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 Descriptors
DTC B1000 00: Engine Control Unit Performance - No Additional InformationDTC B1000 31: Engine Control Unit Performance - General Checksum Error
DTC B1000 57: Engine Control Unit Performance - Expected Reaction After Event Did Not Occur
Circuit/System Description
The control module runs a program to detect an internal fault when power up is commanded.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
The control module has detected an internal malfunction.
Action Taken When the DTC Sets
The control module refuses all additional inputs.
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears in all of the modules except the sensing and diagnostic module (SDM), when the ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
| • | If the code is set in the SDM it will never clear and the Air Bag indicator will remain illuminated. |
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 B1000 is not set.
| ⇒ | If the DTC is set, perform the setup procedure on the control module. If the DTC resets replace the control module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming
