Code
P1359
INFINITI
P — Powertrain
CKP TDC Sensor Circuit Connector Disconnection
AI status
Completed
Completed
100%
Causes
- Disconnected or loose CKP TDC sensor connector
- Corroded or bent connector pins
- Broken, chafed or shorted wiring in the sensor harness
- Water intrusion or contamination in connector
- Faulty CKP TDC sensor
- Poor ground or reference voltage to the sensor
Symptoms
- Check Engine Light (MIL) illuminated and P1359 stored
- No-crank / no-start or extended cranking
- Intermittent stalling or engine cut-out
- Hard starting or failure to start when hot/cold
- Rough idle, misfires or reduced engine power
- Irregular RPM signal on scan tool or missing CKP data
What to check
- Read freeze frame and live data with a scan tool; confirm P1359 and related codes
- Visually inspect CKP TDC sensor connector for corrosion, damage, moisture or poor seating
- Wiggle harness and connector while monitoring CKP signal and MIL for intermittent behavior
- Backprobe connector to check for reference voltage, ground continuity and signal output
- Measure continuity between sensor connector pins and ECM/PCM connector pins
- Inspect wiring along the harness route for chafing, heat damage or rodent bite
Signal parameters
- Sensor type: typically 3‑wire Hall-effect (reference, ground, square-wave signal) or 2‑wire variable reluctance (AC sine)
- Hall-effect signal: square wave ~0–5 V, reference supply typically 5 V ± 0.5 V
- VR sensor signal: AC waveform; amplitude increases with engine speed (often ~0.2–1.5 VAC during cranking; higher at idle/run)
- Reference (supply) continuity to sensor: near 5 V with key on (engine off)
- Ground continuity:
- Sensor resistance (if applicable): manufacturer-specific; many CKP sensors fall in several hundred to a few thousand ohms — compare to spec
Diagnostic algorithm
- Retrieve and record freeze frame and related DTCs. Clear codes and attempt to re-run to verify reproducibility.
- Perform a visual inspection of the CKP TDC connector and harness for obvious disconnection, corrosion, moisture, or damage.
- With connector disconnected, inspect terminal integrity and perform contact cleaning or replacement if corroded or bent.
- Reconnect and backprobe the connector. With key on (engine off) confirm reference voltage (~5 V) and good ground. Crank engine and observe signal waveform with an oscilloscope or observe pulses on scan tool.
- If no reference or signal present, check continuity between sensor connector pins and the PCM/ECM pins. Repair any open/shorts in wiring.
- Wiggle test harness and connector while monitoring live CKP data or oscilloscope to find intermittent faults.
- If wiring and connector are good but no proper signal, measure sensor resistance (if applicable) and compare to spec; replace sensor if out of range or no output.
- After repairs, dry and seal connector if moisture was present, secure harness away from heat/moving parts, clear codes and verify drive/run conditions to confirm no recurrence.
- If all wiring and sensor checks are normal and code persists, consider ECM/PCM connector and module diagnostics or replacement as a last resort.
Likely causes
- Connector pulled apart during service or maintenance and not fully seated
- Wire damaged at flex points or near engine mounts/exhaust
- Pin corrosion from moisture or road salt
- Rodent or mechanical damage to harness
- Aftermarket repairs using incorrect connector or terminals
Fault status
Status
CKP TDC sensor circuit connector disconnected/open — PCM not receiving reliable crankshaft TDC signal. May prevent engine from starting or cause stalling/misfires.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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