Keyless Operation System (KOS)

DTC C1915: Transmitter OFF Mode 1
DTC C1925: Transmitter OFF Mode 2
DTC C1935: Transmitter OFF Mode 3
DTC C1945: Transmitter OFF Mode 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 CAN Bus Diagnostics Chart).

DTC SET CONDITION

When the TPMS transmitter(s) is in the OFF MODE, this code is set.

TROUBLESHOOTING HINTS

The most likely causes for this DTC to set are:

- OFF mode cancellation not performed
- 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. 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 Controller Area Network (CAN)).
On completion, go to Step 2.
STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines

(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 DTC C1915, C1925, C1935 or C1945 set?

YES Go to Step 3.
NO The procedure is complete.
STEP 3. Diagnostic trouble code check

(1)Drive the vehicle for five minutes.

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

(3)Turn the ignition switch to the "ON" position.

(4)Check if the DTC is set.

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

Q. Are the all DTC C1915, C1925, C1935 and C1945 set?

YES Replace the TPMS transmitters of all the four wheels, and register ID codes (Refer to Service and Repair). Then go to Step 4.
NO Register the ID codes (Refer to Service and Repair). Then go to Step 4.
STEP 4. Diagnostic trouble code recheck after register the ID codes

(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 DTC C1915, C1925, C1935 or C1945 set?

YES Replace the KOS-ECU and register the ID codes (Refer to Service and Repair).
Then start over at Step 1.
NO The procedure is complete.