Component Location
General Description
The TPMS system is the shorten word of 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. The TPMS ECU gets signals such as Tire pressure, Tire temperature, Battery status and Sensor ID via RF(Radio Frequency) at a frequency.
Component Inspection
Connect scantool to DLC(Data Link Connector) and check if there is a DTC.
If there are any DTCs except for C1664, first repair those DTCs and check DTC diagnosis.
Does a DTC C1664 happen?
![]() | ? Substitute with a known-good TPMS ECU and check for proper operation. If problem is corrected, replace TPMS ECU and then go to "Verification of Vehicle Repair" procedure. |
![]() | ? Fault is intermittently caused or was repaired and TPMS ECU memory was not cleared. Go to "Verification of Vehicle Repair" procedure. |
DTC Description
The TPMS ECU monitors the RF signals of the sensor and if no valid RF message is received from any sensor, this DTC is set.
DTC Detecting Condition
Item | Detecting Condition | Possible Cause |
DTC Strategy | Monitoring RF signlas
| Damaged TPMS ECU(RF receiver circuit) Damaged initiator(LF transmisstion circuit) TPMS sensor mode which is not fitted with the vehicle specifications |
Enable Conditions | Distance travelled during 9 minutes = 1.86 ~ 18.64 Mile (3 ~ 30 km)
There is no problem with a receiver's system voltage
|
Threshold value | No valid RF data by LF command is received from any sensor
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