Code No. C1913: Acceleration sensor tyre1
Code No. C1914: Tyre air pressure sensor tyre1
Code No. C1916: Temperature sensor, Tyre1
Code No. C1923: Acceleration sensor tyre2
Code No. C1924: Tyre air pressure sensor tyre2
Code No. C1926: Temperature sensor, Tyre2
Code No. C1933: Acceleration sensor tyre3
Code No. C1934: Tyre air pressure sensor tyre3
Code No. C1936: Temperature sensor, Tyre3
Code No. C1943: Acceleration sensor tyre4
Code No. C1944: Tyre air pressure sensor tyre4
Code No. C1946: Temperature sensor, Tyre4
Code No. C1953: Acceleration sensor tyre5
Code No. C1954: Tyre air pressure sensor tyre5
Code No. C1956: Temperature sensor, Tyre5

caution

If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table

DIAGNOSTIC FUNCTION

Code Nos. C1913, C1923, C1933, C1943, C1953

The TPMS transmitter detects if the wheel is rotated by the acceleration sensor and sends the signals to ETACS-ECU. When the TPMS transmitter judges that the acceleration sensor is failed, the failure signal is send to ETACS-ECU, and ETACS-ECU sets these codes.

Code Nos. C1914, C1924, C1934, C1944, C1954

The TPMS transmitter detects if the tyre pressure sensor is normal and sends the signal to ETACS-ECU. When the TPMS transmitter judges that the tyre pressure sensor is failed, the failure signal is send to ETACS-ECU, and ETACS-ECU sets these codes.

Code Nos. C1916, C1926, C1936, C1946, C1956

The TPMS transmitter detects if the tyre temperature sensor is normal and sends the signal to ETACS-ECU. When the TPMS transmitter judges that the tyre temperature sensor is failed, the failure signal is send to ETACS-ECU, and ETACS-ECU sets this code.

PROBABLE CAUSES

The most likely causes for this diagnosis code to be set are:

The CAN bus may be defective
Low battery that is incorporated into the TPMS transmitter
Damaged wiring harness and connector
Malfunction of TPMS transmitter
Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis.

Use the M.U.T.-III to diagnose the CAN bus lines.

Q. 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. Diagnosis code recheck after resetting CAN bus lines.

Recheck if diagnosis code Nos. C1913, C1914, C1916, C1923, C1924, C1926, C1933, C1934, C1936, C1943, C1944, C1946, C1953, C1954 or C1956 are set.

(1)Turn the ignition switch from the "LOCK" (OFF) to "ON" position.

(2)Check if the diagnosis code is set.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Are diagnosis code Nos. C1913, C1914, C1916, C1923, C1924, C1926, C1933, C1934, C1936, C1943, C1944, C1946, C1953, C1954 or C1956 set?

	Go to Step 3.

	The procedure is complete.

STEP 3. Check for TPMS transmitter.

Identify the TPMS transmitter which the diagnosis code is set by TPMS transmitter check (Refer to

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?

	Among the checked TPMS transmitters, replace the TPMS transmitters in which the diagnosis code 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 diagnosis code is set again.

Recheck if the diagnosis code is set.

(1)Turn the ignition switch from the "LOCK" (OFF) to "ON" position.

(2)Check if the diagnosis code is set.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Are diagnosis code Nos. C1913, C1914, C1916, C1923, C1924, C1926, C1933, C1934, C1936, C1943, C1944, C1946, C1953, C1954 or C1956 set?

	Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU), and register the ID codes (Refer to ). Then start over at Step 1.

	The procedure is complete.