C2121

DTC C2121 TRANSMITTER ID1 NOT RECEIVED

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The tire pressure monitor valve sub-assy constantly sends radio waves to the tire pressure monitor receiver assy. If the battery for the tire pressure monitor valve sub-assy is depleted, or if the tire pressure monitor receiver assy is defective or comes off, the DTC will be output. DTCs C2121/21 to C2125/25 can only be deleted by the tester. DTCs C2181/81 to C2185/85 can be deleted when the transmitter sends a force transmission signal or the test mode ends. DTCs C2181/81 to C2185/85 are output only in the test mode.

HINT: It is necessary to perform the procedure to identify the tire pressure monitor valve sub-assy that is malfunctioning because it cannot be identified by the output DTC.

Wiring Diagram:

Step 1 - 3:

Step 4 - 5:

Step 6 - 8:

Step 9 - 11:

Step 12 - 14:

Step 15:

INSPECTION PROCEDURE

NOTE: It is necessary to register an ID code after replacing the tire pressure monitor valve sub-assy and/or the tire pressure monitor ECU.

HINT: Set the tire pressure to the specified value.