2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 577
B1825 5A, B1850 5A, B1860 5A, B2355 5A, B2365 5A, B2375 5A
This DTC will set, if the MSM is controlling a motor in one direction and its position sensor is tracking the motor in the opposite direction. The
sensor is either mounted or wired incorrectly, or the polarity of the motor control circuits are reversed.
Action Taken When the DTC Sets
The MSM disables the memory recall and easy exit/entry action commands of the motor monitored by the sensor. The motor will respond to
manual positioning commands.
Conditions for Clearing the DTC
* The current DTC will clear and set to history, when the MSM sees the analog input from the sensor as between 0.22-4.75 volts and the
ignition is cycled OFF then back to ACC or RUN.
* A history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.
Diagnostic Aids
* All position sensors use common ground and 5-volt reference circuits.
* If the 5-volt reference circuit is shorted to voltage, multiple codes will set.
* If the 5-volt reference circuit is shorted to ground, multiple codes will set.
* If the sensor ground circuit is open, multiple codes will set.
Reference Information
Schematic Reference
Driver Seat Schematics ()
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Memory Seats Description and Operation ()
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Driver Position Module driver seat and lumbar position sensor parameters. The readings should be between
0.22-2.75 volts and change while adjusting seat and lumbar positions.
Circuit/System Testing
B1825 01 or B1825 06
1. Ignition OFF, disconnect the harness connector at the seat recline position sensor.
2. Test for less than 2 ohms between the low reference circuit terminal 1 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 3 and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.
