Use Of Proprietary LF Tools For Diagnosis Of TPMS Sensor Issues

An LF TPMS test and diagnostic equipment may be used to check the operation and status of the TPMS sensors. Such LF tools typically operate by generating a low-frequency (LF) magnetic field to activate the tire pressure sensors and then capturing the information transmitted by the sensor (in the form of UHF radio signals) and displaying the status of the sensor to the technician. Any LF tool capable of supporting the communication protocols of the Continental TG1C sensor may be used.

If TPMS faults are set with DTC  s indicating either "No Signal" (DTC  codes ending in 31 - for example, C1A56/C1A58/C1A60/C1A62-31  ) or "No Operation" (DTC  codes ending in 93 - for example, C1A56/C1A58/C1A60/C1A62-93  ) from one or more TPMS sensor/transmitter assemblies and if an LF Tool is available, the following procedures may be used to diagnose the specific nature of the fault:

Incorrect TPMS Sensors Fitted 

First, complete a visual external inspection to make sure wheel unit sensors are fitted. (for example no Winter wheels, space saver, Rubber valves etc) and ask the customer if they have fitted the spare wheel unit before the fault occurred. If no wheel units/incorrect wheel units/rubber valves are fitted:

1. Fit the correct JLR wheel units. Part Numbers for correct wheel unit is GX63 - 1A159 - AA
2. Use the Tire Pressure Sensor Replacement routine available in Pathfinder to write the new wheel unit ID(s) to the tire pressure monitoring system control module. Then, test drive the vehicle for at least 15 minutes duration with speed of 32 km/h (20 mph) and retest for TPMS DTC  s

Correct TPMS Sensors Fitted 

If the correct TPMS sensor/transmitter assemblies are fitted and if an LF Tool is available, the following procedures may be used to diagnose the specific nature of the fault:

1. Use the LF Tool to check the STATUS of all the wheel units. If any of the wheel units are in SHIP (DISABLED Mode), use the LF Tool to activate the units to ON (ENABLED/PARK Mode). Then, test drive the vehicle for at least 15 minutes duration with speed of 32 km/h (20 mph) and retest for TPMS DTC  s
2. If there is no response from one or more of the wheel units, first check the following:

• Check that only approved JLR parts are fitted
• Check that the frequency of the wheel units is 433MHz
• Review potential electrical interference to the tire pressure monitoring system control module for example charging units, power adapters, laptop/Nav screens, etc
• Check to see if after-market Front and/or Rear facing cameras have been fitted. If fitted, reposition them

1. Following the above checks and any remedial action, if faults still persist:

• Run the Tire Pressure Monitoring Tire Pressure Sensor Test available in Pathfinder and identify faulty wheel unit/s
• Replace the faulty wheel units with the correct JLR wheel units. Part Numbers for correct wheel unit is GX63 - 1A159 - AA
• Use the Tire Pressure Sensor Replacement routine available in Pathfinder to write the new wheel unit ID(s) to the tire pressure monitoring system control module. Then, test drive the vehicle for at least 15 minutes duration with speed of 32 km/h (20 mph) and retest for TPMS DTC  s