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Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the seat adjuster switch. 2. Test for infinite resistance between each seat direction signal terminal and the switch B+ terminal with the switch in the open position. If not Inactive, test the signal circuit that displays Active for a short to voltage. If the 3. If all circuits test normal, test or replace the seat adjuster switch. Component Testing 1. Ignition OFF, disconnect the harness connector at the seat adjuster switch. 2. Test for infinite resistance between each seat direction signal terminal and the switch B+ terminal with the switch in the open position. If less than infinite resistance, replace the switch. 3. Test for less than 1 ohm of resistance between each seat direction signal terminal and the B+ terminal with the switch in the closed position. If greater than 1 ohm, replace the switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Power Seat Switch Replacement Control Module References for memory seat module replacement, setup, and DTC B1825, B1850, B1860, B2355, B2365, OR B2375 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 B1825 01 Driver Seat Recline Position Sensor Circuit Short to Battery
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DTC B1825 06 Driver Seat Recline Position Sensor Circuit Short to Ground or Open DTC B1825 5A Driver Seat Recline Position Sensor Circuit Plausibility Failure DTC B1850 01 Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Battery DTC B1850 06 Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open DTC B1850 5A Driver Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure DTC B1860 01 Driver Seat Lumbar Vertical Position Sensor Circuit Short to Battery DTC B1860 06 Driver Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open DTC B1860 5A Driver Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure DTC B2355 01 Driver Seat Front Vertical Position Sensor Circuit Short to Battery DTC B2355 06 Driver Seat Front Vertical Position Sensor Circuit Short to Ground or Open DTC B2355 5A
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Driver Seat Front Vertical Position Sensor Circuit Plausibility Failure DTC B2365 01 Driver Seat Rear Vertical Position Sensor Circuit Short to Battery DTC B2365 06 Driver Seat Rear Vertical Position Sensor Circuit Short to Ground or Open DTC B2365 5A Driver Seat Rear Vertical Position Sensor Circuit Plausibility Failure DTC B2375 01 Driver Seat Assembly Horizontal Position Sensor Circuit Short to Battery DTC B2375 06 Driver Seat Assembly Horizontal Position Sensor Circuit Short to Ground or Open DTC B2375 5A Driver Seat Assembly Horizontal Position Sensor Circuit Plausibility Failure Circuit Description The position sensor that sets this diagnostic trouble code (DTC) is either attached to the seat Conditions for Running the DTC The memory seat module must be powered. Conditions for Setting the DTC B1825, B1850, B1860, B2355, B2365, B2375 01 If the MSM sees the analog input from this sensor is greater than 4.65 volts, the sensor will be
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
considered out of range and the MSM will set this DTC. B1825, B1850, B1860, B2355, B2365, B2375 06 If the MSM sees the analog input from this sensor is less than 0.27 volt, the sensor will be B1825, B1850, B1860, B2355, B2365, B2375 5A This DTC will set, if the MSM is controlling a motor in one direction and it's position sensor is Action Taken When the DTC Sets The MSM disables the memory recall and easy exit/entry action commands of the motor Conditions for Clearing the DTC The current DTC will clear and set to history, when the MSM sees the analog input from the A history DTC will clear after 50 ignition cycles or with a scan tool using the clear DTCs 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
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Power Seats - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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