Chevrolet Trax: DTC B101D (with side blind zone alert, uft): electronic control unit hardware

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 Descriptor

DTC B101D

Electronic Control Unit Hardware

For symptom byte information, refer to Symptom Byte List .

Circuit/System Description

The side detection system uses two modules B218L Side Object Sensor Module - Left and B218R Side Object Sensor Module - Right. The left module is the master and is on the vehicle's serial data bus and communicates to the right module on a private bus. The internal fault detection is handled inside the B218L Side Object Sensor Module - Left. No external circuit diagnosis is involved.

Conditions for Setting the DTC

• The B218L Side Object Sensor Module - Left runs the program to detect an internal fault when power up is commanded.

Conditions for Setting the DTC

The B218L Side Object Sensor Module - Left has detected an internal malfunction

Action Taken When the DTC Sets

• The side object sensor system is disabled.
• The driver information center displays SERVICE SIDE DETECTION SYSTEM

Conditions for Clearing the DTC

• A current DTC clears when the malfunction is no longer present.
• A history DTC clears when the device 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 B218L Side Object Sensor Module - Left.
• Do not replace B218L Side Object Sensor Module - Left based only on DTC B101D being set in history.
• If DTC B101D is set as current, replace the B218L Side Object Sensor Module - Left.
• Since the left module is the master, if it is replaced, there still may be a problem with the right side as the module may have been unable to report it. Once the left module is replaced, check DTCs and verify operation of the system to assure proper functionality.

Reference Information

Schematic Reference

• Data Communication Schematics (Encore) , Data Communication Schematics (Trax)
• Control Module References

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.
2. Verify DTC B101D is not set.

• If DTC B101D is set

1. Replace the B218L Side Object Sensor Module - Left.
2. Verify no new DTCs set and side object system operates properly

• If there are new DTCs refer to Diagnostic Trouble Code (DTC) List - Vehicle , or if the system does not operate properly, refer to Side Object System Malfunction.
• If there are no new DTCs and the side object system operates properly
• If DTC B101D is not set

3. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for B218L Side Object Sensor Module - Left replacement, programming and setup.

READ NEXT: