The transmission control module (TCM) provides voltage to the pressure control solenoid, the shift solenoids, and the TCC PWM 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. 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, then DTC P1832 sets. DTC P1832 is a type C DTC.
This diagnostic procedure supports the following DTC:
DTC P1832 Pressure Control (PC)/Shift Lock Solenoid Control Circuit High Voltage
The ignition is ON.
The TCM detects at least 6.4 volts at the HSD1 terminal prior to commanding the HSD1 ON.
• | The TCM does not request the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL). |
• | SERVICE VEHICLE SOON displays on the driver information center (DIC). |
• | The TCM commands maximum line pressure. |
• | The TCM freezes transmission adaptive functions. |
• | The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record. |
• | The TCM stores DTC P1832 in TCM history. |
• | The TCM clears the DIC when the condition no longer exists. |
• | A scan tool can clear the DTC. |
• | The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring. |
• | The TCM cancels the DTC default actions when the ignition is OFF long enough in order to power down the TCM. |
Step | Action | Value(s) | Yes | No | ||||
---|---|---|---|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||
2 |
Important:
Did DTC P1832 reset? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections | ||||
3 |
Is the voltage greater than the specified value? | 6.4 volts | Go to Step 4 | Go to Step 5 | ||||
4 | Repair the short to voltage on the HSD1 circuit. Refer to Wiring Repairs . Is the action complete? | -- | Go to Step 6 | -- | ||||
5 | Replace the TCM. Refer to Control Module References for replacement, setup and programming . Is the action complete? | -- | Go to Step 6 | -- | ||||
6 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | Go to Step 7 | Go to Step 2 | ||||
7 | 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? | -- | System OK |