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DTC C1913: Acceleration sensor abnormality 1
DTC 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
 
 
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
DTC C1913, C1923, C1933, C1943
  • The TPMS transmitter detects if the wheel is rotated by the acceleration sensor and sends the signals to KOS-ECU. When the TPMS transmitter judges that the acceleration sensor is failed, the failure signal is send to KOS-ECU, and KOS-ECU sets this code.
DTC C1914, C1924, C1934, C1944
  • The TPMS transmitter detects if the tire pressure sensor is normal and sends the signal to KOS-ECU. When the TPMS transmitter judges that the tire pressure sensor 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:
  • Low battery that is incorporated into the TPMS transmitter
  • Damaged wiring harness and connector
  • Registered IDs unmatched
  • 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.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics table ). On completion, go to Step 2.
 
STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Is the DTC C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 set?
Go to Step 3.
The procedure is complete.
 
STEP 3. Check for TPMS transmitter.
Identify the TPMS transmitter which the DTC is set by TPMS transmitter check (Refer to ).
noteThe 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.
Are there any TPMS transmitters which are identified?
Among the checked TPMS transmitters, replace the TPMS transmitters to which the DTC is set. Then register the ID codes (Refer to ). Then go to Step 4.
Even when no transmitter is checked, register the ID codes (Refer to ). Then go to Step 4.
 
STEP 4. Diagnostic trouble code recheck after register the ID codes
(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 C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 set?
Replace the KOS-ECU and register the ID codes (Refer to ). Then start over at Step 1.
The procedure is complete.