RE: Scanner help
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341- CMP signal noise/octane adj pin used
212- No tach input to processor- spout
216- coil 2 primary CKT fault
116- ECT or EOT snsr out of range
538- cyl bal test fail-restart
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DTC 116 - ECT out of self test range 0.3 to 3.7 volts.
Possible causes:
-- Low coolant level (ECT).
-- Ambient temperature below 10°C (50°F) (IAT).
-- Faulty harness connector.
-- Faulty sensor.
Obviously check the coolant level and for the test to be valid, the ambient temperature should be above 50*F.
The ECT(Engine Coolant Temperature) sensor is located in the coolant crossover tube. The Engine Coolant Temperature (ECT) Sensor is a thermistor whose resistance decreases as coolant temperature increases and increases as coolant temperature decreases (Negative Temperature Coefficient or NTC). The PCM measures the voltage drop across the ECT Sensor and uses this input to help calculate fuel delivery, and engine cooling fan requirements.
It has a 2 pin harness plug(C173) with LG/R(Light Green w/ Red stripe) and GY/R(Grey w/ Red stripe) wires. Disconnect and inspect the harness connection for corrosion. Worst case would require a new sensor.
DTC 212 - Loss of IDM input to EEC or SPOUT circuit grounded.
Continuous Memory DTC 212 indicates a loss of IDM input to the PCM.
Possible causes:
-- Open circuit.
-- Shorted circuit.
-- Damaged ICM.
-- Damaged PCM.
This is most likely the cause for the tach reading being intermittent as well.
DTC 216 - EEC detected coil 2 primary circuit failure
This in combination with DTC 212 indicates a fault in the Electronic Ignition System. This is a very involved circuit to diagnose but could be as simple as a faulty connection, a bad coil or a faulty Ignition Control Module.
DTC 341 - Octane Adjust shorting bar is not in or the OCT ADJ circuit is open.
Pretty self explanatory. The PCM measures the voltage drop across the Octane Adjust Plug and uses this information to modify ignition spark advance.
DTC 341 indicates OCT ADJ shorting bar is not in or the OCT ADJ circuit is open.
~ Key off.
~ Visually inspect in-line connector.
~ Is shorting bar removed?
http://www.lincolnsclub.org/forum/user_files/1846.jpg
The Octane Adjust harness is usually located under the drivers side strut tower cover. It will appear as depicted above with the harness connector containing DG(Dark Green) and GY/R(Grey w/ Red stripe) wires. Visually inspect the shorting bar is in place and the connection is free of corrosion. BTW, the ICM(Ignition Control Module) also resides under the same strut cover. Inspect that harness connection as well.
DTC 538 - Insufficient RPM change during KOER dynamic response test/ Operator error
This is a procedural error in the Engine Running Self-Test. Clear the code(s) and re-test.