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DTC C1913: Acceleration sensor, Tire1
DTC C1914: Tire air pressure sensor, Tire1
DTC C1923: Acceleration sensor, Tire2
DTC C1924: Tire air pressure sensor, Tire2
DTC C1933: Acceleration sensor, Tire3
DTC C1934: Tire air pressure sensor, Tire3
DTC C1943: Acceleration sensor, Tire4
DTC C1944: Tire air pressure sensor, Tire4
 
 
cautionIf there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
 
 
DTC SET CONDITION
DTCs C1913, C1923, C1933, C1943
  • The TPMS transmitter detects if the wheel is rotated by the acceleration sensor and sends the signals to ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System>. When the TPMS transmitter judges that the acceleration sensor is failed, the failure signal is sent to ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System>, and ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System> sets this code.
DTCs C1914, C1924, C1934, C1944
  • The TPMS transmitter detects if the tire pressure sensor is normal and sends the signal to ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System>. When the TPMS transmitter judges that the tire pressure sensor is failed, the failure signal is sent to ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System>, and ETACS-ECU <Vehicles without Keyless Operation System> or KOS&OSS-ECU <Vehicles with Keyless Operation System> sets this code.
 
 
TROUBLESHOOTING HINTS
The most likely causes for this DTC to be set are:
  • The CAN bus line may be faulty.
  • Low battery that is incorporated into the TPMS transmitter.
  • Damaged wiring harness and connector.
  • The TPMS transmitter may be faulty.
  • The ETACS-ECU may be faulty. <Vehicles without Keyless Operation System>
  • The KOS&OSS-ECU may be faulty. <Vehicles with Keyless Operation System>
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus lines.
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. DTC recheck after resetting CAN bus lines.
Recheck if DTC C1913, C1914, C1923, C1924, C1933, C1934, C1943 or C1944 is set.
(1) Turn the ignition switch from the "LOCK" (OFF) to "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC C1913, C1914, C1923, C1924, C1933, C1934, C1943 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 in 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. Check whether the DTC is set again.
Recheck if the DTC is set.
(1) Turn the ignition switch from the "LOCK" (OFF) to "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC C1913, C1914, C1923, C1924, C1933, C1934, C1943 or C1944 set?
Replace the ETACS-ECU <Vehicles without Keyless Operation System> (Refer to GROUP 54A - ETACS ) or KOS&OSS-ECU <Vehicles with Keyless Operation System> (Refer to GROUP 42B - KOS&OSS-ECU ), and register the ID codes (Refer to ). Then start over at Step 1.
The procedure is complete.