2021-2022 Nissan Lane Camera Over Temperature DTCs

Nissan Technical Service Bulletin NTB22-088 addresses a condition where the Lane Camera in certain 2021-2022 Nissan models can overheat. This Nissan Lane Camera Over Temperature issue can occur if the interior cabin temperature or the temperature directly around the camera becomes excessively high. While it may not immediately indicate a persistent fault, overheating can lead to the temporary suspension of several crucial safety and driver assistance functions.

Symptoms

Owners may notice that various driver assistance systems become temporarily unavailable. These systems rely on the Lane Camera for proper operation. If the camera overheats, you might experience the suspension of the following functions:

• Vehicle-to-vehicle distance control mode (Intelligent Cruise Control - ICC)
• Conventional (fixed speed) cruise control mode
• Steering wheel assistance function
• Automatic Emergency Braking (AEB)
• Lane Departure Warning (LDW)
• Intelligent Lane Intervention (I-LI)
• Blind Spot Intervention
• Traffic Sign Recognition (TSR)

Additionally, owners might see specific warning messages displayed, such as "Unavailable: High Cabin Temperature" in the instrument cluster, or a general "Steering Assist, Lane Departure Warning (LDW), Pro-Pilot, or Traffic Sign Recognition (TSR) Unavailable message."

Fault Codes / DTCs

When the Lane Camera experiences an over-temperature condition, one or more of the following Diagnostic Trouble Codes (DTCs) may be stored in the vehicle's system, either as a "PAST" or "CURRENT" fault:

Code	Description
C2501-4B	Front camera unit
C1F05-4B	Front camera unit
C1F6B-4B	Front camera unit

Diagnosis and Trigger Conditions

The primary trigger for these symptoms and DTCs is excessive heat around the Lane Camera. This can be due to high interior cabin temperatures, especially when the vehicle has been parked in direct sunlight or in a hot environment. The system is designed to temporarily suspend functions to protect the camera from damage and will typically resume normal operation once the temperature has lowered.

Repair Procedure Summary

Nissan's repair procedure focuses on cooling the Lane Camera and confirming the resolution of the Nissan Lane Camera Over Temperature condition. The steps vary slightly depending on whether the DTC is stored as "PAST" or "CURRENT."

For "PAST" DTCs (C1F6B-4B, C2501-4B, and/or C1F05-4B):

1. The technician will erase the stored DTCs.
2. A DTC Confirmation Procedure will be performed to ensure the fault does not immediately return.
3. The owner's manual will be referenced for information regarding the "Unavailable: High Cabin Temperature" message.

For "CURRENT" DTCs (C1F6B-4B, C2501-4B, and/or C1F05-4B):

1. The ignition will be turned OFF, and the vehicle interior and the area around the camera will be allowed to cool down.
2. The ignition will then be turned ON, and the system will be re-checked for DTCs.
3. If the DTC status changes to "PAST" after cooling, the technician will erase the DTC and perform the DTC Confirmation Procedure.
4. If the DTC remains "CURRENT," further diagnostic information will be sought from the Electronic Service Manual (ESM).

DTC Confirmation Procedure:

1. Turn the ignition switch OFF.
2. Wait for at least 10 minutes to allow the Lane Camera unit to cool.
3. Start the engine.
4. Turn the Automatic Emergency Braking (AEB) system ON.
5. Check for DTCs. If the DTC(s) have cleared, the service procedure is considered complete. If any of the DTCs (C1F6B-4B, C2501-4B, and/or C1F05-4B) are still stored as "CURRENT," further diagnostic steps from the ESM are required.

Important Warnings for Owners

Nissan emphasizes that these bulletins are for qualified technicians. If you suspect this condition applies to your vehicle, it is crucial to consult your Nissan dealer for proper diagnosis. Do not assume the bulletin applies without professional verification.

Owners should be aware that Lane Camera replacement is not required for a past DTC. If the camera overheated and then returned to normal operation after cooling, replacement parts are generally not needed. Nissan's communication to customers states: "We understand you may be concerned if your vehicle displays a Steering Assist, Lane Departure Warning (LDW), Pro-Pilot, or Traffic Sign Recognition (TSR) Unavailable message. When interior cabin temperatures or temperatures around the Lane Camera are too high, these warning lights will appear to notify you a system may be unavailable. Once the interior temperature and temperature around the lane camera have lowered, normal operation will resume. In some instances the engine may need to be turned off and back on in a safe location. We have carefully inspected your vehicle for any broken, malfunctioning parts or Diagnostic Trouble Codes and have not found any concerns. Your vehicle is operating as intended."

This indicates that the temporary unavailability of these systems due to high temperatures is often a normal protective function, and the vehicle is operating as intended once the temperature returns to normal.