NC4 - Continuous Codes 212: Check IDM Circuit Continuity

- Key "OFF".

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Disconnect Ignition Control Module (ICM).

- Measure resistance between test pin 4 at the breakout box and at Ignition Diagnostic Monitor (IDM) circuit the ICM vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Go to NC5. NC5 - Check IDM Circuit For Shorts to Power (Excluding VREF)

No -- Service open circuit. Remove breakout box. Reconnect PCM. Clear continuous memory. Clearing Diagnostic Trouble Codes

Reconnect E-core ignition coil. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)