Land Rover Anti Lock Control Traction Control Rover Manual
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Input/OutputDescriptionPin No. InputGround12 -Not used13 to 15 Input12V Permanent battery supply16 Connector C2447 Input/OutputDescriptionPin No. -Not used1 to 4 OutputRear LH initiator - Signal positive (+)5 OutputRear LH initiator - Signal negative (-)6 OutputRear RH initiator - Signal positive (+)7 OutputRear RH initiator - Signal negative (-)8 -Not used9 to 12 OutputFront LH initiator - Signal positive (+)13 OutputFront LH initiator - Signal negative (-)14 OutputFront RH initiator - Signal positive (+)15 OutputFront RH initiator - Signal negative (-)16 Controller Area Network (CAN) Signals The TPMS module sends and receives a number of digital messages via the medium speed CAN. The received messages are used for the operation of the TPMS. The transmitted messages comprise of TPMS status and requests to the instrument cluster to illuminate warnings indicators and/or display messages in the message center. Received Messages The TPMS module receives the messages shown in the following table. Transmitted ByMessage ABS moduleVehicle speed ATC moduleExternal ambient temperature - corrected CJBSide lamp status CJBIgnition switch status Instrument clusterOdometer value Instrument clusterMinute counter Instrument clusterVehicle voltage level ECMEngine crank relay status T4Diagnostic physical request Wheels and TiresLesson 2 – Chassis 47Technical Training (G421048)
Transmitted ByMessage T4Diagnostic functional request ECMEngine running status Instrument clusterMaster car configuration identification Instrument clusterCar configuration para- meters Transmitted Messages The TPMS module transmits the messages shown in the following table. Received ByMessage T4TPMS diagnostic response Instrument clusterTPMS Red warning indicator request at 35% tire deflation Instrument clusterTPMS yellow warning indicator request at 25% tire deflation Instrument clusterTPMS audible alert Instrument clusterTPMS message display request Diagnostics The TPMS module has a diagnostic connection via the medium speed CAN to enable system status and faults to be retrieved using T4. Additionally, an on-board diagnostic routine within the TPMS module constantly monitors the system and alerts the driver to a system faults by illuminating the amber or red warning indicators, emitting a tone from the instrument cluster sounder and/or displaying a message in the instrument cluster message center. Fault Detection If a sensor fails, the amber warning indicator in the instrument cluster will be illuminated. On vehicles with a high line instrument cluster, a message Tire Pressure Monitoring Sensor Fault will be displayed in the message center in addition to the amber warning indicator. If more than one sensor fails or the TPMS module develops a fault, the amber warning indicator will be illuminated. On vehicles with a high line instrument cluster, a message Tire Pressure Monitoring System Fault will be displayed in the message center in addition to the amber warning indicator. This fault could also be caused if RF interference near the vehicle affects the system signal reception. When the interference has ceased, the fault will be automatically cancelled and the TPMS will operate normally. If a tire pressure sensor battery voltage becomes low, the sensor transmits a message to the TPMS module. The module stores the low battery condition as a fault flag in its memory with no other visual warnings displayed. If the battery fails, the sensor will stop transmitting and the TPMS module will display a Front left tyre not being monitored message, for example in the message center on high line instrument clusters or the red warning indicator will be illuminated on low line instrument clusters. The dealer should interrogate the TPMS module using T4 for the fault flag to determine the cause of the message. If the battery has failed the sensor must be replaced and the stored fault flags removed using T4. The TPMS module will learn the identification of the new sensor when the vehicle is driven. If the replaced sensor is fitted to the spare wheel (if fitted), its identification must be manually programmed into the module using T4. (G421048) Technical Training48 Lesson 2 – ChassisWheels and Tires
CONTROL DIAGRAMNOTE: A = Hardwired; F = RF Transmission; N = Medium Speed CAN Bus Fusible link 17E (50A)1Ignition switch2 Wheels and TiresLesson 2 – Chassis 49Technical Training (G421048)
Fuse 36P (5A)3 Fusible link 11E (30A)4 Fuse 32P (10A)5 TPMS module6 TPMS switch and LED7 Instrument cluster8 Tire pressure sensor - spare (if fitted)9 Initiator - Rear right hand10 Initiator - Rear left hand11 Initiator - Front right hand12 Initiator - Front left hand13 Tire pressure sensor - Rear right hand14 Tire pressure sensor - Rear left hand15 Tire pressure sensor - Front right hand16 Tire pressure sensor - Front left hand17 (G421048) Technical Training50 Lesson 2 – ChassisWheels and Tires