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DTC C1915: Transmitter
OFF Mode 1
DTC C1925: Transmitter OFF Mode 2
DTC C1935: Transmitter OFF Mode
3
DTC C1945: Transmitter OFF Mode 4
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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 (Refer to GROUP 54C, Trouble code diagnosis  ).
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When the TPMS transmitter(s) is in the OFF MODE, this code is set.
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The most likely causes for this DTC to set are:
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- OFF mode cancellation not performed
- Damaged wiring harness and connector
- Malfunction of TPMS transmitter
- Malfunction of KOS-ECU
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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
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STEP 1. M.U.T.-III CAN bus diagnostics
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Use scan tool to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair the CAN bus lines (Refer to GROUP 54C -
CAN Bus Diagnostics table ).
On completion, go to Step 2.
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STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
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(1)Turn the ignition switch to the "LOCK" (OFF) position.
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(2)Turn the ignition switch to the "ON" position.
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(3)Check if the DTC is set.
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(4)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is DTC C1915, C1925, C1935 or C1945 set?
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Go to Step 3.
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The procedure is complete.
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STEP 3. Diagnostic trouble code check
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(1)Drive the vehicle for five minutes.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Turn the ignition switch to the "ON" position.
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(4)Check if the DTC is set.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Are the all DTC C1915, C1925, C1935 and C1945 set?
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Replace the TPMS transmitters of all the four wheels, and register ID codes (Refer
to ). Then go to Step 4.
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Register the ID codes (Refer to ). Then go to Step
4.
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STEP 4. Diagnostic trouble code recheck after register the ID codes
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(1)Turn the ignition switch to the "ON" position.
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(2)Check if the DTC is set.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is DTC C1915, C1925, C1935 or C1945 set?
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Replace the KOS-ECU and register the ID codes (Refer to ).
Then start over at Step 1.
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The procedure is complete.
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