2010 Cadillac CTS Sedan AWD V6-3.6L Page 1680
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and
Relearning) for replacement, setup, and programming.
* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and
Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.
P0801
DTC P0801
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 Descriptor
DTC P0801
- Reverse Lockout Solenoid Control Circuit
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
Battery voltage (B+) is supplied directly to the reverse lockout solenoid. The engine control module (ECM) controls the reverses lockout solenoid
by grounding the control circuit via an internal switch called a low side driver. The low side driver has a fault line which monitors the control
circuit. When the ECM commands the reverse lockout solenoid ON, the voltage on the control circuit should be low, near 0 volts. When the ECM
commands the control circuit to the reverse lockout solenoid OFF, the voltage should be high, near battery voltage.
Conditions for Running the DTC
* The engine is running.
* The vehicle speed is less than 3 km/h (2 mph).
Conditions for Setting the DTC
* The ECM detects that the commanded state of the driver and the actual state of the control circuit does not match.
* The condition exists for 2 seconds.
Action Taken When the DTC Sets
P0801 is a Type C DTC.
Conditions for Clearing the MIL/DTC
P0801 is a Type C DTC.
