IDM Input Circuit Malfunction/ Ignition Coil Control Circuit High Voltage
Your engine's ignition coil control signal is stuck at too high a voltage, like a light switch that's jammed in the on position. The ECU can't properly fire the spark plugs because it's losing communication with the ignition coil driver.
The ECU monitors the IgnitionDriverless Module (IDM) feedback voltage, which should toggle between low and high states as it controls spark plug firing. When the voltage remains stuck high or exceeds normal switching thresholds, the ECU detects a circuit malfunction. This indicates either a short to voltage, wiring fault, or failed coil driver component.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| IDM Output Voltage | 0.5–4.5V (cycling) | >5V sustained or stuck high |
| Coil Control Feedback | Pulsed signal 0–12V | Constant high voltage, no switching |
Code P1360 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1360 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.