Owners of the 2017 Jeep Grand Cherokee often rely on the remote start function to precondition the cabin before a drive, making it frustrating when the system fails to respond. This issue can manifest as a key fob that does not trigger the engine, a non-responsive in-car remote interface, or a system that engages but fails to stay running. Diagnosing the problem requires a systematic approach, as the cause can range from a simple battery issue to a complex software communication error within the vehicle's integrated security and convenience system.
Understanding the Remote Start System Architecture
The 2017 Jeep Grand Cherokee utilizes a sophisticated network of modules to manage the remote start process. When the button on the key fob is pressed, it sends a radio frequency signal to the Vehicle Gateway Module, which then communicates with the Powertrain Control Module (PCM) and the Body Control Module (BCM). The BCM is responsible for verifying the security codes through the Passive Anti-Theft System (PATS) and then instructing the BCM to power the ignition circuit. A failure at any point in this communication chain, whether it is a weak key fob battery, a faulty antenna, or a software glitch, will result in the 2017 jeep grand cherokee remote start not working as intended.
Common Culprits: Key Fob and Battery Issues
The most frequently overlooked reason for a non-functioning remote start is the key fob itself. The lithium coin cell battery inside the fob has a finite lifespan, and when it depletes, the signal strength diminishes significantly, preventing the vehicle from receiving the command. Additionally, the physical buttons can become unresponsive due to dirt ingress or wear and tear on the rubber contacts. Before diving into complex diagnostics, verifying the fob's battery and testing the buttons is the essential first step in resolving the 2017 jeep grand cherokee remote start not working condition.
Battery Replacement and Resyncing
Replace the key fob battery with a new CR2032 coin cell, ensuring the polarity is correct.
After battery replacement, sit in the driver's seat and press the lock button on the door panel to re-establish communication with the vehicle.
If the remote start feature remains inoperative, the fob may need to be reprogrammed using the vehicle's ignition key sequence or through the Uconnect interface.
Vehicle Security and Anti-Theft Triggers
The security system is designed to disable convenience features like remote starting if the vehicle's computer detects a breach or a fault. A common scenario that disables the 2017 jeep grand cherokee remote start not working involves the security light. If the PATS system fails to validate the key chip, or if the vehicle was started without the proper key previously, the system enters a defensive state. Furthermore, issues with the immobilizer or a faulty theft deterrent sensor can send a false signal to the BCM, blocking the remote start command entirely.
Diagnostic Trouble Codes (DTCs)
Modern vehicles store diagnostic codes that provide insight into why a system is malfunctioning. To access the security system logs, a diagnostic scan tool is required to check for stored DTCs related to the PCM, BCM, or Uconnect module. These codes can pinpoint whether the issue is a communication error between modules, a faulty sensor, or an internal processor fault. Without retrieving these codes, troubleshooting the remote start problem is largely guesswork.
