Mon. Sep 26th, 2022

This week, homeowners of the all-new Jeep® Grand Cherokee (WL) drew some important consideration to the automaker that their automobile’s key fobs are shedding reference to the automobile. As quickly as homeowners unlock their autos utilizing a bodily key positioned inside the important thing fob, their automobile errors the motion as an tried theft and disables the SUV.

2022 Jeep® Grand Cherokee Trailhawk. (Jeep).

Whereas it is not clear what brought about the issue, Stelantis has despatched a discover to its vendor physique to “cease gross sales” of autos as a consequence of defective electronics. The doc identifies the issue as an issue with the automobile’s Radio Frequency Hub Module (RFHM), and “this might intermittently lead to a no-start situation”.

2022 Jeep® Grand Cherokee L Summit Reserve. (Jeep).

For individuals who do not know what RFHM does, it’s an built-in receiver (or base station) within the automobile that communicates with different digital modules within the automobile over a Controller Space Community (CAN) information bus or a personal serial bus. . To assist the next normal and non-obligatory automobile options or methods…

  • Brake Transmission Shift Interlock System (Just for Automated Transmission Autos) – The RFHM incorporates the controlling logic for the Brake Transmission Shift Interlock (BTSI) solenoid. The RFHM displays key standing from the Ignition Node Module (IGNM) obtained on a personal serial bus, the arduous wires brake enter, in addition to inputs obtained on the CAN information bus to carry out BTSI solenoid management capabilities.
  • ignition system – Rotary swap system or methods, relying on how the automobile is provided. For rotary methods, the IGNM coil communicates with the FOB by way of the LF sign (125KHz) with the built-in key (FOBIK), then communicates it to the RFHM by way of a personal serial bus, then the RFHM validates the legitimate key. After that may ship information bus for ignition standing. The RFHM additionally consists of management logic for the KG (KIN) backlighting options.
  • passive entry – If the good door deal with or exterior launch swap is activated, the RFHM fires and displays the LF sign from 5 Low Frequency (LF) antennas that get up and talk with the FOBIK, and Radio Frequency (RF) from the FOBIK To confirm the sign key, if a sound secret is acknowledged by the RFHM, then the RFHM sends the CAN information bus to the Physique Management Module (BCM) to lock or unlock the automobile.
  • distant keyless entry – RFHM is an RF receiver that displays RF indicators from a Distant Keyless Entry (RKE) transmitter (FOBIK) and relays the suitable electronic mail on the CAN information bus to the BCM module to assist the options of RKE capabilities.
  • distant begin system – RFHM is an RF receiver that displays RF indicators obtained by way of distant begin antenna (lengthy vary) from RKE transmitter or Passive Entry Keyless Go (PEKG) FOBIK and to assist the suitable electronic mail relay to the BCM on the CAN information bus does. All RKE capabilities together with non-obligatory distant begin operate.
  • Sentry Key Immobilizer System – RFHM makes use of a brand new high-security encryption system referred to as “Superior Encryption Normal – AES” for Sentry Key Immobilizer System (SKIS). The brand new system marries FOBIKs, RFHMs, BCMs, ELVs (in that case “and ECM) with distinctive secret keys for every automobile.
  • automobile theft alarm system – RFHM is an RF receiver that displays RF indicators obtained from an RKE transmitter or PEKG FOBIK and transmits acceptable digital messages to different digital modules within the automobile on the CAN information bus to assist the non-obligatory Car Theft Alarm (VTA) options relays. ) Administration.
2022 Jeep® Grand Cherokee (WL) key fob. (Mopar Insiders).

Stelantis says it is not going to challenge a recall for the 2022 Jeep Grand Cherokee and Grand Cherokee L due to this challenge. In an announcement to, a Stelantis spokesperson stated, “This challenge impacts a restricted variety of autos and doesn’t require a safety withdrawal. We’re reaching out to our prospects to advise that free service is offered.”

2022 Jeep® Grand Cherokee Trailhawk. (Jeep).

The notification despatched to the sellers stated, “[Stellantis] Will conduct Buyer Satisfaction Notification (CSN) to switch RFHM. There’s at the moment no therapy out there for this situation. Sellers shall be knowledgeable concerning the launch of this CSN by established communication strategies. This CSN is anticipated to be launched in March of 2022.”

Stelantis has given the Motion an motion identification variety of Z23.

2022 Jeep® Grand Cherokee L Summit Reserve. (Jeep).

The Grand Cherokee Stelantis is among the hottest autos in North America. The CSN doesn’t have an effect on the older 2022 Jeep Grand Cherokee (WK2), which continues to be on sale for the 2022 mannequin 12 months.

If you happen to personal a WL, make sure to be a part of our devoted Grand Cherokee (WL) proprietor’s discussion board ( for the newest information, data and rumors concerning the fifth era Grand Cherokee.

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