Keyless Operation System
DTC C1913: Acceleration Sensor Abnormality 1DTC C1923: Acceleration Sensor Abnormality 2
DTC C1933: Acceleration Sensor Abnormality 3
DTC C1943: Acceleration 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.
TPMS DTC SET CONDITION
The TPMS transmitter detects if the wheel is rotated and sends the signals to KOS-ECU. When the TPMS transmitter judges that the portion for detecting the wheel rotation is failed, the failure signal is send to KOS-ECU, and KOS-ECU sets this code.
TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
- Damaged wiring harness and connector.
- Malfunction of TPMS transmitter.
- Malfunction of KOS-ECU.
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 : Check the registered ID by the transmitter ID Check function, and detect the wheel to which the DTC is set by the transmitter check function. Then, replace the TPMS transmitter, and register the ID Codes. Then 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.
1. Turn the ignition switch to the "ON" position.
2. Check if the DTC is set.
3. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the diagnostic trouble code C1913, C1923, C1933 or C1943 set?
YES : Start over at Step 1.
NO : The procedure is complete.
STEP 3. Recheck for diagnostic trouble code.
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 diagnostic trouble code C1913, C1923, C1933 or C1943 set?
YES : Replace the KOS-ECU and register the ID Codes. Then start over at Step 1.
NO : The procedure is complete.