Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA20054 RUNNER 2WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSTIRE MONITORING SYSTEMDTC 12
2005 Toyota 4 Runner 2WD V8-4.7L (2UZ-FE)
DTC 12
2005 Toyota 4 Runner 2WD V8-4.7L (2UZ-FE)SECTION DTC 12
DTC 12 TRANSMITTER ID2 OPERATION STOP
CIRCUIT DESCRIPTION
The tire pressure monitor valve sub-assembly stops transmitting signals when receiving specific signals. The ECU stores the DTC when the tire pressure monitor valve sub-assembly receives the signals, for some reason, and stops transmitting signals. As this is not a system malfunction, the DTC is erased when signal transmission is resumed.
HINT: The electric wave is stopped at assembly plant, because the strength of the electric wave emitting from the tire pressure sensing transmitter does not comply with the Japan Wireless Telegraphy Act.
HINT: It is necessary to perform the procedure to identify the tire pressure monitor valve sub-assembly that is malfunctioning because it cannot be identified by the output DTC.
INSPECTION PROCEDURE
HINT: Set the tire pressure to the specified value.
CIRCUIT DESCRIPTION
DTC Detecting Condition:
The tire pressure monitor valve sub-assembly stops transmitting signals when receiving specific signals. The ECU stores the DTC when the tire pressure monitor valve sub-assembly receives the signals, for some reason, and stops transmitting signals. As this is not a system malfunction, the DTC is erased when signal transmission is resumed.
HINT: The electric wave is stopped at assembly plant, because the strength of the electric wave emitting from the tire pressure sensing transmitter does not comply with the Japan Wireless Telegraphy Act.
HINT: It is necessary to perform the procedure to identify the tire pressure monitor valve sub-assembly that is malfunctioning because it cannot be identified by the output DTC.
Step 1:
Step 2 - 6:
Step 7 - 8:
Step 9 - 13:
Step 14:
INSPECTION PROCEDURE
HINT: Set the tire pressure to the specified value.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.