What this code means
B1145 can indicate that the power window master switch recognizes a front passenger's window position different from its actual position.
B1145 concerns a disagreement between the front passenger window position recognized by the power window master switch and the window's actual position. The diagnostic subject is the position information used by the system. The procedure connects that subject to switch work, manual window operation and the specified HDS function.
Keep the actual window movement and the system's recognized position distinct as you follow the checks. The code description concerns their relationship. The actions below are the documented way of working through that relationship for this vehicle.
What the vehicle may do
- The recognized window position may differ from its actual position.
Possible fault areas
- The front passenger's window position detect circuit may be involved.
- The front passenger's power window switch may be involved.
Read the preliminary work item before carrying out the manual opening and closing sequence. The sequence uses the front passenger's own power window switch. This keeps the control used for the operation matched to the window under investigation.
The HDS function is part of the same diagnostic path. Associate its information with the window operation that was performed. A physical operation and a scan-tool observation describe different parts of the check and are most useful when their order is retained.
Diagnostic path
Understand the stored condition
B1145 means Front passenger's window position detect circuit malfunction. The power window master switch recognizes the front passenger's window position. It stores B1145 if the position it recognizes differs from the window's actual position.
What comes before the window check
If you are troubleshooting multiple DTCs, follow B-CAN System Diagnosis Test Mode A first. In the Power Window [Multiplex Control Unit, Door] system, B1130 and B1131 take priority over B1145. If either code is present, troubleshoot that code before continuing with B1145.
The switch work item
The identified work item for the Front Passenger's Power Window Switch is Resetting the Front Passenger's Power Window Switch.
Operate the passenger window manually
Turn the vehicle to the ON mode. Use the front passenger's power window switch to manually open the front passenger's power window. Then use the same switch to manually close it.
The opening and closing actions make the instruction concrete: operate the passenger window with the passenger switch, following the stated sequence. Keep the direction of movement and the switch being used clear in the record. This avoids combining an action at one control with a conclusion that belongs to a different window or control.
HDS function
The HDS function for this check is Body Electrical ＞ Power Windows ＞ Data List.
Takeaway
B1145 is about a difference between the recognized and actual front passenger's window position. The preliminary code checks come before the manual window operation.
Final check
B1145 can point to a mismatch between the recognized and actual front passenger's window position.
The useful outcome is a clear account of the switch work, the passenger-window operation and the HDS function used in this procedure. Keep those findings tied to B1145 and this vehicle's front passenger window-position issue.
