Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Diagnostic trouble code (DTC) ECC-421 is stored if the ECC control module registers that there is no voltage.

Possible source
- Fault in blower fan relay.
- Open-circuit in the cable between ECC control module terminal 29 and blower fan relay (beside blower fan motor).
- Fault in the blower fan motor.

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 in position 5.