Possible Causes
NOTE: The listed causes may not be a complete list of all potential issues and there may be other causes.
- Faulty cooling fan 1
- Cooling fan 1 harness is open or shorted
- Poor electrical connection in cooling fan 1 circuit
Description
The control modules connected to the serial data circuits monitor communication during normal vehicle operation. Operating information and commands are exchanged between control modules. Each module in the serial data circuit maintains a transmission error counter and a reception error counter. The counter values increase with detected errors and decrease with error-free messages. The diagnostic trouble code (DTC) is set when the counter for cooling fan 1 status signals is incorrect.
How to Repair
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Malfunction Indicator Lamp illuminated (or Service Engine Soon warning light illuminated)