Communication system for a motor vehicle (1B) comprising an electronic control unit (5B) and a plurality of electronic measurement modules (100B) each mounted in a wheel of said vehicle (1B), said plurality of electronic measurement modules (100B) comprising at least one first electronic measurement module called primary emitter 0module (100B-EP) and at least one second electronic measurement module called relay module (100B-R), said primary emitter module (100B-EP) being configured to measure parameter values associated with the wheel (10B) in which said primary emitter module (100B-EP) is mounted and to emit, to said relay module (100B-R), over a first radio communication link (L1) at a power below a first threshold, signals comprising measurement messages, the relay module (100B-R) being configured to receive signals emitted by the primary emitter module (100B-EP), to measure parameter values associated with the wheel (10B) in which said relay module (100B-R) is mounted and to emit signals comprising the measurement messages received and its own measurements to the electronic control unit (5B) over a second radio communication link (L2) at a power above a second threshold, higher than or equal to the first threshold.