The 4WD vehicle measures the G-sensor signal to solve for 4WD vehicle unique problems. For example all 4 wheels are locked early on a low-friction road or control response is delayed when road friction coefficients vary. The HECU uses a filtered signal, as a supplementary value, to determine the road friction coefficient. This value is used for the accurate calculations of assumed vehicle speed, or precise division of control starting points.
The HECU monitors the G-sensor voltage continuosly,and sets this code if the G-sensor value is either higher than 0.5G for more than 20 seconds when vehicle speed is above 10 Km/h and brake switch is OFF, or if G-sensor value is lower than 0.1G for more than 60 seconds when wheel sensor minimum value is above 0.2G.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Signal monitoring | ● Improper installation of G-Sensor ● Abnormal Rotor and wheel bearing ● Faulty G-Sensor |
Detect Mode | ● Outside the ABS control cycle ● Diagnosis mode ● Failure mode | |
Enable Conditions | ● When vehicle speed is >10km/h and the brake light switch is off, |G|>0.5G for 20sec continuously. ● When |min wheel speed| / dt ≥0.2G and |G| ≤0.1G for 60sec continuously. | |
Fail Safe | ● ABS/TCS/ESP functions are inhibited, EBD function is allowed and the ABS/TCS/ESP warning lamps are activated. |
