This condition occurs when there is a short in the circuit for the 2-wire float sensor. "Engine Monitoring" must be programmed to "WARNING", "DERATE", or "SHUTDOWN", and the parameter "Coolant Level Sensor" must be programmed to "2-wire float sensor" before this diagnostic code can occur. If the parameter "Coolant Level Sensor" is programmed to "2-pin switch" or to "4-pin", this diagnostic code is disabled.
System Response:
Electronic System Response The ECM sets the Coolant Level to OK while this diagnostic code is active. Coolant Level Engine Monitoring is disabled while this code is active.
Service Tool Display or Lamps The Caterpillar Caterpillar Electronic Technician (Cat ET) will indicate "OK" and "DIAG" next to "Engine Coolant Level"on the status screen while the diagnostic code is active. The check engine lamp will illuminate.
Engine Response There is no effect on engine response due to this diagnostic code.
Test Step 1. Perform the following diagnostic procedure: Coolant Level Sensor Circuit - Test
Results:
- OK - STOP