PIN 2085026 - Caterpillar

The code indicates a warning for low fan speed. The warning will appear if the feedback to the Electronic Control Module (ECM) is not within 300 rpm of the commanded speed. The warning will also appear if communication to the fan has been lost.Use this procedure to troubleshoot the aftertreatment cooling fan or use this procedure if the diagnostic code in Table 1 is active or logged.Note: The following code may not be applicable for certain applications.
Table 1
J1939 Code and Description CDL Code and Description System Response
5562-1
Supplemental Fan Speed : Low - most severe (3) E1190 (3)
Supplemental Fan Speed : Low - most severe (3) The code is logged if the fan speed is not within 300 rpm of the commanded speed. On Motor Grader Applications, the code will be logged if communication for the CAN data link is lost between the Electronic Control Module (ECM) and the fan.
N/A 3548-8
Aftertreatment Cooling Fan Control Module : Abnormal Frequency, Pulse Width, or Period The code is logged if the fan speed is not within 300 rpm of the commanded speed.
N/A 3548-11
Aftertreatment Cooling Fan Control Module : Other Failure Mode The aftertreatment cooling fan is receiving low supply voltage or has failed internally.
N/A E1352 (3)
High Aftertreatment Cooling Fan Temperature The internal temperature of the aftertreatment cooling fan exceeded the maximum allowable temperature/threshold. The fan is NOT failed.
N/A 3548-5
Aftertreatment Cooling Fan Control Module : Current Below Normal The ECM has detected an open circuit on the aftertreatment cooling fan circuit.
N/A 3548-6
Aftertreatment Cooling Fan Control Module : Current Above Normal The ECM has detected a short circuit on the aftertreatment cooling fan circuit. Note: The E1352 (3) code indicates that the aftertreatment cooling fan internal temperature has exceeded the maximum threshold. The fan will shut down, and the machine should be shut down as soon as possible to avoid damage. The aftertreatment cooling fan is not failed.Note: The following schematic is used for Motor Grader Applications
Illustration 1 g03684589
Motor Grader Applications
Note: The following schematic is used for Articulated Truck Applications
Illustration 2 g06073472
Articulated Truck Applications
Table 2
Troubleshooting Test Steps Values Results
1. Determine the Machine
Note: The aftertreatment cooling fan is equipped only on Articulated Truck and Motor Grader applications.
Machine Application
Result: The machine is an Articulated Truck.
Proceed to Test Step 2.
Result: The machine is a Motor Grader.
Proceed to Test Step 5.
2. Inspect the Fan
A. Inspect the fan for the following conditions:
- Damaged fan blades
- Debris against the fan blades
- Air flow is obstructed
Fan
Result: The fan is OK.
Proceed to Test Step 3.
Result: The fan is obstructed.
Repair: Remove the obstruction. Verify that the problem is resolved. Return to service.
Result: The fan is damaged.
Repair: Replace the fan. Verify that the problem is resolved.
Return to service.
3. Check for Voltage at the Fan
A. Turn the keyswitch to ON.
B. Start Engine
C. Connect Cat® Electronic Technician (ET).
D. Perform an "ARD Ignition Test".
E. Measure the voltage between the Battery+ and Battery- on the Aftertreatment Cooling Fan connector.
Battery Voltage
Result: The voltage is OK.
Proceed to Test Step 4.
Result: The voltage is NOT OK.
Repair: The problem is in the wiring between