For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B1004: Keep Alive Memory (KAM) ResetCircuit/System Description
The internal fault detection is handled inside the control module.
Conditions for Running the DTC
The control module microprocessor must be active/awake.
Conditions for Setting the DTC
The KAM in the control module has been reset. It is a normal occurrence when battery positive voltage or ground is removed from the module, such as a battery disconnect.
Action Taken When the DTC Sets
The microprocessor reverts back to the base programmed critical operating data until new data is learned and stored in KAM.
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Reference Information
Schematic Reference
Connector End View Reference
Data Communication Connector End Views
Description and Operation
Data Link Communications Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Verify that DTC B1004 is not set.
| ⇒ | If the DTC is set, perform the setup procedure on the applicable control module, if the DTC resets replace the module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming
