REDUCTANT Quality And Level Sensor
Reductant Quality and Level sensor use ultrasonic waves to determine the concentration and level. The sensor transmits an ultrasonic signal via Piezo Ceramics to a known distance from 1st reference to 2nd reference points and records the time delta to calculate the concentration. The sensor then transmits a ultrasonic signal to the top of the reductant fluid and measures the time delta for this signal and uses the concentration value to get a height of fluid. These calculations are performed within the Engine Control Module ECM.
REDUCTANT QUALITY AND LEVEL SENSOR
| DTCs | P203B - Reductant Level Sensor "A" Circuit Range/Performance P206C - Reductant Quality Sensor Low P206D - Reductant Quality Sensor High P21CD - Reductant Quality Module Supply Voltage Low |
| Monitor Execution | Continuous |
| Sensors/Actuators OK | U02A2 - Lost Communication with RDQM P2507, P2508 |
| Monitoring Duration | 15 sec |
TYPICAL REDUCTANT QUALITY SENSOR RANGE/PERFORMANCE (P203B) ENTRY CONDITIONS
| Entry Condition | Minimum | Maximum |
| P206B: | ||
| Battery Voltage | 9 V | 20 V |
TYPICAL REDUCTANT QUALITY SENSOR RANGE/PERFORMANCE MONITOR MALFUNCTION THRESHOLDS
| P203B : Concentration data from sensor = FF hex (error) OR Reductant level reading exceeds height of tank |
TYPICAL REDUCTANT QUALITY SENSOR LOW/HIGH ENTRY CONDITIONS
| Entry Condition | Minimum | Maximum |
| P206C, P206D: | ||
| Reductant quality sensor temperature | -3 deg C | |
| Ambient Air Temperature | -20 deg C | |
| Acceleration pedal position | 5% | |
| Time since engine start | 60 sec | |
| Mass Of Reductant in Tank | 3 kg | |
| Reductant Concentration signal | 5 sec | |
| Filter Reductant Concentration stabilize time | 600 sec | |
| Battery Voltage | 9 V | 20 V |
TYPICAL REDUCTANT QUALITY SENSOR MALFUNCTION THRESHOLDS
| P206C
- Filter Reductant Concentration <= 28% for > 900 sec P206D - Filter Reductant Concentration >= 60% for > 900 sec P21CD - Reductant Quality Sensor supplu voltage < 9 V, for 20 sec |