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Mileage calibration on IC223 and IC177M clusters on the bench with CB501 and the EM019 emulator

Strumenti Interface Classic Odometer Advanced ⏱ 60-120 min 11 steps

The IC223 and IC177M clusters are made up of two separate modules: the LED display, which is only the screen, and the control module that stores the mileage value and drives the display content. The calibration has to be done on the bench, with the option of locking the synchronisation between EZS and IC module using the EM019 emulator.

Required licences

  • —

Hardware / cables

  • ZN085
  • CB501
  • EM019
  • saldatore
⚠ WarningAlways double-check the wiring diagrams before making the connections and verify the cluster revision: the wiring changes with the revision. Make sure every solder joint is solid to avoid malfunctions. If you lock the synchronisation, the EM019 emulator has to stay firmly installed inside the IC module.

Procedure

  1. Get what you need together: V850/RH850 Programmer software, soldering iron, CB501 cable, EM019 emulator (only if you need to lock the synchronisation), the wiring diagram available in the software under the programmer menu, and the capacitors to be temporarily removed and put back afterwards.
  2. Locate the control module: the position varies by model, it can be under the driver's seat, under the passenger seat, above the glovebox or above the pedal box, under the dash.
  3. Remove the instrument cluster module from the vehicle: the procedure is bench-only.
  4. Carefully desolder the capacitors.
  5. Solder the CB501 cable wires following the wiring diagram provided in the software.
  6. Verify the cluster revision to be certain the wiring is correct before carrying on.
  7. Connect the instrument cluster module to the V850/RH850 Programmer software.
  8. Go ahead and read the IC module data: once the read succeeds the software shows the current mileage value.
  9. Enter the desired mileage value in the software and click the "Write" button to apply the change.
  10. At this point the software asks whether you want to lock the synchronisation between EZS and IC module. If you do NOT need to lock it: resolder the capacitors, remove the CB501 wires and refit the IC module to the car.
  11. If you do need to lock the synchronisation: solder the EM019 emulator following the wiring diagram and the IC module revision, make sure the emulator wires are soldered properly and that it is firmly secured inside the IC module, then refit the IC module to the car.

Reference screenshots

Mileage calibration on IC223 and IC177M clusters on the bench with CB501 and the EM019 emulator — 1Mileage calibration on IC223 and IC177M clusters on the bench with CB501 and the EM019 emulator — 2
Source: Manuale Programmatore RH850/V850, cap. 8 (p.24-25) · ⏱ estimated time 60-120 min
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