Wireless Control Module (WCM)
DTC C1913: Acceleration Sensor Abnormality 1DTC C1923: Acceleration Sensor Abnormality 2
DTC C1933: Acceleration Sensor Abnormality 3
DTC C1943: Acceleration Sensor Abnormality 4
DTC C1914: Pressure Sensor Abnormality 1
DTC C1924: Pressure Sensor Abnormality 2
DTC C1934: Pressure Sensor Abnormality 3
DTC C1944: Pressure Sensor 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 C1913, C1923, C1933, C1943
- The TPMS transmitter detects if the wheel is rotated by the acceleration sensor and sends the signals to WCM. When the TPMS transmitter judges that the acceleration sensor is failed, the failure signal is send to WCM, and WCM sets this code.
DTC C1914, C1924, C1934, C1944
- The TPMS transmitter detects if the tire pressure sensor is normal and sends the signal to WCM. When the TPMS transmitter judges that the tire pressure sensor is failed, the failure signal is send to WCM, and WCM sets this code.
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. Using scan tool MB991958, diagnose the CAN bus lines.
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 C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 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.
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 C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 set?
YES : Replace the WCM and register the ID codes. Then start over at Step 1.
NO : The procedure is complete.