DTC 57

DTC 57 PCM 5 Volt Shorted:

PCM 5 Volt Shorted:

CIRCUIT DESCRIPTION
The 5 volt reference is a non-varying calculated voltage.

DIAGNOSTIC TROUBLE CODE (DTC) 57 WILL SET WHEN
5 volt reference is less than 1 volt.

ACTION TAKEN (PCM will default to)
Backup fuel, no EGR and no turbo boost.

DTC 57 WILL CLEAR WHEN
The fault condition(s) no longer exist, and the ignition switch is cycled "OFF" then "ON."

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks to confirm that a DTC is still present.
2. Checks to determine if there is a 5 volt reference from the Powertrain Control Module (PCM).
3. Checks to determine if there is a short-to-ground in CKT 416 or CKT 474, or a short-to-ground in the PCM.

DIAGNOSTIC AIDS
During the time the failure is present, the setting of additional DTCs that share a 5 volt reference may also set.