DTC Advanced Diagnostics: P08B9 (1.5L Engine)
DTC P08B9: Clutch Pedal Position Sensor A/B Correlation
General Description
The clutch pedal stroke sensor measures the value of the clutch stroke. When the clutch pedal is pressed, the CSS_SIG1 signal becomes higher and the CSS_SIG2 signal becomes lower. The powertrain control module (PCM) determines malfunction based on the values of CSS_SIG1 signal and CSS_SIG2 signal which are transmitted from the VSA modulator-control unit via the CAN communication. If the sum of CSS_SIG1 signal and CSS_SIG2 signal is out of normal range, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | - |
| DTC Type | One drive cycle, MIL on |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
The sum of CSS_SIG1 signal and CSS_SIG2 signal is 4.77 V or less, or 5.20 V or more at least 30 times.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Clutch pedal stroke sensor CSS_SIG1 line short to clutch pedal stroke sensor CSS_SIG2 line
- Clutch pedal stroke sensor CSS_5V line loose connection
- Clutch pedal stroke sensor CSS_GND line loose connection
- Clutch pedal stroke sensor CSS_SIG1 line loose connection
- Clutch pedal stroke sensor CSS_SIG2 line loose connection
- Clutch pedal stroke sensor failure
- VSA modulator-control unit internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.