C7.1 Engines and Generator Sets Caterpillar

Cooling Fan - Calibrate

Usage:

C7.1 770

Use this procedure if the following diagnostic code is active:

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Table 1
Diagnostic Trouble Codes
J1939 Code	CDL Code	Code Description	Comments
4212-13	1551-13	Engine Demand Fan System : Out of Calibration	The fan speed is not calibrated to the fan control solenoid. The code is logged.

The Electronic Control Module (ECM) supplies current to the engine fan control solenoid. The engine fan control solenoid controls the pressure to the fan pump by allowing oil to bypass the fan pump. The fan pump drives the fan. For accuracy, the ECM must determine the relationship between the current to the engine fan control solenoid and the actual fan speed. The electronic service tool is used to calibrate the current to a known fan speed.

Note: The ECM will use a nominal current to drive the engine fan control solenoid on the initial calibration. The ECM uses the last calibrated value as the starting point on subsequent calibrations.

Connect the electronic service tool to the diagnostic connector.
Select the "Service" tab and select "Calibrations". Start the "Fan Calibration".
Meet the required conditions to proceed with the calibration. Follow the directions that are provided on the electronic service tool.
Measure actual fan speed with the following service tools and Software License, NETG5044:
- 348-5430 Multi-Tool Gp
- 308-7264 Multitach Tool Gp
1. If actual fan speed matches the fan speed on the electronic service tool, press the "Next" button.
2. If the actual fan speed does not match the fan speed on the electronic service tool, adjust the current to change fan speed.
When actual fan speed matches the fan speed on the electronic service tool, the calibration is complete. Follow the directions that are provided on the electronic service tool.