HOSE 4262204 - Caterpillar

Table 1
Possible Causes For CID 168    
Displayed On    Diagnostic Code    Battery Voltage Thresholds (24 Volt Battery System)    Battery Voltage Thresholds (24 Volt And 32 Volt Systems)    
Engine ECM     168 E 00     Engine is running, and battery voltage is greater than 32 DCV for at least two seconds    
Engine ECM     168 E 01     Engine is not running, and battery voltage is less than 9 DCV for two seconds    
Engine ECM     168 E 02     Engine running or not, and battery voltage is less than 9 DCV for 0.06 seconds and returns, or battery voltage is less than 9 DCV three times in the last seven seconds    
GSC     168 03     Engine is running or not, and battery voltage is greater than 32 DCV for a 24 volt systems or 45 DCV for a 32 volt systems    
GSC     168 04     Engine is running or not, and battery voltage is less than 18 DCV for both a 24 and a 32 volt systems.    This diagnostic code is recorded when the battery voltage is less than 18 DCV. The setpoint for system voltage (P07) specifies the battery voltage as "0" for 24 volts and "1" for 32 volts. Clear the diagnostic code from the fault log after troubleshooting is complete.This procedure is used for troubleshooting an active fault or an inactive fault. Active alarm faults are shown on the upper display when the alarm codes key is pressed and the ECS is in any position except the OFF/RESET position. Inactive alarm faults are viewed in the fault log while the operator is in service mode. See Systems Operation, "Fault Log Viewing OP1".
Verify the fault.
View the upper display and check for active diagnostic faults for the battery voltage (CID 168 FMI 4).
Enter service mode and check the fault log for inactive diagnostic faults for the battery voltage (CID 168 FMI 4 ).Expected Result: A CID 168 FMI 4 is active.Results:
No - Battery voltage diagnostic faults, DO NOT EXIST. STOP.
Yes - Battery voltage diagnostic faults, DO EXIST. Proceed to next step.
Check the voltage.
Turn the ECS to the STOP position.
Note the battery voltage that is showing on the lower display.
Measure the voltage (DCV) between the terminals of the battery.
Measure the voltage (DCV) between RM-1 ("B+") and RM-28 ("B-") of the terminal strip on the relay module. Expected Result: The three voltages (preceding step 2.b, 2.c and 2.d) should be within 2.0 volt of each other.Results:
OK - All voltages agree (less than 2.0 DCV difference). Proceed to 4.
NOT OK - Voltage measured at the batteries does not agree (greater than 2.0 DCV difference) with voltage measured at relay module terminal strip. Proceed to 3.
NOT OK - Voltage that is showing on the lower display does not agree (greater than 2.0 DCV difference) with voltage measured at relay module terminal strip. Replace the GSC. See the Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace". STOP.
Check the harness.
Disconnect