Experiencing a 2017 Jeep Grand Cherokee remote start not working situation can be frustrating, especially on a hot summer morning or a freezing winter evening. This specific model year relies on a sophisticated integration between the key fob, the vehicle's computer system, and various security modules. Before diving into complex diagnostics, it is essential to understand the common culprits behind this failure, which often range from a simple battery issue to a more intricate software glitch. This guide provides a detailed analysis of why your start command is being ignored and how to resolve it effectively.
Understanding the Remote Start System Architecture
The 2017 Jeep Grand Cherokee utilizes a Passive Entry Passive Start (PEPS) system, which means the key fob communicates with the vehicle through radio frequency signals. When you press the remote start button, the vehicle's computer, known as the Electronic Vehicle Control (EVC), receives this encrypted signal. It then verifies the fob's authenticity and checks the vehicle's status, such as doors being closed and the parking brake being engaged. If these conditions are met, the EVC instructs the powertrain control module to initiate the starting sequence. A disruption at any point in this communication chain is a likely cause for the 2017 jeep grand cherokee remote start not working scenario.
Common Causes and Initial Checks
When troubleshooting, begin with the simplest explanations before assuming a major component failure. The most frequent reasons for a non-responsive system are often easy to fix. Ignoring these basic steps can lead to unnecessary visits to the dealership and higher repair costs. Always verify the physical condition and power level of the devices involved before proceeding to advanced diagnostics.
Key Fob Battery and Signal Interference
Weak or dead battery in the key fob is the single most common reason for remote start failure.
Physical obstructions or electronic interference from other devices can block the signal transmission between the fob and the vehicle.
Extreme weather conditions, such as intense cold, can temporarily reduce the fob's battery performance and signal strength.
Vehicle Security and Programming Issues
Another prevalent cause involves the vehicle's security system and module programming. If the system does not recognize the key fob as a valid and authorized device, it will not execute the remote start command. This can happen due to a programming mismatch or a security lockout triggered by repeated failed attempts to start the vehicle. Sometimes, the system requires a manual reset to re-establish the correct communication protocol between the fob and the security module.
Brake Pedal and Shift Position Verification
The 2017 Grand Cherokee has specific safety prerequisites that must be met for remote start to activate. The brake pedal must be pressed and held during the initiation sequence, and the transmission must be in the "Park" position. If the brake pedal switch is faulty or the transmission range module is not detecting the correct position, the system will assume the driver is present and ready to drive, thus negating the need for remote start. Verifying these mechanical inputs is a critical step in diagnosing the issue.
Advanced Diagnostic and Reset Procedures
If basic checks fail, performing a system reset can often resolve temporary software glitches that cause the 2017 jeep grand cherokee remote start not working correctly. This involves cycling the ignition and key fob operations in a specific sequence to force a re-establishment of the communication link. While this procedure is generally safe, it is important to follow the steps precisely to avoid confusing the vehicle's computer system further.
Performing the Key Fob Reprogramming Sequence
To reset the key fob's memory within the vehicle's system, you can perform a simple reprogramming routine. This process instructs the EVC to relearn the unique code emitted by your specific key fob. Ensure all doors are closed and the parking brake is engaged before starting this sequence to ensure a successful re-pairing of the devices.
