Wireless Control Module (WCM)
DTC C1910: Transmitter low battery voltage abnormality 1DTC C1920: Transmitter low battery voltage abnormality 2
DTC C1930: Transmitter low battery voltage abnormality 3
DTC C1940: Transmitter low battery voltage abnormality 4
DTC C1911: Reception abnormality 1
DTC C1921: Reception abnormality 2
DTC C1931: Reception abnormality 3
DTC C1941: Reception abnormality 4
CAUTION: If 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 Trouble code diagnosis). CAN Bus Diagnostics Table
DTC SET CONDITION
DTC C1910, C1920, C1930, C1940
- When the reception abnormality warning is activated because of the low battery voltage of the TPMS transmitter.
DTC C1911, C1921, C1931, C1941
- When WCM cannot receive the signals from the TPMS transmitters while driving for about 20 minutes, this code is set.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
- Low battery that is incorporated into the TPMS transmitter
- Damaged wiring harness and connector
- Registered IDs unmatched
- Malfunction of TPMS transmitter
- Malfunction of WCM
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.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus lines. On completion, go to Step 2.
STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Q: Is the DTC C1910, C1920, C1930, C1940, C1911, C1921, C1931 orC1941 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Check for TPMS transmitter.
Identify the TPMS transmitter which the DTC is set by TPMS transmitter check. ID Codes Registration Procedure
NOTE: The TPMS transmitter which cannot be checked may be faulty or the ID code may not be registered, thus do not replace it, but register the ID code. If the transmitter is faulty, it is replaced in the ID code registration process.
Q: Are there any TPMS transmitters which are identified?
YES : Among the checked TPMS transmitters, replace the TPMS transmitters to which the DTC is set. Then register the ID codes. Then go to Step 4.
NO : Even when no transmitter is checked, register the ID codes ID Codes Registration Procedure. Then go to Step 4.
STEP 4. Diagnostic trouble code recheck after register the ID codes
1. Turn the ignition switch to the "LOCK" (OFF) position.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC C1910, C1920, C1930, C1940, C1911, C1921, C1931 orC1941 set?
YES : Replace the WCM and register the ID codes. Then start over at Step 1.
NO : The procedure is complete.