A Toyota pre-collision system malfunction after windshield work usually arrives as one specific message, and each message points at a different part of the vehicle. Some point at the glass in front of the camera. Others point at the radar sensor up front, a setting that was switched off, or the battery. The exact words on the multi-information display tell you which check comes first.
Two Toyota books print these messages with their fixes: the 2024 Tacoma owner's manual and the 2025 RAV4 Hybrid driving support excerpt. Each one applies to its own model and year. Your vehicle has its own manual, and its wording can differ, so match the words on your screen to your own book. When the message turns out to be about camera aim, that work is on the Toyota ADAS calibration page.
Toyota Pre-Collision System Malfunction After Windshield Work Comes in Several Forms
The warning lamp and the display text work as a pair. In the Tacoma manual's warning-light table, a PCS warning light that flashes or stays lit "Indicates a malfunction in the PCS (Pre-Collision System)" and sends the driver to the display. The action printed beside it is to follow the instructions on the multi-information display. The lamp starts the search, and the text narrows it.
The warning-light table gives the lamp a second meaning. If the PCS or the VSC (Vehicle Stability Control) system is disabled, the PCS warning light will illuminate. A lit lamp can therefore mean a system is switched off with no broken part anywhere. The lamp by itself proves nothing about the camera, and nothing about the glass job.
One message stands apart. "System Malfunction Visit Your Dealer" means one of a listed group of systems is disabled. The truck's list includes PCS, Lane Departure Alert, Lane Tracing Assist, Automatic High Beam and dynamic radar cruise control, some of them only if equipped. Its instruction is a dealer inspection right away, covered further down.
Driving with a message on the screen means driving without the aid it names. The truck still steers and brakes under your control. The automatic warning or braking that the message names may not step in while it shows. Leave extra room ahead until the PCS message clears or the cause is found.
Each message below has its own first fix in the manual that prints it.
| Message on the display | Manual | First fix in that manual | Windshield in the fix |
|---|---|---|---|
| PCS warning light, flashing or lit | 2024 Tacoma | Follow the instructions on the multi-information display | Depends on the message shown |
| System Malfunction Visit Your Dealer | 2024 Tacoma | Have a Toyota dealer inspect the vehicle immediately | Not named for this message |
| System Stopped Front Camera Low Visibility See Owner's Manual | 2024 Tacoma | Wipers, defog with the air conditioning, close the hood, remove stickers | Yes: the glass in front of the front camera |
| System Stopped Front Radar Sensor Blocked | 2024 Tacoma | Clean the radar sensor and its cover; drive near structures or vehicles | Not named in the fix |
| System Stopped Front Radar In Self Calibration | 2024 Tacoma | Clean the sensor and cover; keep driving for a while | Not named in the fix |
| Pre-Collision System Radar In Self Calibration Unavailable See Owner's Manual | 2025 RAV4 Hybrid | Remove any material attached to the radar sensor and its cover | Not named in the fix |
| System Stopped See Owner's Manual | 2024 Tacoma | Check the battery voltage | Not named in the first step |
| Traction Control Turned OFF, with the PCS light on | 2024 Tacoma | Press the button again to turn the system back on | Not named for this message |
Camera Messages: Dirt, Stickers and a Hood Left Open
Of the front camera warnings a driver may see after a new windshield, "System Stopped Front Camera Low Visibility See Owner's Manual" is the one whose fixes involve the glass. The front camera looks out through the glass, and anything that dims its patch of glass can stop it. The Tacoma manual lists a short set of correction methods for this message:
- Run the windshield wipers to remove dirt or foreign matter from the glass.
- Defog the windshield with the air conditioning system.
- Close the hood, and remove any stickers or other items blocking the view in front of the front camera.
Try each step before anyone suspects the front camera. All three deal with what sits between the lens and the road.
Stickers deserve a second look after a replacement. Parking permits and toll tags can go back onto new glass, and a tag placed near the camera can block part of its view. Move any tag well clear of the front camera. The Toyota windshield replacement page covers the glass side of the job.
The hood item is easy to miss. A raised hood stands up in front of the windshield and sits in the camera's line of sight. The 2025 RAV4 Hybrid excerpt carries the same hood-and-sticker fix in its own words, so two different models treat it as a first check.
A water-repellent treatment does not retire the wipers. With a glass coating agent applied, the 2025 hybrid still needs its wipers to clear water droplets from the area in front of the front camera. An oily film, water droplets or dirt on the glass call for cleaning in that excerpt too.
Some camera messages concern the back of the vehicle. One Tacoma message lists Rear Camera Detection and Parking Support Brake, where equipped, and asks the driver to remove dirt or foreign matter from the rear camera. Those rear camera messages have nothing to do with the windshield.
Camera aim is a separate question from a dirty view. Aim is set by a procedure, and the post on how Toyota's bulletin sets up the camera target walks through what that involves on one model.
