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
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 | |
2 |
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 |
Does the DTC reset? | Go to Step 2 | System OK |
