Chevrolet Trax: DTC B1825, B2355, B2365, OR B2375: Driver seat front vertical position
sensor
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 Descriptors
DTC B2355 01
Driver Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06
Driver Seat Front Vertical Position Sensor Circuit Low Voltage/Open
DTC B2365 01
Driver Seat Rear Vertical Position Sensor Circuit Short to Battery
DTC B2365 06
Driver Seat Rear Vertical Position Sensor Circuit Low Voltage/Open
DTC B2375 01
Driver Seat Assembly Horizontal Position Sensor Circuit Short to Battery
DTC B2375 06
Driver Seat Assembly Horizontal Position Sensor Circuit Low Voltage/Open
Diagnostic Fault Information
Circuit Description
The seat memory control module monitors the position of the seat motors by
using hall effect position sensors
which are an internal part of each motor. The module supplies each sensor with a
12 V reference circuit and a
low side signal circuit. During seat motor operation, the hall effect position
sensor provides a determined
number of pulse signals for every revolution of the motor shaft. The scan tool
displays these pulse signals as
counts that range from 0-65,535. The module counts the feedback pulses from each
sensor to determine seat
position and end of travel limits for each of the seat motors. High scan tool
count values indicate forward or
upward seat positions while low count values indicate rearward or downward seat
positions.
Conditions for Running the DTC
- DTC B1325 must not be present.
- Module battery voltage must be between 9-16 V.
Conditions for Setting the DTC
The seat memory control module does not detect position sensor movement or
pulse signals while the adjuster
motor is active. The following conditions will set this DTC:
B2355 01, B2365 01, or B2375 01
The seat memory control module detects a voltage greater than 5 V on the
sensor signal circuit.
B2355 06, B2365 06, or B2375 06
The seat memory control module detects a short to ground or an open on the
sensor signal circuit.
Action Taken When the DTC Sets
- With a short to ground or an open circuit, the seat memory control
module disables the memory recall and
easy exit/entry action commands of the motor monitored by the sensor. The
motor will respond to manual
position commands.
- With a short to battery voltage, the seat memory control module disables
the memory recall and easy
exit/entry action commands for all four seat motors. The motors will respond
to manual position
commands.
Conditions for Clearing the DTC
- The current DTC clears when the fault is no longer present and the power
mode changes to OFF then
back to ACC or RUN.
- The history DTC will clear after 40 consecutive fault-free ignition
cycles have occurred.
Reference Information
Schematic Reference
Driver Seat Schematics (Encore), Driver Seat Schematics (Trax)
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
Memory Seats 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 Testing
- Ignition OFF, disconnect the harness connector at the appropriate driver
seat motor listed below for which
the DTC set:
- M50D Seat Front Vertical Motor - Driver
- M55D Seat Rear Vertical Motor - Driver
- M51D Seat Horizontal Motor - Driver
- Ignition ON.
- Test for greater than 10.8 V between the 12 V reference circuit terminal
2 and ground.
If 10.8 V or less
- Ignition OFF, disconnect the X1 harness connector at the K40 Seat Memory
Control Module.
- Test for infinite resistance between the 12 V reference circuit and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the 12 V reference circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K40 Seat Memory Control Module.
If greater than 10.8 V
- Test for 0.2-2.0 V between the signal circuit terminal 4 and ground.
If less than 0.2 V
- Ignition OFF, disconnect the X1 harness connector at the K40 Seat Memory
Control Module.
- Test for infinite resistance between the signal circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the signal circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K40 Seat Memory Control Module.
If greater than 2.0 V
- Ignition OFF, disconnect the X1 harness connector at the K40 Seat Memory
Control Module,
ignition ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K40 Seat Memory Control Module.
If between 0.2-2.0 V
- Test or replace the seat motor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Front Seat Tilt Adjuster Actuator Replacement
- Driver or Passenger Seat Vertical Adjuster Actuator Replacement
- Front Seat Adjuster Actuator Replacement
- Control Module References for K40 Seat Memory Control Module
replacement, programming and
setup
READ NEXT:
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.
Diag
NOTE: The following steps must be completed before using the
symptom tables.
Perform the Diagnostic System Check - Vehicle before using the Symptom
Tables in order to verify that
all of the foll
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.
Diag
SEE MORE:
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 Descriptors
D
When securing a child restraint in a
rear seating position, study the
instructions that came with the child
restraint to make sure it is
compatible with this vehicle.
If the child restraint has the LATCH
system, see Lower Anchors and
Tethers for Children (LATCH
System) on page 3-50 for how and
wher