Flag 52

Diagnostic Chart:

Circuit Schematic:

BATTERY VOLTAGE OUT OF RANGE
The PCM internally monitors ignition voltage on circuit 439.

INFORMATION FLAG PARAMETERS

Information flag 52 will set if:
^ Battery voltage at the PCM is greater than 17 volts.
^ Battery voltage at the PCM is less than 11 volts.

DIAGNOSTIC AIDS
When attempting to diagnose an intermittent problem, use the Scan tool[1] to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

Intermittents or opens suspected to be at the connector can be detected by using Diagnostic Service Probe. Voltage can be read on wires without disconnecting any connectors.

Check the tightness of the female terminal grip with a spare male terminal.

The engine must meet the flag setting conditions in order to diagnose the code.

NOTE: Information flags should be used for diagnostic purposes only. They do not necessarily indicate component malfunction/failure.

Information flag 52 can set if all accessories are on for extend idling periods. This does not indicate a problem.


Check the fusible link between generator and starter for corrosion or blown link. Refer to "Starting and Charging" if fusible link is blown.

[1] Select Malfunction History from Scan tool Engine Control (EC) menu.