Code No.4008: P/W (RR) Parameter read fail
Code No.4009: P/W (RR) Position read fail


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM



  • If the power window sub switch (rear: RH) information cannot be read, power window sub switch (rear: RH) sets the diagnosis code No. 4008.
  • If the rear-right door window glass position cannot be read, power window sub switch (rear: RH) sets the diagnosis code No. 4009.

PROBABLE CAUSES



  • Malfunction of the rear power window sub switch (rear: RH)

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.
Check that the diagnosis code is not reset.

Q. Is diagnosis code set?
Replace the rear power window sub switch (RH).
The procedure is complete.