Wireless Control Module (WCM)

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 Scan Tool Testing and Procedures).

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 WCM

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 Go to Step 3.
NO Repair the CAN bus lines Precautions on How to Repair the CAN Bus Line(s)).
On completion, go to Step 2.
STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines

(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.

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 power supply mode of the engine switch to OFF.

(3)Turn the power supply mode of the engine switch to ON.

(4)Check if the DTC is set.

(5)Turn the power supply mode of the engine switch to OFF.

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 ID Codes Registration Procedure). Then go to Step 4.
NO Register the ID codes (Refer to ID Codes Registration Procedure). 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 ON.

(2)Check if the DTC is set.

(3)Turn the power supply mode of the engine switch to OFF.

Q. Is DTC C1915, C1925, C1935 or C1945 set?

YES Replace the WCM and register the ID codes (Refer to ID Codes Registration Procedure).
Then start over at Step 1.
NO The procedure is complete.