P1353

Code

CHRYSLER P — Powertrain

IC Output High Pulse Detected When Grounded Cyl 3

Brand: CHRYSLER

Type: P — Powertrain

Views: UK: 30 EN: 121 RU: 37

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Page language: EN

Causes

Faulty ignition coil or coil pack (internal short or intermittent internal arcing)
Short to battery voltage (B+) on the coil primary circuit for cylinder 3
Wiring damage: chafed, pinched, or corroded harness/connector to coil or PCM
Poor or missing ground in related circuits
Faulty PCM/ignition driver (rare)
Aftermarket ignition components or improper repairs

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Misfire or rough running felt on cylinder 3
Reduced engine power, hesitation or poor idle
Possible increased fuel consumption and emissions
Intermittent no-start or hard start if failure is severe

What to check

Read freeze-frame and live data with a scan tool to confirm cylinder 3 events and related misfire codes (e.g., P0303).
Visually inspect coil, connectors and wiring for damage, corrosion, oil or moisture.
Swap the coil from cylinder 3 with another cylinder and recheck codes to see if the code follows the coil.
Measure coil primary resistance and compare with factory spec (use service manual values).
Backprobe coil connector with a DVOM or preferably an oscilloscope to observe coil driver behavior during cranking/run.
With coil connector disconnected, measure voltage at the coil supply and at the PCM driver pin to check for short to B+ or stuck-high.

Signal parameters

Coil primary supply (inactive): ~battery voltage (≈12V).
Coil driver (active): pulsed low to near 0V (ground) to energize primary; when not driven the driver should release and the coil primary sees B+ through coil.
Dwell pulse width varies with RPM and load (typically a few milliseconds at idle, shorter at high RPM).
Expected primary circuit behavior: stable pulsed ground synchronized to ignition events; no high-voltage pulses or sustained B+ on the driver pin while commanded low.
Use an oscilloscope to check waveform shape — abnormal spikes or persistent high level when driver is low indicate a fault.

Diagnostic algorithm

Retrieve and record DTCs, freeze-frame, and live data. Confirm code is current (not pending) and note operating conditions when set.
Perform visual inspection of coil pack, boots, wiring harness, and connectors for damage, corrosion, oil or moisture. Repair obvious issues.
Swap coil from cylinder 3 with another cylinder. Clear codes and run engine. If code follows the coil, replace coil.
With ignition off, disconnect the coil connector. Check for B+ at the coil supply pin and check continuity between coil supply and battery positive. Repair any short to B+ in harness.
Backprobe coil primary and PCM driver pin while cranking/running. With scope/DVOM observe that driver goes low (near 0V) when commanded and releases to B+ when off. Look for unexpected high pulses while driver is grounded.
Measure coil primary resistance and compare to spec. If out of spec, replace coil.
If wiring and coil are good, inspect connector pins and PCM harness for damage. Repair harness or connector problems as needed.
As a last step, if all wiring and coil checks OK and the driver pin behavior on the PCM is still abnormal, consult manufacturer procedures for PCM testing or replacement and check for software updates / TSBs before replacing PCM.
After repairs, clear codes and test drive to confirm fault does not return.

Likely causes

Defective coil on cylinder 3 or coil pack
Short to B+ in the coil primary feed or coil driver circuit
Damaged connector or wiring between coil and PCM
PCM/ignition driver fault (consider after wiring/coil checks)

Fault status

⚠️ Status

Ignition coil (IC) output high pulse detected while the cylinder 3 coil driver was commanded to ground — possible coil, wiring or PCM driver fault.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

Repair manuals

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P1353 — IC Output High Pulse Detected When Grounded Cyl 3