Outdoor temperature
Check the circuit components, connectors and electrical cables.Check whether there are any visible faults causing a deterioration in the operation of the charge air cooler.In order for the control unit to verify that the fault has been rectified, it must carry out a test sequence. When the control unit has carried out the entire test sequence without detecting a fault, the fault becomes inactive.The conditions under which the control unit carries out the test are: Charge air temperature above 3°C.The difference between the charge air temperature and the outdoor temperature should be less than 10°C for 10 seconds.The control unit must carry out the test in four successive cycles. This means that the power must be switched off and on with the starter key four times, at 10 second intervals.You can go into fault code monitoring and look at the fault code. There you can see whether the conditions under which the control unit verifies that the fault is rectified have been met. When the conditions have been met and the test is carried out, the fault code status is displayed during the test. If the fault code is pending, the control unit has detected a fault. If the fault has been rectified, the fault code becomes inactive. Clear the fault code.Switch the power off and on with the starter key three times in succession at 10 second intervals to extinguish the warning lamp.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The charge air temperature is noticeably higher than the outside temperature when they should be the same.
Possible causes:The temperature shown by the outside temperature sensor is too low or the temperature shown by the charge air temperature sensor is too high.There is a deterioration in the cooling capacity of the charge air cooler.