Day 16. The car is still at the dealer.
H269 is not an update for the I-Pace but for their systems (supposedly).
Got a text saying they are now waiting for approval for a new "TCM" from JLR and then he called it a "transmission control unit".
14 days to a lemon.
Hi gimmerOC - The thread start was that you had brought the car in for the H264 software update, which basically tweaks the battery buffer and some acceleration parameters in ECO and Comfort mode to squeeze out a little extra distance in the battery. Were you experiencing any other problems? I ask because there are modules with similar acronyms that do very different things.
The TCM is a Transmission Control Module which is used to communicate whether the car is in Park, Neutral, Drive, or Reverse. Depending upon the position, it affects the cameras, sensors, ABS breaking system (electronic park), etc. This might get updated with H264, but the campaign is not clear.
The TCU is the Telematics Control Unit, which is a major communications point in the car's communication network. It's part of the High Speed Controller Area Network that interacts with 9 other modules. I would think they suspect a problem in the TCU and not the TCM. Let me paste a description from the workshop manual which explains what the Telematics system is.
Telematics is a system of devices and features which communicate with other devices or with human users. The telematics system is a combination of built-in mobile connectivity, global satellite location information and vehicle network communications. The telematics features are often branded under the name InControl™.
The system is controlled by a Telematics Control Module (TCU). The TCU is integrated into the vehicle Controller Area Network (CAN) systems. The TCU communicates with the vehicle infotainment system via the Body Control Module/Gateway Module (BCM/GWM).
The TCU is connected to the Infotainment Master Controller (IMC) via the BroadR-Reach® Ethernet.
The telematics system provides features so the driver can remotely connect to the vehicle via mobile communications network. The driver can view information from the vehicle and can send instructions to the vehicle.
Emergency call (eCall)
Breakdown call (bCall)
InControl™ remote smartphone app.
The telematics system also features an in-vehicle WiFi hotspot using access to the mobile phone network.
For the WiFi hotspot to work, the user provided micro Subscriber Identification Module (SIM) card must be inserted into the front portable media interface panel.
'Pro Services' further enhance the infotainment capabilities to deliver an even richer and more connected experience.
The internet connection is provided by the Telematics Control Module (TCU), using the customer provided micro SIM card.
Many of these 'Pro Services' are dependent on a data connection and availability is market dependent.
'Pro Services' is an optional feature in several markets as part of the 'Connect Pro' pack.
'Pro Services' supports the following enhanced system features in selected markets:
Real time traffic flow
Door to door routing
Street level imagery
Fuel price service
Either way, both modules are pretty easy to replace once they get a new one. The location of each are in easy to reach areas of the vehicle and they take very little effort to connect back into the bus. The biggest delay is waiting for the parts to be received by JLR. Good luck.