Code No. U0164 A/C CAN timeout



caution
  • If diagnosis code No. U0164 is set, be sure to diagnose the CAN bus line.
  • Before replacing ECU, ensure that the communication circuit is normal.

DIAGNOSTIC FUNCTION


When the signal from the heater control unit or A/C-ECU cannot be received, OSS-ECU sets the diagnosis code No.U0164.

JUDGEMENT CRITERIA


Check Conditions
  1. Power supply mode: ON
  2. ETACS-ECU system voltage is at 10 to 16 V.
Judgment Criterion
  1. CAN signal from the heater control unit or A/C-ECU cannot be received.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


1.M.U.T.-III CAN bus diagnosis
2.ETACS-ECU diagnosis code check
3.OSS-ECU diagnosis code recheck