Varous TPMS functions rely on a speed signal that reprots reliably actual vehicle speed. Three speed signals(ABS1 FR wheel, EMS1 speed signal, TCS5 FR wheel) campared since one signal alone may report incorrect vehicle speed which would go undetected. Three signals must report same vehicle speed. If not, a DTC shall be set to active, and TPMS Warning indicator shall turn on.
This DTC indicates that there is a fault in speed inputs to receiver failure. It can be caused by damage to speed sensor, receiver input failure, incorrectly wired harness & shorted or open pins.
Item | Detecting Condition | Possible cause |
DTC strategy |
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Speed input signal check | 1. Faulty speed sensor 2. Shorted/open speed input |
Enable conditions |
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Continuously (IG ON) | |
Threshold value |
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CAN signal vehicle speed by EMS not received for 2s.
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CAN signal vehicle speed by EMS < 25Km/h and CAN signal wheel FR by ABS > vehicle speed +10Km/h for 4s.
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CAN signal vehicle speed by EMS < 25Km/h and CAN signal wheel FR by TCS > vehicle speed +10Km/h for 4s. |
