DTC B1000
Diagnostic Instructions
DTC Descriptors
DTC B1000 00: Electronic Control Unit
DTC B1000 08: Electronic Control Unit Performance - Signal Invalid
DTC B1000 0F: Electronic Control Unit Signal Erratic
DTC B1000 12: Electronic Control Unit Low Input
DTC B1000 2B: Electronic Control Unit Missing Reference
DTC B1000 34: Electronic Control Unit RAM Malfunction
DTC B1000 35: Electronic Control Unit ROM Malfunction
DTC B1000 36: Electronic Control Unit EEPROM Performance/Malfunction
DTC B1000 37: Electronic Control Unit Software Malfunction
DTC B1000 38: Electronic Control Unit Supervision Software Malfunction
DTC B1000 39: Electronic Control Unit Internal Malfunction
DTC B1000 43: Electronic Control Unit EEPROM Incorrect Programming
DTC B1000 46: Electronic Control Unit Configuration Not Programmed
DTC B1000 4A: Electronic Control Unit Programming Checksum Error
DTC B1000 56: Electronic Control Unit Too Many Transitions
DTC B1000 73: Electronic Control Unit Parity Error
DTC B1000 F0: Electronic Control Unit
DTC B1000 F1: Electronic Control Unit
DTC B1000 F2: Electronic Control Unit
DTC B1000 F3: Electronic Control Unit
Circuit/System Description
The internal fault detection is handled inside the control module. The symptom byte listed in the DTC Descriptor is for engineering reference only. No external circuit diagnosis is involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The module has detected an internal malfunction.
Action Taken When the DTC Sets
The 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 when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction. |
Diagnostic Aids
| • | This DTC may be stored as a history DTC without 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 that set the DTC. |
Circuit/System Verification
If this DTC is retrieved as a current DTC, replace the module that set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for module replacement, setup, and programming
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| © Copyright Chevrolet. All rights reserved |
