B1557

DTC B1557 / B1561 / B1563

DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

NOTE:

Check that the following condition is satisfied when using this procedure.

- U0073, U0100, U0140 and/or U0155 are not detected

1) Start engine and operate A/C system.

DTC Troubleshooting


1. DTC check
Check DTC of ECM. DTC Check
Is there any DTC(s) detected?
YES
Go to applicable DTC diag. flow. ECM
NO
Replace HVAC control module and recheck DTC. HVAC Control Module Removal and Installation