FROM THEORY TO MEASURABLE EVIDENCE
System operation and failure analysis
MEASUREMENTSignals that produce evidence
- Record APP1/APP2 and TPS1/TPS2 traces with requested torque and actual throttle angle on one timeline.
- Measure motor current and supply/ground voltage drop while the throttle is moving.
- Verify adaptation/learning state separately from mechanical contamination or binding.
FAILURE CHAINSeparate similar symptoms
- Pedal correlation faults, throttle-motor faults, carbon binding and low system voltage can create the same limp-home behaviour.
VALIDATIONProve the repair is complete
- Reproduce the original fault condition.
- Check pending/permanent codes and monitor status.
- Verify no new network or low-voltage codes appear in related modules.
Overview
Accelerator-pedal position sensor is evaluated through its operating principle, supply, ground, signal, physical target and controller interpretation.
The test method must match the sensor technology. Power and ground are load-tested, while analogue, frequency or digital signals are compared with scan-tool live data.
Cleaning and installation procedures are sensor-specific; aggressive solvents, physical contact with sensing elements and unverified adjustments are avoided.
Identity and Key Facts
- Knowledge domain
- Technical foundation
- Connected category
- sensor-families
- Verification
- Source and vehicle variant are evaluated together
Technical depth link
Read this record through operating principle, energy/network relationships, measurements and failure patterns, not the part name alone.
Explore technical mysteries →