position. Disconnect the jumper wire on the ECS that is between pin 6 and pin 9. Not all generators will have a jumper wire between pin 6 and pin 9. Proceed to Step 2.
Check the system's voltage.
Turn the ECS to the STOP.
Measure the voltage across the battery terminals.Expected Result: For a 24 volt system, the