Circuit Description
The transmission control module (TCM) requires direct battery voltage to operate properly.
DTC P0882 is a type C DTC.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0882 Transmission Control Module (TCM) Power Input Signal Low
Conditions for Running the DTC
Engine speed is greater than 400 RPM for 5 seconds.
Conditions for Setting the DTC
DTC P0882 sets when the TCM detects a battery direct voltage below 8 volts at 0°C (32°F) for a total of 5 out of 7 seconds. The voltage threshold is temperature dependent varying from 5 volts at -60° C (-75°F) to 9 volts at 20° C (68°F).
Action Taken When the DTC Sets
| • | The TCM does not illuminate the malfunction indicator lamp (MIL). |
| • | Hydraulic default is commanded. Shift selector position and hydraulic state of logic valves determine range. |
| • | The TCM inhibits main modulation. |
| • | The TCM inhibits torque converter clutch (TCC) engagement. |
Conditions for Clearing the MIL/DTC
A scan tool can clear the code from TCM history. The TCM automatically clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without failure.
Diagnostic Aids
| • | Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions: |
| - | A bent terminal |
| - | A backed-out terminal |
| - | A damaged terminal |
| - | Poor terminal tension |
| - | A chafed wire |
| - | A broken wire inside the insulation |
| • | When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change. |
| • | You may have to drive the vehicle in order to experience a condition. |
| • | A defective vehicle battery may allow this DTC to set. Test the vehicle battery to verify proper voltage and load capacity. |
| • | A defective vehicle charging system may cause this DTC to set. |
Step | Action | Value | Yes | No |
|---|---|---|---|---|
Schematic Reference: Automatic Transmission Controls Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Important: Before clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. Is voltage within the specified value? | B+ | Go to Diagnostic Aids | Go to Step 3 |
3 |
Does the charge indicator illuminate or the driver information center (DIC) display a charging system message? | -- | Go to Step 5 | Go to Step 4 |
4 | Replace the battery or resolve the battery condition. Refer to Battery Inspection/Test . Did you replace the battery or resolve the battery condition? | -- | Go to Step 6 | -- |
5 | Repair the charging system. Refer to Charging System Test or Generator Replacement . Did you complete the repair? | -- | 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 | |
