Powertrain Controls - ECM/PCM

DTC 82 Ignition Coil 3X Signal Error:

Ignition Coil 3X Signal Wiring Diagram:

Description:

If the scan tool did not indicate a cranking RPM and there is no spark present at the plugs, the problem lies in the electronic ignition system or the power and ground supplies to the module.

The magnetic crank sensor is used to determine engine crankshaft position much the same way as the pickup coil did in distributor type systems. The sensor is mounted in the block near a seven slot wheel on the crankshaft. The rotation of the wheel creates a magnetic field in the sensor which induces a voltage signal. The electronic ignition module then processes this signal and creates the reference pulses needed by the ECM and the signal triggers the correct coil at the correct time.

Test Description: Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test will determine if the 12 volts supply and a good ground is available at the electronic ignition module.

2. Checks for resistance of the crank sensor and connections.

3. Voltage will vary in this test depending on cranking speed of engine.