Component Location
General Description

The TPMS is the acronym for Tire Pressure Monitoring System. This system monitors the pressure of the tire and when it drops below a certain pressure, the TPMS ECU makes the warning lamp turn on for notifying the driver. This system consists of TPMS ECU(or TPMS Receiver), Initiators and TPMS sensors. Among components of TPMS system, the TPMS sensor is installed at each wheel rim. and its role is to measure the air pressure and the temperature of the tire and then it transmits its signals to TPMS ECU. The communication from TPMS sensors is done via RF(Radio Frequency) at a frequency.

DTC Description

The TPMS ECU sets DTC B1646 if gear position signal has not been received through the CAN signal.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•

CAN Signal Check

1.

Poor connection

2.

CAN communication

Enable Conditions

•

While driving

Threshold value

•

In case that gear positin signal from TCU can not be received via CAN

Diagnostic Circuit Diagram
Signal Waveform & Data
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