Powertrain Controls - ECM/PCM

DTC 46 MIL "Service Engine Soon" Circuit Fault:

MIL "Service Engine Soon" Circuit:

CIRCUIT DESCRIPTION
There should always be a MIL "Service Engine Soon" when the ignition is "ON" and the engine stopped. The PCM will control the MIL and turn it "ON" by providing a ground path.

DTC 46 WILL SET WHEN
No ignition voltage on terminal "E5" when PCM is requesting MIL "ON."

ACTION TAKEN (PCM will default to)
No MIL.

DTC 46 WILL CLEAR WHEN
The fault condition(s) no longer exist.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks the ability of the PCM to command the MIL.
2. This test will determine if there is an open in ignition feed circuit.

DIAGNOSTIC AIDS
Check for faulty bulb or fuse. An open in CKT 419 will cause a DTC 46 to set.