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DTC C1900: No Registration
 
 
cautionIf there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, Trouble code diagnosis ).
 
 
DTC SET CONDITION
When the ID registration information of the TPMS transmitter is not stored in the WCM, and/or when the WCM is replaced with a new one, this code is set. If the ID registration mode is terminated forcibly or time-out after one or more TPMS transmitters are registered in the ID registration mode, the ID information in the WCM is erased, and this diagnostic trouble code is set.
 
 
 
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
  • Damaged wiring harness and connector
  • Malfunction of TPMS transmitter
  • Malfunction of WCM
  • ID code registration failed.
 
 
 
 
DIAGNOSIS
Required Special Tools:
  • MB991958 Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicle Communication Interface (V.C.I.)
    • MB991827 M.U.T.-III USB Cable
    • MB991910 M.U.T.-III Main Harness A
STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics table ). On completion, go to Step 2.
 
STEP 2. Diagnostic trouble code check
(1) Turn the power supply mode of the engine switch to OFF.
(2) Turn the power supply mode of the engine switch to ON.
(3) Check if the DTC is set.
(4) Turn the power supply mode of the engine switch to OFF.
Is the DTC C1900 set?
Register the ID codes (Refer to ). Then go to Step 3.
The procedure is complete.
 
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Turn the power supply mode of the engine switch to OFF.
(2) Turn the power supply mode of the engine switch to ON.
(3) Check if the DTC is set.
(4) Turn the power supply mode of the engine switch to OFF.
Is the DTC C1900 reset?
Replace the WCM and register the ID codes (Refer to ). Then start over at Step 1.
The procedure is complete.