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Chevrolet Silverado / GMC Sierra. Manual - part 2692
The reference voltage drops below 4.75 volts.
B1395 05
The reference voltage exceeds 5.15 volts.
Action Taken When the DTC Sets
All memory recall functions will be disabled.
Conditions for Clearing the DTC
The current DTC will clear 3 seconds after the reference voltage returns to normal operating
range, and the ignition is cycled OFF then back to ACC or RUN.
A history DTC will clear after 50 ignition cycles or with a scan tool using the clear DTCs
function.
Reference Information
Schematic Reference
Driver Seat Schematics
Passenger Seat Schematics
Adjustable Pedal Schematics
Connector End View Reference
Component Connector End Views
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
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Control Module References for Scan Tool Information
Diagnostic Aids
An internal short to ground in one of the position sensors may set this DTC.
Circuit/System Testing
Ignition ON, test for 4.75-5.15 volts between the 5-volt reference circuit and ground.
If less than 4.75 volts, test the 5-volt reference circuit to all position sensors for a short to
ground or an open. If the circuit tests normal, replace the memory seat module.
If greater than 5.15 volts, test the 5-volt reference circuit to all position sensors or a short to
voltage. If the circuit tests normal, replace the memory seat module.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Front Seat Adjuster Replacement (Power)
Front Seat Lumbar Support Replacement
Front Seat Recliner Actuator Motor Replacement
Brake Pedal Assembly Replacement
Control Module References for MSM replacement, setup, and programming
DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, OR B1820
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 B1735 01
Driver Seat Front Up Switch Circuit Short to Battery
DTC B1740 01
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Driver Seat Front Down Switch Circuit Short to Battery
DTC B1745 01
Driver Seat Rear Up Switch Circuit Short to Battery
DTC B1750 01
Driver Seat Rear Down Switch Circuit Short to Battery
DTC B1755 01
Driver Seat Assembly Horizontal Forward Switch Circuit Short to Battery
DTC B1760 01
Driver Seat Assembly Horizontal Rearward Switch Circuit Short to Battery
DTC B1815 01
Driver Seat Recline Forward Switch Circuit Short to Battery
DTC B1820 01
Driver Seat Recline Rearward Switch Circuit Short to Battery
Circuit Description
When the power seat switches are pressed, they send a 12-volt signal through the switch signal
circuits to the memory seat module (MSM). The MSM then commands the driver seat motors to
move in response to the switch signals.
Conditions for Running the DTC
The memory seat module must be powered.
Conditions for Setting the DTC
If a seat switch circuit is active in one direction and the switch for the opposite direction is
pressed, this DTC will set.
Multiple DTCs will set if one of the switch signal circuits is shorted to voltage.
Action Taken When the DTC Sets
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
A motor output driven in response to a switch considered failed, is deactivated for both
directions.
All memory recall commands are ignored.
The MSM will respond to any other switch signal that has not set a DTC.
Conditions for Clearing the DTC
The current DTC will clear and set the code to history, 3 seconds after the fault is no longer
present and the ignition is cycled OFF then back to ACC or RUN.
A history DTC will clear after 50 ignition cycles or with a scan tool using the clear DTCs
function.
Reference Information
Schematic Reference
Driver Seat Schematics
Connector End View Reference
Component Connector End Views
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 Verification
Ignition ON, observe the scan tool seat switch parameters while pressing the appropriate seat
directional switches. The reading should change between Inactive and Active.
2008 Chevrolet Silverado 1500
2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
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