If the vehicle speed signal is abnormal under enable conditions, the ECM sets DTC P2159.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Signal check | 1. Poor connection 2. Open or short in signal circuit 3. ABS(ESC) Module |
Enable Conditions |
•
Pin voltage input level = high level
•
Turbine speed/Eng. speed ratio > 0.8
•
Brake status : Brake pedal not pressed | ||
Threshold Value |
•
Time period > 0.7 sec | ||
Diagnostic Time |
•
Continuous | ||
Case 2 | DTC Strategy |
•
Signal check | |
Enable Conditions |
•
Pin voltage input level = low level
•
Turbine speed/Eng. speed ratio > 0.8
•
Brake status : Brake pedal not pressed | ||
Threshold Value |
•
Time period > 0.7 sec | ||
Diagnostic Time |
•
Continuous | ||
Case 3 | DTC Strategy |
•
Out-of-range high | |
Enable Conditions |
•
Sensor signal no error (singnal input from CAN or HW) | ||
Threshold Value |
•
Vehicle speed > 170 mph | ||
Diagnostic Time |
•
1 sec | ||
Case 4 | DTC Strategy |
•
Out-of-range low | |
Enable Conditions |
•
Sensor signal no error (singnal input from CAN or HW) | ||
Threshold Value |
•
Vehicle speed < 0 mph | ||
Diagnostic Time |
•
1 sec | ||
Case 5 | DTC Strategy |
•
Plausibility check in overrun | |
Enable Conditions |
•
1000 rpm < Engine speed < 4520 rpm
•
Fuel system status : Fuel cut off | ||
Threshold Value |
•
Vehicle speed < 2.4 mph | ||
Diagnostic Time |
•
3 sec | ||
Case 6 | DTC Strategy |
•
Signal stuck check | |
Enable Conditions |
•
0 < Vehicle speed < 203 mph(326.69 km/h) | ||
Threshold Value |
•
Signal change per 10ms No change | ||
Diagnostic Time |
•
10 sec | ||
MIL ON Condition |
•
2 driving cycles | ||
