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DTC C1915: Transmitter OFF mode tire1
DTC C1925: Transmitter OFF mode tire2
DTC C1935: Transmitter OFF mode tire3
DTC C1945: Transmitter OFF mode tire4
 
 
cautionIf there is any problem in the CAN bus lines, an incorrect DTC may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table .).
 
 
DTC SET CONDITION
When the TPMS transmitter(s) is in the OFF MODE, this code is stored.
 
 
TROUBLESHOOTING HINTS
The most likely causes for this DTC to be stored are:
  • OFF mode cancellation not performed
  • Damaged wiring harness and connector
  • Malfunction of TPMS transmitter
  • Malfunction of ETACS-ECU <Vehicles without Keyless Operation System>
  • Malfunction of KOS-ECU <Vehicles with Keyless Operation System>
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, 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 C1915, C1925, C1935 or C1945 is stored.
(1) Turn the ignition switch (engine starting switch) from the "LOCK" (OFF) to "ON" position.
(2) Check if the DTC is stored.
(3) Turn the ignition switch (engine starting switch) to the "LOCK" (OFF) position.
Is DTC C1915, C1925, C1935 or C1945 stored?
Go to Step 3.
The procedure is complete.
 
STEP 3. Check whether the DTCs are stored again.
Recheck if the DTCs are stored.
(1) Drive the vehicle for five minutes.
(2) Turn the ignition switch (engine starting switch) from the "LOCK" (OFF) to "ON" position.
(3) Check if the DTC is stored.
(4) Turn the ignition switch (engine starting switch) to the "LOCK" (OFF) position.
Are the all DTCs C1915, C1925, C1935 and C1945 stored?
Replace the TPMS transmitter (Refer to <Vehicles with steel type wheels> or <Vehicles with aluminum type wheels>.), of all the four wheels, and register ID codes (Refer to .). Then go to Step 4.
Register the ID codes (Refer to .). Then go to Step 4.
 
STEP 4. Check whether the DTC is reset.
Recheck if the DTC is stored.
(1) Turn the ignition switch (engine starting switch) from the "LOCK" (OFF) to "ON" position.
(2) Check if the DTC is stored.
(3) Turn the ignition switch (engine starting switch) to the "LOCK" (OFF) position.
Is DTC C1915, C1925, C1935 or C1945 stored?
Replace the ETACS-ECU <Vehicles without Keyless Operation System> (Refer to .) or KOS-ECU <Vehicles with Keyless Operation System> (Refer to GROUP 42B, KOS-ECU .), and register the ID codes (Refer to .). Then start over at Step 1.
The procedure is complete.