| DTC Strategy |
- Detects the lack of vehicle speed signal
|
- Poor connection
- Open or short in harness
- Wheel speed sensor (FR)
- ABS or ESC control unit
- PCM
|
| Enable Conditions |
Case 1 (Power) |
- Engine Running
- No VSS disabling malfunction present
- No TPS fault present
- No MAP fault present
- 11V < Ignition Voltage < 16V
- Engine Coolant Temperature > 60°C (140°F)
- MAP > 55 kPa
- 25% ≤ TPS ≤ 60%
- 1200 rpm ≤ Engine Speed ≤ 4000 rpm
- Vehicle Speed derived from → transmission ≥ 10 kph (6.2 mph)
|
| Case 2 (Decel) |
- Engine Running
- No VSS disabling malfunction present
- No TPS fault present
- No MAP fault present
- 11V < Ignition Voltage < 16V
- Engine Coolant Temperature > 60°C (140°F)
- MAP < 32kPa
- TPS < 1%
- 1800 rpm ≤ Engine Speed ≤ 6000 rpm
- Transmission in gear
|
| Threshold value |
Case 1 (Power) |
- VSS Fault Vehicle Speed ≤ 10 kph
|
| Case 2 (Decel) |
- Vehicle Speed < 5 kph
- Delta Engine Speed ≥ 100 rpm
|
| Diagnosis Time |
- Continuous (More than 20 seconds failure for every 30 seconds test)
|
| MIL On Condition |
|