55-COMMUNICATION WITH THE M.U.T.-III IS NOT POSSIBLE

INSPECTION PROCEDURE 1: Communication with the M.U.T.-IIISE is not possible.

TECHNICAL DESCRIPTION (COMMENT)

If communication with all other systems is not possible, there is a high possibility that there is a malfunction of the diagnosis line. If only the A/C system cannot communicate with the M.U.T.-IIISE, the heater controller assembly (A/C-ECU) may be defective.

TROUBLESHOOTING HINTS

Malfunction of the heater controller assembly (A/C-ECU)
Check and repair the power supply circuit system.

DIAGNOSIS

1. Using scan tool (M.U.T.-IIISE), diagnose CAN bus line.