RCM / CTM / Programming guide

ROOF & CONVERTIBLE-TOP MODULE

Sequences roof motors, hydraulic pumps, latches, windows and position sensors during top operation.

MODULE GUIDE32/38

01Roof-controller software update

02Replacement module setup

03Body / roof variant coding

04Position and window initialization

PROGRAMMING DECISION GATES

Identify, protect and recover the operation

Do not treat every service event as a simple flash. Determine what must be transferred, authorized, calibrated and verified before writing software.

01 / IDENTIFY

Define the operation

  • Separate a software update from replacement setup, coding, security pairing and calibration.
  • Record the current software, part number, VIN and configuration before changing anything.
02 / COMPATIBILITY

Pass the compatibility gate

  • Confirm part number, hardware level, supersession, region, options and new-versus-used restrictions.
  • Verify the OEM tool, subscription, interface and required security credentials.
03 / PRESERVE

Protect data and sequence

  • Save the pre-scan, identification, as-built data and learned values the procedure permits you to restore.
  • Follow the OEM module order, ignition states and CAN FD or DoIP transport requirements exactly.
04 / RECOVER

Respond to interruption

  • Do not cycle the ignition or disconnect power unless the OEM recovery prompt directs it.
  • Preserve the error, verify support voltage and communication, then use the approved recovery or bootloader routine.

NETWORK & PROGRAMMING ACCESS

Likely architecture paths

These are common implementations, not a vehicle-specific pinout. Confirm the exact topology, protocol and gateway route in current OEM service information before connecting or programming.

VEHICLE COMMUNICATION

Possible networks

Body CAN/CAN FD is common; LIN or dedicated Hall/switch circuits connect latches, motors, pumps and position sensors.

DIAGNOSTIC TRANSPORT

Programming access

UDS over body CAN through the gateway is typical; configuration may be shared with BCM and door modules.

PROGRAMMING TOPOLOGY

Critical online dependencies

BCM, door/window modules, trunk divider, vehicle-speed and latch inputs must remain valid throughout operation.

BEFORE CONNECTING

✓ Correct part number, hardware level and software package✓ OEM service information, application and active subscription✓ Approved interface and stable OEM-specified support supply✓ Complete pre-scan, identification and configuration saved✓ Communication, power and ground faults resolved

COMPLETE PROGRAMMING SEQUENCE

  1. Save every roof-position state, switch input and original configuration.
  2. Inspect latches, hydraulics, drains, linkage and manual-release status.
  3. Program body style, market and installed roof equipment.
  4. Initialize roof positions, latches and required window indexing in sequence.
  5. Cycle the roof under approved conditions and verify every intermediate state.

POST-PROGRAMMING VERIFICATION

  • Identification and calibration match the intended repair
  • Every required setup or calibration reports complete
  • No programming, configuration or communication DTCs return
  • System operation is confirmed under safe operating conditions
VEHICLE-SPECIFIC DATA WINS

Software, subscriptions, security access, voltage targets and ignition sequences vary by manufacturer and model.

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