Code No. C1900:
Tyre ID code No. registration
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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  ).
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DIAGNOSTIC FUNCTION
When the ID codes of the TPMS transmitter is not stored in KOS&OSS-ECU, and/or
when KOS&OSS-ECU is replaced with a new one, this code is set. If the ID registration
mode is terminated forcibly or timeout after 1 or more TPMS transmitters are registered in the
ID registration mode, the ID codes in the KOS&OSS-ECU is erased, and this diagnosis code
is set.
PROBABLE CAUSES
The most likely causes for this diagnosis code to be set is:
- Damaged wiring harness and connector
- Malfunction of KOS&OSS-ECU
- ID code registration failed
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STEP 1. M.U.T.-III CAN bus diagnosis.
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Use the M.U.T.-III 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. Check whether the diagnosis code is set again.
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Recheck if the diagnosis code is set.
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(1)Turn the ignition switch from the "LOCK" (OFF) to "ON" position.
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(2)Check if the diagnosis code is set.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1900 set?
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Register the ID codes (Refer to ). Then go to Step
3.
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The procedure is complete.
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STEP 3. Check whether the diagnosis code is set again.
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Recheck if the diagnosis code is set.
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(1)Turn the ignition switch from the "LOCK" (OFF) to "ON" position.
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(2)Check if the diagnosis code is set.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1900 set?
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Replace the KOS&OSS-ECU (Refer to GROUP 42B - KOS&OSS-ECU),
and register the ID codes (Refer to ). Then start over at Step
4.
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The procedure is complete.
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STEP 4. Check whether the diagnosis code is set again.
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Recheck if the diagnosis code is set.
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(1)Turn the ignition switch from the "LOCK" (OFF) to "ON" position.
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(2)Check if the diagnosis code is set.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. C1900 set?
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Go to Step 1.
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The procedure is complete.
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