Own a 2015 Jeep Grand Cherokee and find the remote start not working? You are far from alone. This specific model year introduced advanced security and convenience features, but the remote start system, while generally reliable, can encounter issues stemming from the key fob, battery, or complex vehicle sensors.
Understanding the Remote Start System
The remote start function in your 2015 Grand Cherokee is designed to precondition the engine and climate settings before you enter the vehicle. This process relies on a communication handshake between the key fob, the vehicle's security module, and the engine control unit. A breakdown in this sequence is the root cause of most "not working" scenarios, and it is usually specific rather than a complete system failure.
Common Culprits: Fob and Battery
The most frequent reason for failure is a weak or depleted key fob battery. The signal required to initiate the sequence loses strength as the battery degrades, preventing the command from reaching the vehicle. Furthermore, physical damage to the fob, extreme temperature exposure, or interference from other electronic devices can also block the signal entirely.
Verify the fob battery voltage with a multimeter.
Inspect the rubber button pad for cracks or debris.
Try holding the fob closer to the driver’s door window to test for weak signal strength.
Vehicle-Specific Sensors and Security
Jeep vehicles are equipped with security systems that can disable remote start if the vehicle's "immobilizer" or anti-theft system perceives a discrepancy. If the engine control unit or the body control module requires a relearn procedure, the remote start command will be ignored. Additionally, low coolant temperature or specific door sensor faults can prevent the system from activating for safety reasons.
Diagnostic Steps for Owners
To resolve the 2015 jeep grand cherokee remote start not working issue, a systematic approach is necessary. Start with the simplest fixes, such as replacing the fob battery, and progress to checking vehicle diagnostics. Many auto parts stores offer free code reading, which can reveal stored trouble codes related to the anti-theft system or sensor malfunctions.
Check for any dashboard warning lights, specifically the security light.
Cycle the ignition key to the "ON" position three times to potentially reset the module.
Verify that the parking brake is fully engaged before attempting a start.
When to Seek Professional Help
If basic troubleshooting fails, the issue likely resides in the vehicle's wiring, the remote start module itself, or a software glitch within the Uconnect system. Certified Jeep technicians have access to factory-level diagnostic software that can perform a security system relearn or update outdated modules. Ignoring persistent issues can lead to further complexity, so professional diagnosis is recommended for intricate electrical faults.
Addressing the 2015 jeep grand cherokee remote start not working issue requires patience and a methodical check of both the fob and the vehicle's internal systems. With the right diagnosis, you can restore the convenience and comfort features that make the Grand Cherokee a premium driving experience.
