Continental Automotive Technologies TIS-04-ASK Tire Pressure Monitoring System User Manual TIS04 ASK TPMS Functional description v2
Continental Automotive GmbH Tire Pressure Monitoring System TIS04 ASK TPMS Functional description v2
User Manual
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 User Manual / Functional Description 
 of the 
Continental 
 Tire Pressure Wheel Unit 
Type  
TIS-04-ASK 315MHz 

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1.  SYSTEM OVERVIEW 
Tire pressure monitoring system (called also TG for Tire Guard) is composed by: 
- a tire guard wheel unit including an integrated pressure, temperature and acceleration sensor 
and a RF transmitter. 
- a RF receiver unit (not described in this document) 
TG monitors  the  pressure of vehicle tire  when driving or  when it is stopped. An electronic unit 
(wheel unit) mounted inside the tire periodically measures the current pressure. Thanks to a RF 
link, this pressure information is transmitted to the RF receiver/decoder. 
2.  TECHNICAL DESCRIPTION 
Carrier frequency:       315MHz (± 32 kHz) 
Frequency FSK deviation:    ± 40 kHz  
Number of channels:    1 
Type of modulation:      Amplitude Shift Keying (ASK) 
Baud rate:        9600 bds 
Rated Output Power:    < 10mW 
Antenna:        Internal 
Voltage supply:      1 Lithium battery 3V (CR2050) 
Voltage supply range:    2.1 up to 3.2V 
3. TYPICAL USAGE PATTERN 
3.1 AVERAGE FACTOR CALCULATION (Standard 47 CFR Part 15C (periodic 
intentional transmitter)) 
                            RF frames maximum duration = 10.3ms 
                            Averaging factor = 20 x log (10.3/100) = -19.7dB

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4.  BLOCK DIAGRAM 
The block diagram below shows the main electronic units of the wheel unit: 
3V  
LITH IUM  
BA TT E R Y 
Learning coil
RF  CIRC U IT 
AN TEN N A
Pressure, 
tem perature,  
acceleration 
sensor and 
µcontroller 

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5.  PICTURES 

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Label 
6.1 EU 
 Continental 
TIS-04-ASK 
6.2USA 
 Continental 
TIS-04-ASK 
FCC ID: KR5TIS-04-ASK 
This device complies with Part 15 of the FCC Rules. Operation is subject to the following 
two conditions: (1) this device may not cause harmful interference, and (2) this device 
must accept any interference received, including interference that may cause undesired 
operation.  
Changes or modifications not expressly approved by the party responsible for 
compliance could void the user's authority to operate the equipment.
6.3 CANADA 
 Continental 
Model: TIS-04-ASK 
IC: 7812D-TIS04ASK 
Operation is subject to the following two conditions: (1) this device may not cause 
harmful interference, and (2) this device must accept any interference received, including 
interference that may cause undesired operation. 
Changes or modifications not expressly approved by the party responsible for 
compliance could void the user's authority to operate the equipment.