B1000

CIRCUIT DESCRIPTION
The body control module (BCM) performs a self-test when the ignition is turned on. If the BCM senses an internal error, DTC B1000 is set.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is turned on.

CONDITIONS FOR SETTING THE DTC
Any of the following conditions may set this code:
^ An internal memory error
^ An internal EEPROM checksum error
^ An internal EEPROM write error
^ An internal voltage regulation error

ACTION TAKEN WHEN THE DTC SETS
^ The SERVICE VEHICLE SOON indicator illuminates.
^ The check gauges chime sounds.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B1000 will clear when the code setting condition is no longer present.
^ A history DTC will clear if the condition is no longer present after 100 ignition cycles with no current codes active during the 100 ignition cycles.

DIAGNOSTIC AIDS
^ This DTC may be stored as a history DTC with out affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
^ If this DTC is retrieved as both a current and history DTC, replace the module.

TEST DESCRIPTION

Steps 1-4:

The number(s) below refer to the step number(s) on the diagnostic table.
2. If DTC B1000 is set as current, replace the BCM.