2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2316
The body control module detects a downshift request for 3 seconds when the transmission range selector is in D or 600 seconds in P, R, or N.
P0826
The body control module detects an invalid voltage from the automatic transmission manual shift switch for 5 seconds.
Action Taken When the DTC Sets
* P0815, P0816, and P0826 are Type C DTCs.
* The body control module disables driver shift control operation.
Conditions for Clearing the DTC
P0815, P0816, and P0826 are Type C DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
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)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
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 Shift Request parameter while toggling between the up shift and down shift with the driver manual shift
switches. The reading should change between Upshift and Downshift.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the S2 transmission manual shift switch.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Verify the scan tool Driver Shift Request parameter is Invalid.
瀚慖f not the specified value, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K9 body control
module.
4. Install a 6.5-7.0K ohm jumper wire between the signal circuit terminal 3 and the B+ circuit terminal 4. Verify the scan tool Driver Shift
Request parameter is None.
瀚慖f not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K9 body control
module.
5. If all circuits test normal, test or replace the S2 transmission manual shift switch.
Component Testing
1. Ignition OFF, disconnect the harness connector at the S2 transmission manual shift switch.
