DTC 46, Malfunction Indicator Light (Mil) Circuit Fault: Notes
MIL should always light when ignition is on and engine is not running for 2 seconds. PCM controls MIL by providing a ground path. DTC 46 will set when:
- Ignition voltage on MIL control circuit when PCM is requesting MIL on.
Or
- No ignition voltage on MIL control circuit when PCM is requesting MIL off.
PCM will default to no MIL.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- This step checks PCM's ability to command MIL.
- This step determines if an open is present in ignition feed circuit or MIL control circuit.