Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) ECC-412 is stored if the ECC control module detects that the control signal is incorrect.

Substitute value
The ECC control module attempts to compensate with a pre-set substitute value via a control signal to the power unit. This substitute value is lower than the maximum value. If the blower fan switch is in position 0, no control signal is transmitted.

Possible source
- Short-circuit to ground in the cable between the ECC control module connector terminal 28 and the blower fan power unit.
- Fault in the blower fan power unit.

Fault symptom[s]
- Driver fault warning. The LEDs beside the A/C and REC switches flash for approximately 20 seconds.
- The blower fan motor does not react when the blower fan switch is set to different manual positions (positions 1 to 4).