ATTENTION: Diagnostics using the substitution method from a donor vehicle is PROHIBITED. Substitution of control modules does not guarantee confirmation of the fault and, in addition, may cause additional faults in the vehicle being tested and/or in the vehicle from which the modules are removed.
1. Check the customer complaint. Ask the driver as much information as possible to help diagnose the cause. Check which of the two warning types (A or B) is displayed on the tire pressure monitoring system when the ignition is switched on (from the "OFF" position to the "ON" position).
- (A) Check the tire pressure monitoring system warnings. Turning on the low tire pressure warning turns on the low tire pressure indicator light, which comes on continuously. This warning may be accompanied by a text message, such as CHECK TIRE PRESSURE (Check tire pressure) (see vehicle owner's manual). It is NOT NECESSARY to use the manufacturer's recommended diagnostic system. Diagnostic trouble codes (DTCs) are not generated with this type of warning. To disable the warning, the tire pressure must be set to the correct pressure with the ignition on. (including spare tire) as directed in your vehicle's owner's manual or as indicated on the driver/passenger door placards. You do not need to drive your vehicle to reset the tire pressure warning - the low pressure sensors transmit new information when the tire pressure changes.
- (B) System Malfunction Warnings: When a system malfunction is detected, the low tire pressure warning light will flash for approximately 75 seconds and then remain on continuously. Inspect for obvious signs of damage and system integrity. Check for low pressure sensors in all four wheels (note: the low tire pressure sensor has a metal valve stem, not a rubber one).
NOTE: Tire pressures must be set as follows:
- using a calibrated pressure gauge;
- on cold tires (the vehicle is parked for at least one hour in an open area, not in a temperature-controlled garage).
NOTE: If the tire pressure monitoring system warning does not clear within two minutes, the gauge may be out of calibration or the tires may be hot. Perform the following steps until the warning clears:
- increase tire pressure by 3 psi;
- wait two minutes;
- if the tire temperature is equal to the ambient temperature and a calibrated pressure gauge is available, adjust the tire pressure to the correct level.
NOTE: Tire pressure adjustment is a routine maintenance procedure performed by the owner. Tire pressure adjustments caused by the owner's failure to maintain the vehicle are not eligible for warranty claims.
2. Check for diagnostic trouble codes (DTCs) and refer to the DTC Index.
NOTE: If there is no communication between the tester and the TPMS module, it is recommended to perform the following steps:
The text of the article was taken from the website LRman.ru
- remove the tire pressure monitoring system power supply circuit fuse, inspect and reinstall (if it is in good condition); check if the connection has been restored;
- remove the tire pressure monitoring system ignition circuit fuse (if applicable), inspect and put back in place (if it is in good condition); check if the connection has been restored;
- with the ignition on, refer to the electrical circuit diagram and check for open circuits in the power, ignition and ground circuits of the tire pressure monitoring system module.;
- perform a CAN network integrity test using the manufacturer approved diagnostic system.
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