3 TPMS Low LineHigh Line -Receiver (1EA) -WE Sensor (4EA) -No indicator for the low pressure tire -Tire rotation : Manual teaching for Sensor ID -Receiver (1EA) -WE Sensor (4EA) -Initiator (4EA) -Indicator for the low pressure tire -Tire rotation : Auto. teaching for Sensor ID A = Sensor Tire Pressure 433MHz C = Receiver (ECU) C AAA A A = Sensor Tire Pressure 433 MHz D =125 kHz Trigger Transmitter C = Receiver (ECU) D C AAA D D D A TPMS variation
5 TPMS Operating Flow IG. ON Pressure sensor Initiator Wire connection LF signal Receiver Cluster RF signal Normal (Lamp ON for 3 sec and turns OFF) Initiator Auto Location Tire pressure data reception Tire pressure and position warning (until tire pressure added) Tire pressure transmission Judgment of tire pressure Pressure Sensor Receiver Display Abnormal value Normal value LF signal : 125 RF signal : 433 System Check Failure : Lamp ON continuously Receiver Trigger signal transmission to the pressure sensor LIN communication VSS
6 TPMS WE (Wheel Electronic) sensor CPU A B C D E Sensor ID
7 TPMS WE sensor mode NOModeDescriptionRemark 1 MS (Shipping Mode) - Sensor doesnt operate- Siemens VDO storage mode 2 MT (Test Mode) - When the sensor is supplied in EOL (End Of Line) or a spare part, it is a MT. - Sensor for A/S part 3 MP (Parking Mode) - The WE is in normal mode of operation but to save battery power only once every 13 hours a burst is transmitted. - Parking mode : VSS
8 TPMS NOModeSystemLamp StatusRemark 1Virgin ModeNot operatedTPMS W/L Blinking - Sensor ID not registered - Mode for A/S part 2Test ModeNormalTPMS W/L ON- EOL TPMS operation test 3Normal ModeNormal- - Registered sensor ID - Normal operating status * EOL : End Of Line Receiver (TPMS ECM) The TPMS receiver has three modes as described in the following table. Passenger Airbag Module
9 TPMS Initiator Pin AssignmentVehicle Tire Position PinSignal NameTypeFLFRRRRL 1B+ IGN_RUNIG PowerIG 2LIN_BUSLIN CommunicationLIN 3GNDGroundGND 4CODE1 (ADD GRD. 1) Active Low (shorted with pin 3) GND--- 5CODE2 (ADD GRD. 2) Active Low (shorted with pin 3) -GND-- 6CODE3 (ADD GRD. 3) Active Low (shorted with pin 3) --GND- Front initiatorRear initiatorConnector layout
11 TPMS PREVIOUS STATE ONPREVIOUS STATE TREAD: ON LOCATION: ON OFFTREAD: OFF LOCATION: OFF ONTREAD: ON LOCATION: ALL ON BLINKINGTREAD: OFF LOCATION: OFF DIAGNOSTIC MODE SYSTEM FAIL UNDER PRESSURE NORMAL OPERATION INITIAL CHECK (3sec. After IG ON) VIRGIN (Sensor ID is NOT registered) SYSTEM WARNING INDICATOR TREAD, LOCATION INDICATOR LAMP MODE TPMS Warning lamp operation
13 TPMS Initialization - Auto learning function WE sensor ID recognition method Using a Trigger Tool (Exciter) By the Auto Learning function FL WE Sensor ID FR WE Sensor ID RR WE Sensor ID RL WE Sensor ID Exciter RF (WE ID) LF (triggering) Receiver (ECU) FL WE Sensor ID FR WE Sensor ID RR WE Sensor ID RL WE Sensor ID RF (WE ID) Receiver (ECU)
14 TPMS Initialization - Auto location function InitiatorWE Sensor Receiver (ECU) LF signal (125kHz) RF signal (433MHz) with trigger information LIN LFI trigger signal LF signal (FL) LF signal (FR) LF signal (RL) 18 sec. 15 sec. RF signal (FL) RF signal (FR) RF signal (RL) RF signal without trigger information RF signal with trigger information
15 TPMS Exciter P : Pressure, T : Temperature, A : Acceleration ItemsShipping modeTest modeParking modeDriving mode First block mode Measure P-60s5s15s T-20s5s15s A-20s60s15s RF emission--13hrs60s15s Sensor battery voltage The battery voltage shall be measured each time a burst occurs, during RF emission. LF data5s1s30s - RS232C cable TPMS exciter GDS VCI
16 TPMS Service procedure (Recommendation) 1) TPMS receiver replaced: 2) WE sensor replaced: A/S new part (virgin mode) Register ID,… ID registered (normal mode) TPMS lamp off X 4EA A/S new part (Test mode) Register ID,… A/S new part (Park mode) 4min, VS>20kph
17 TPMS Cautions (Tire replacement) WE Sensor Step1Step2Step3 WE Sensor Step4Step5Step6 Take off the both side of tire. The tool should not be used near the valve !Place the shoe away from the sensor The lever and tire must not contact the sensor Complete extraction of the first side of tire.
18 TPMS Cautions (Tire replacement) Step7Step8 The lever and tire must not contact the sensor Step1 Tire mounting Step2Step3Step4 WE Sensor Cross point away from the sensor WE Sensor Gap maintained between the cross point and sensor Shoe can pass over the sensor without damage.
19 TPMS Mounting of the tire Step5Step6 Cross point away from the sensor WE Sensor Shoe can pass over the sensor without damage.
20 TPMS Sensor removal and mounting Step1 Sensor mounting Step2Step1 Step2 Cross point away from the sensor Step3Step4
21 TPMS Sensor inspection * Wearing parts - the seal - the seal washer - the nut - the valve core Clean the sensor. Support the rear of the valve to avoid the movement of stem. A new washer and seal must be used. Broken antenna