GM Service Manual Online
For 1990-2009 cars only

DTC P1833 Non-Hybrid


Object Number: 1715065  Size: MF
Master Electrical Component List
Automatic Transmission Controls Schematics
OBD II Symbol Description Notice
Control Module References

Circuit Description

The transmission control module (TCM) provides voltage to the pressure control solenoid, the shift solenoids, and the torque converter clutch pulse width modulated (TCC PWM) solenoid through 2 separate solid-state devices called high side drivers (HSD) - HSD1 and HSD2. HSD1 provides electrical power to the pressure control solenoid. HSD2 provides power to the shift solenoids and the TCC PWM solenoid. A normal function of the TCM is to run tests on each driver to ensure that it is functioning properly.

When the TCM detects an open or a short to ground on HSD2, DTC P1833 sets. DTC P1833 is a type A 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 is running for 5 seconds and not in fuel cut-off.
    • HSD2 is commanded ON.

Conditions for Setting the DTC

The TCM detects and open or a short to ground on the HSD2 circuit when the HSD2 is commanded ON for 4.4 seconds.

Action Taken When the DTC Sets

    • The TCM requests the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL).
    • The TCM commands an immediate landing to 2nd gear.
    • The TCM commands maximum line pressure.
    • The TCM forces the TCC OFF.
    • The TCM inhibits TCC engagement.
    • The TCM commands HSD2 off.
    • The TCM freezes transmission adaptive function.
    • The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.
    • The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
    • The TCM stores DTC P1833 in TCM history.

Conditions for Clearing the MIL/DTC

    • The ECM turns OFF the MIL after the third 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.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. Important: 

       • Before clearing the DTC, use the scan tool in order to record the ECM Freeze Frame and the TCM Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the ECM and the TCM.
       • Using the Clear Info function erases stored DTCs in both the ECM and TCM.

  4. Record the DTC Freeze Frame and Failure Records.
  5. Clear the DTC.
  6. Turn OFF the ignition for at least 30 seconds.
  7. Start the engine.

Did DTC P1833 reset?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3

  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector.
  3. Turn ON the ignition with the engine OFF.
  4. Clear the DTC.
  5. Turn OFF the ignition for at least 30 seconds.
  6. Start the engine. Additional DTCs may set.

Did DTC P1833 reset?

Go to Step 4

Go to Step 5

4

  1. Disconnect the TCM.
  2. Test the solenoid supply voltage circuit between the AT inline 20-way connector and the TCM for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

5

Test the solenoid supply voltage circuit between the AT inline 20-way connector and each individual solenoid for a short to ground. Refer to Testing for Short to Ground.

Did you find a condition?

Go to Step 8

Go to Step 6

6

Replace the shorted solenoid. Refer to 1-2 Shift Solenoid Valve Replacement , 2-3 Shift Solenoid Valve Replacement , or Torque Converter Clutch Pulse Width Modulation Solenoid Replacement as applicable.

Is the action complete?

Go to Step 9

--

7

Replace the TCM. Refer to Control Module References for replacement, setup, and programming.

Is the action complete?

Go to Step 9

--

8

Replace the internal transmission electrical harness. Refer to Wiring Harness Replacement.

Is the action complete?

Go to Step 9

--

9

Perform the following procedure in order to verify the repair:

  1. Select DTC.
  2. Select Clear Info.
  3. Start and idle the engine for 5 seconds.
  4. Select Specific DTC.
  5. Enter DTC P1833.

Has the test run and passed?

Go to Step 10

Go to Step 2

10

With the scan tool, observe the stored information, capture info and DTC info.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK