B1541

DTC B1541

DTC Detecting Condition and Trouble Area






Circuit Diagram










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 B1541 still detected?
YES
Go to Step 2.
NO
Intermittent trouble.
2. Battery voltage supply circuit check
Disconnect "G20" connector.
Measure voltage between "WHT/RED" wire terminal of "G20" connector and ground.
Is voltage 10 - 14 V?
YES
Replace HVAC control module and recheck DTC. HVAC Control Module Removal and Installation
NO
Repair or replace defective wire harness.
"DOME" fuse blown.