GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2005 🢒 Calais 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 5L40-E/5L50-E 🢒 DTC P1832

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 solenoid through two 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 and the torque converter clutch 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 a short to voltage on HSD1 driver circuit, then DTC P1832 sets, which is a type 'C' DTC.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The TCM detects greater than 6.4 volts at the HDS1 terminal prior to commanding the HSD1 on.

Action Taken When the DTC Sets
    • The TCM does not request the Powertrain Interface Module (PIM) to illuminate the Check Powertrain Malfunction Indicator Lamp (MIL).
    • The TCM turns off the pressure control solenoid (causing maximum line pressure).
    • The TCM freezes the transmission adaptive learning function.
    • At the time of the first failure, the TCM records the operating conditions when the 'Conditions for Setting the DTC' have been met. The TCM stores this information as a failure record.

Conditions for Clearing the MIL/DTC
    • Tech 2 can clear the DTC.
    • The TCM clears the DTC from its memory (history DTC) if the vehicle completes 40 warm-up cycles without a non-emission related DTC occurring.
    • The TCM cancels the default actions when the ignition is off long enough to power down the TCM.
    • The TCM clears the multi-info display when the condition no longer exists.

Step

Action

Values

Yes

No

Schematic Reference: Automatic Transmission Controls Schematics

For information on testing wiring faults, refer to Wiring Systems.

1

Has the Diagnostic System Check - Automatic Transmission been completed?

--

Go to Step 2

Go to Diagnostic System Check - Automatic Transmission

2
  1. Connect Tech 2 to the DLC.
  2. Ignition ON, engine OFF.
  3. Clear the DTCs.
  4. Turn ignition OFF for at least 30 seconds.
  5. Start the engine.

Did DTC P1832 reset?

--

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

3
  1. Ignition OFF.
  2. Disconnect the TCM
  3. Using a digital voltmeter, measure voltage at the transmission wiring harness TCM connector A112-T68, HSD1 circuit 1228, terminal X1-3.

Is the voltage grater than the specified value?

More than 6.4 Volts

Go to Step 4

Go to Step 5

4

Repair the short to voltage on the HSD1 circuit.

Is the action complete?

--

Go to Step 6

--

5

Replace TCM. Refer to Transmission Control Module Replacement.

Is the replacement complete?

--

Go to Step 6

--

6
  1. Perform the following operation to verify the repair:
    2. 1.1. Select DTC on Tech 2.
    1.2. Select 'Clear info'.
    1.3. Ignition ON, engine OFF.
  2. Operate the vehicle in the Conditions for Running the DTC.

Has the test run and passed?

--

System OK

Go to Step 2

When all diagnosis and repairs are completed, clear all DTCs and verify correct operation.