2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2321
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.
2. Test for 6.5-7.0K ohm between the signal terminal 3 and the B+ terminal 4 with the switch in the released position.
瀚慖f not the specified value, replace the S2 transmission manual shift switch.
3. Test for 1.5-2.0K ohm between the signal terminal 3 and the B+ terminal 4 with the switch in the plus position.
瀚慖f greater than the specified range, replace the S2 transmission manual shift switch.
4. Test for 3.8-4.0K ohm between the signal terminal 3 and the B+ terminal 4 with the switch in the minus position.
瀚慖f greater than the specified range, replace the S2 transmission manual shift switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Shift Lever Replacement (See: Steering and Suspension/Steering/Steering Column/Service and Repair/Shift Lever Replacement) for
automatic transmission manual shift switch replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for body control module replacement, setup, and
programming.
P0826
DTC P0815, P0816, or P0826
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0815
- Upshift Switch Circuit
