DTC B101D
Diagnostic Instructions
DTC Descriptor
DTC B101D 00: Electronic Control Unit Hardware
DTC B101D 04: Electronic Control Unit Hardware Open
DTC B101D 08: Electronic Control Unit Hardware Performance - Signal Invalid
DTC B101D 0F: Electronic Control Unit Hardware Signal Erratic
DTC B101D 12: Electronic Control Unit Hardware Low Input
DTC B101D 13: Electronic Control Unit Hardware Low Voltage/High Temperature
DTC B101D 14: Electronic Control Unit Hardware High Voltage/Low Temperature
DTC B101D 1A: Electronic Control Unit Hardware Performance - Bias Level Out of Range
DTC B101D 2B: Electronic Control Unit Hardware Missing Reference
DTC B101D 2C: Electronic Control Unit Hardware
DTC B101D 31: Electronic Control Unit Hardware Internal Checksum Error
DTC B101D 32: Electronic Control Unit Hardware General Memory Malfunction
DTC B101D 34: Electronic Control Unit Hardware RAM Malfunction
DTC B101D 35: Electronic Control Unit Hardware ROM Malfunction
DTC B101D 36: Electronic Control Unit Hardware EEPROM Performance/Malfunction
DTC B101D 37: Electronic Control Unit Hardware Software Malfunction
DTC B101D 38: Electronic Control Unit Hardware Supervision Software Malfunction
DTC B101D 39: Electronic Control Unit Hardware Internal Malfunction
DTC B101D 3A: Electronic Control Unit Hardware Incorrect Component Installed
DTC B101D 3B: Electronic Control Unit Hardware Self-Test Malfunction
DTC B101D 3C: Electronic Control Unit Hardware Internal Communication Malfunction
DTC B101D 43: Electronic Control Unit Hardware EEPROM Incorrect Programming
DTC B101D 73: Electronic Control Unit Hardware Parity Error
DTC B101D F0: Electronic Control Unit Hardware
DTC B101D F1: Electronic Control Unit Hardware
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 control 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. |
| • | The keyless entry control module will set this DTC with symptom byte 39 when the keyless entry control module antenna is activated. |
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 when the control 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 control module. |
| • | Do not replace a control module based only on DTC B101D being set in history with the exception of the following control modules: |
| - | K36 Inflatable Restraint Sensing and Diagnostic Module (SDM) |
| - | K85 Passenger Presence Detection Module |
| • | If DTC B101D is set as current, replace the appropriate control module. |
Circuit/System Verification
Verify that DTC B101D is not set.
| ⇒ | If the DTC is set with symptom byte 43, program the control module that set the DTC. If the DTC resets, replace the control module that set the DTC. |
| ⇒ | If the DTC is set with other symptom bytes, replace the control module that set the DTC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for control module replacement, setup, and programming
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