B1544

DTC B1544

DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

1) Start engine and operate A/C system.

DTC Troubleshooting


1. DTC check
Push engine switch to change ignition mode to "ON".
Push engine switch to change ignition mode to "OFF".
Push engine switch to change ignition mode to "ON" and check DTC.
Is DTC B1544 still detected?
YES
Replace HVAC control module and recheck DTC. HVAC Control Module Removal and Installation
NO
Intermittent trouble.