P1833
DTC P1833
Circuit Description
The transmission control module (TCM) provides voltage to the pressure control solenoid, the shift solenoids, and the TCC PWM solenoid through 2 separate solid-state devices called high side drivers, called HSD1 and HSD2. HSD1 provides electrical power to the pressure control solenoid. HSD2 provides power to the shift solenoids. A normal function of the TCM is to run tests on each driver to ensure that it is functioning properly.
When the TCM detects a short to ground on HSD2, then DTC P1833 sets. DTC P1833 is a type B DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P1833 Torque Converter Clutch (TCC)/Shift Solenoid (SS) Control Circuit Low Voltage
Conditions for Running the DTC
The engine run time is greater than 5 seconds.
Conditions for Setting the DTC
The TCM detects a short to ground on the HSD2 circuit when the HSD2 is commanded ON.
Action Taken When the DTC Sets
* The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL) during the second consecutive drive trip in which the Conditions for Setting the DTC are met.
* The TCM turns off power to all solenoids.
* The transmission will operate in fifth gear if the vehicle has successfully completed a 1-2 upshift in the current ignition cycle. If the vehicle has not completed a 1-2 upshift in the current ignition cycle, the transmission will operate in fourth gear.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCC is disabled.
* At the time of the first failure, the TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
* At the time of the second failure, the ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as a Freeze Frame.
* The TCM stores DTC P1833 in TCM history.
Conditions for Clearing the MIL/DTC
* The ECM turns OFF the MIL after the sixth consecutive drive trip in which the TCM does not send a MIL illumination request.
* A scan tool can clear the MIL/DTC.
* The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring.
* The TCM cancels the default actions when the ignition is OFF long enough in order to power down the TCM.
