P2745

Code

Generic P — Powertrain

Intermediate Shaft Speed Sensor B Circuit

Brand: Generic

Type: P — Powertrain

Views: UK: 36 EN: 42 RU: 39

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Page language: EN

Retrieve freeze-frame and live data; note when code sets (crank, idle, drive) and related codes
Visually inspect sensor connector and wiring for damage, corrosion, oil, or fluid intrusion
Wiggle-test wiring while monitoring live speed signal to reproduce the fault
Check sensor connector pins for proper fit and corrosion; clean and secure if needed
Measure reference voltage (often 5V) and sensor ground at the connector with key on
Measure sensor output with oscilloscope while cranking/driving (look for square wave or AC signal)

Hall-effect style: 0–5 V square wave, switching between ~0 V and ~5 V; frequency increases with shaft speed
Magnetic/VR style: AC voltage amplitude rises with speed; low rpm ~0.1–1.5 VAC, higher rpm several volts AC
Reference/supply: typically ~5 V (check vehicle spec) present at sensor connector with key ON
Ground: low resistance to chassis ground; sensor ground should be stable under load
Pulse frequency: proportional to shaft RPM; expected pulses per revolution depend on reluctor tooth count

Read and record codes and freeze-frame data. Note related transmission/engine codes.
Visually inspect connector and harness for damage, chafing, fluid contamination, or loose pins. Repair as needed.
Clear codes and perform test drive to see if code returns and under what conditions.
With key ON, backprobe connector: verify reference voltage and ground at the sensor connector against vehicle spec.
Measure sensor output while cranking and at idle with an oscilloscope (preferred) or multimeter; look for expected waveform/voltage.
Perform continuity and resistance checks on sensor wiring between connector and PCM/TCM; check for shorts to ground or battery voltage.
Wiggle harness and connectors while monitoring signal to identify intermittent faults from movement/vibration.
Inspect the intermediate shaft reluctor/target ring for missing teeth, damage, or excessive air gap; repair or replace if faulty.
If sensor output is absent or out of specification, replace the Intermediate Shaft Speed Sensor B and retest.
If new sensor and wiring are good but code persists, test or substitute PCM/TCM as final step according to vehicle-specific procedures and check for software updates.