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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2006 🢒 STS 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 DTC B1000

Circuit Description

The internal fault detection is handled inside the control module. No external circuits are involved.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1000 Electronic Control Unit (ECU) Performance

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .

DTC Symptom

DTC Symptom Descriptor

00

No Additional Information

31

General Checksum Error

32

General Memory Failure

33

Special Memory Failure

34

RAM Failure

35

ROM Failure

36

EEPROM Failure

37

Watchdog Processor Failure

38

Supervision Software Failure

39

Internal Electronic Failure

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

B1000 00

Any of the conditions detailed below for B1000 31-39

B1000 31

Checksum of the EEPROM or Flash memory at power-up is incorrect.

B1000 32

Failure to write to Flash Memory during the writing process

B1000 33

Failure to write to EEPROM or Flash memory

B1000 34

RAM failure

B1000 35

    • Failure of the Calibration sector of the Flash ROM.
    • Checksum of the Flash Sector is incorrect.

B1000 36

Failure of the EEPROM. Checksum is incorrect.

B1000 37

Watchdog processor failure

B1000 38

    • BASS algorithm failure
    • Other software failures

B1000 39

    • Internal power supply failure
    • Internal yaw rate sensor failure
    • Internal temperature sensor failure
    • Forward looking sensor error

Action Taken When the DTC Sets

If any variant of the DTC B1000 was set as current, the respective module will stop working. Some indications to the driver may be displayed, function of the module that set the code.

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.

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.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Retrieve the DTCs.

Is DTC retrieved as a current DTC?

Go to Step 3

Go to Diagnostic Aids

3

Replace the module setting the DTC as current. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 4

--

4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK