2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2322
- Downshift Switch Circuit
DTC P0826
- Up and Down Shift Switch Circuit
Diagnostic Fault Information
Circuit/System Description
The driver shift control, also known as the TAP Shift, allows the driver to manually shift transmission modes and gears by pressing the Plus/Minus
button to select the desired range of gears for your current driving conditions by using the driver shift control shift switch located on the automatic
transmission gear shift lever. Pushing the Plus switch will command an upshift and pushing the Minus switch will command a downshift. 12 volt
reference voltage flows from the ignition body control module through the driver shift control switch resistor array to the body control module. The
driver shift control shift system is activated when the gear selector is in the Manual (M) position. The driver shift control system is deactivated in
all other range positions.
Conditions for Running the DTC
* The engine speed is 500-6,500 RPM for at least 5 seconds.
* No DTC P0826.
* The vehicle speed is less than 200 km/h (124 mph) for 5 seconds.
* The transmission fluid temperature is -59 to +159掳C (-74 to +318掳F).
* The system voltage is 11-18 V.
Conditions for Setting the DTC
P0815
The body control module detects an upshift request for 3 seconds when the transmission range selector is in D or 600 seconds in P, R, or N.
P0816
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)
