Code
P1362
GM
P — Powertrain
IC Cylinder 2 Not Toggling After Enable
AI status
Completed
Completed
100%
Causes
- Open or short in the cylinder 2 driver circuit (connector, wiring harness)
- Corroded/loose connector or poor pin contact at the injector/coil
- Failed injector or coil (stuck, shorted, or open)
- Failed PCM/ECM driver transistor for cylinder 2
- Blown fuse or faulty power/ground feeding the injector/coil circuit
- PCM software or configuration error
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Rough idle or vibration, especially at low RPM
- Loss of power or hesitation under load
- Possible misfire on cylinder 2 (may set P0302)
- Difficulty starting in severe cases
What to check
- Retrieve DTCs and freeze‑frame data with a capable scan tool; record for reference
- Use bi‑directional control to command toggle of cylinder 2 while monitoring response
- Visually inspect wiring and connector for cylinder 2 for damage, corrosion, or loose pins
- Check fuses and relays related to fuel injectors and ignition coils
- Backprobe connector and measure voltage/ground presence with key ON and during command
- Measure injector/coil resistance against manufacturer specs
Signal parameters
- At rest (not commanded) the injector/coil control pin typically at battery voltage (≈11–14 V) for low‑side drivers
- When driver is commanded ON, low‑side driver pulls pin near ground (≈0.2–1.0 V) for injectors/coil primary
- Pulse width varies with operating conditions (typically 1–15 ms for injectors; coil dwell variable)
- Injector current during pulse: roughly 0.5–3 A (varies by design); coil primary current 2–10 A depending on system
- Open circuit: infinite resistance; short to ground: near 0 Ω; typical injector resistance: species‑specific (check service data)
Diagnostic algorithm
- Capture codes and freeze frame; note battery voltage and engine conditions. Clear codes and attempt to reproduce.
- Visual inspection: open connector at cylinder 2, look for corrosion, bent pins, water intrusion, or harness damage.
- Verify power and ground: with key ON, check battery voltage at the supply pin and continuity to chassis ground.
- Backprobe control pin at connector. With scan tool, command the PCM to toggle cylinder 2 while observing voltage/current. If you see proper switching, suspect intermittent connector contact or mechanical actuator.
- Use an oscilloscope to observe driver waveform. Look for expected pull‑to‑ground pulses when commanded. Absence of pulses with correct enable indicates PCM driver or wiring open.
- Measure static resistance of injector or coil primary. Compare to spec. If out of range, replace the component.
- Swap the injector or coil with another cylinder. If the DTC or misfire follows the component, replace it. If it remains on cylinder 2, suspect wiring or PCM.
- Inspect for short to battery or ground in harness (wiggle tests while monitoring). Repair any wiring faults found.
- If wiring and component test good, consider PCM driver failure. Verify PCM grounds and power. Check for software updates or TSBs before replacing PCM. If PCM is replaced, follow programming/relearn procedures per service manual.
- After repair, clear codes and perform road test to confirm the issue is resolved and that the DTC does not return.
Likely causes
- Wiring harness damage or connector corrosion at cylinder 2
- Failed coil pack or fuel injector on cylinder 2
- PCM driver transistor failure for cylinder 2
- Missing/poor ground or supply voltage to the circuit
Fault status
Status
PCM commanded cylinder 2 driver to toggle but did not detect expected toggling response after enable; DTC P1362 stored.
Repair difficulty: Medium
Diagnostic time: 1.0-3.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email