 | |
| DTCs 4366.16 or 4366.18 Active Coolant Control Valve (CCV) in DEF Tank Header Stuck Open or Closed, High DEF Temperature.
**Paper copies of solutions may not be the most current solutions**
Complaint or Symptom :
DTC 4366.16 becomes active indicating high DEF temperature from the CCV becoming stuck open. In cold weather 4366.18 may become active indicating that DEF does not become thawed in the time required.:
Problem or Situation :
1. A small sample of machines have shown to exceed the DEF tank temperature 66°C threshold when operating in high ambient conditions with lower DEF tank levels and trigger 4366.16.
2. Coolant has frozen or become slushy in the DEF coolant line (part of the header assembly) for thawing the DEF tank
3. Debris in the coolant system, usually casting sand, gets stuck in the coolant control valve in the DEF tank header unit causing it to stick open or closed and causes the DEF temperature to increase or not to unfreeze.
Solution :
1. First check the DEF level in the tank and top it off to see if that helps eliminate the appearance of the DTC.
2. Verify the proper vehicle coolant concentration per the CTM. The unit may need to be moved to a warmer location to help thaw the lines if the coolant concentration is less than needed to achieve proper concentration. Then cycle the coolant as necessary to verify concentration meets the standards.
A. Measure DEF tank temperature and the resistance between pins 4 and 5 of the DEF header connector.. Correlate tank temperature to resistance values as shown by the table below.
0 degrees C (32 degrees F) - 942 ohms
10 degrees C (50 degrees F) - 608 ohms
25 degrees C(77 degrees F) - 330 ohms
40 degrees C (104 degrees F) - 189 ohms
50 degrees C ( 122 degrees F) - 133 ohms
If the resistance reading is far off, replace the header. If the resistance reading is close, the temperature sensor is likely not the cause of the code. Drain, Flush, and Refill the coolant system and then install the in line coolant filter, if available.
If the code continues to appear replace the DEF Tank Header assembly, perform a Drain, Flush and Refill of cooling system according to vehicle Operators Manual. All Waterloo engines are run in test cells that have coolant filters installed to help removed the debris in the block
Create a Report Only DTAC case so that an RGA can be issued for the failed part.
Additional Information :
004366.16 — DEF Tank Coolant Control Valve is Stuck Open
004366.18 — DEF Tank Coolant Control Valve is Stuck Closed | |
|
JD trouble code
