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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC P0882 or P0883

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0882: TCM Power Input Signal Low

DTC P0883: TCM Power Input Signal High

Circuit/System Description

The transmission control module (TCM) requires continuous battery voltage to operate. The TCM monitors the battery voltage.

Conditions for Running the DTC
    • Engine run time is greater than 10 seconds.
    • Engine speed is greater than 450 RPM.

Conditions for Setting the DTC

P0882

This DTC sets when the TCM detects battery B+ voltage below a threshold based on transmission fluid temperature. Threshold varies from 7.5 V for temperatures below -60°C (-76°F) to 9 V for temperatures above 20°C (68°F).

P0883

This DTC sets when the TCM detects battery B+ Voltage above 18 V 60 percent of the time for a 1 second interval.

Action Taken When the DTC Sets

P0882

    • Hydraulic default is commanded. Shift selector position and the hydraulic state of the shift valves determines the range. Transmission will shift to neutral if the selector is moved to neutral, transmission will shift to reverse or neutral if the selector is moved to reverse, and the transmission will shift to first, third, fifth or neutral if the selector is moved to a forward range.
    • The TCM does not request the engine control module (ECM) to illuminate the malfunction indicator lamp (MIL).
    • DTC P0882 is stored in TCM history.
    • The TCM inhibits torque converter clutch (TCC) engagement.
    • Main modulation is disabled.

P0883

    • Hydraulic default is commanded. Shift selector position and the hydraulic state of the shift valves determines the range. Transmission will shift to neutral if the selector is moved to neutral, transmission will shift to reverse or neutral if the selector is moved to reverse, and the transmission will shift to first, third, fifth or neutral if the selector is moved to a forward range.
    • The TCM does not request the ECM to illuminate the MIL.
    • DTC P0883 is stored in TCM history.
    • The TCM inhibits TCC engagement.
    • Main modulation is disabled.

Conditions for Clearing the DTC

DTCs P0882 and P0883 are Type C DTCs.

Diagnostic Aids

P0882

    • A defective vehicle battery may allow this code to set.
    • A defective vehicle charging system may allow this code to set.
    • You may have to drive the vehicle in order to experience a condition.
    • Vehicle accessories imposing a large electrical load on the battery circuit could cause this DTC to set.
    • Although this DTC could indicate an internal voltage condition within the TCM, in most cases, the TCM is not at fault. Investigate thoroughly prior to replacing the TCM.

P0883

    • A defective vehicle charging system may allow this code to set.
    • You may have to drive the vehicle in order to experience a condition.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

    •  Transmission General Description
    •  Transmission Component and System Description
    •  Electronic Component Description

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The reading should be between 12.6-15 V.
    2. ⇒If not the expected value, refer to Battery Charging.
  2. Observe the scan tool TCM ignition voltage parameter. The reading should be between 12.6 and 15 V.
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

    Note: You must perform the Circuit/System Testing first.

  1. Ignition OFF, disconnect the harness connector at the TCM.
  2. Ignition OFF, test for less than 3 ohms between ground circuit terminal 9 and battery ground, and between ground circuit terminal 69 and battery ground.
    3. ⇒If greater than the specified range, repair the affected ground circuit.
  3. Ignition OFF, verify that a test lamp illuminates between battery B+ circuit terminal 10 and ground, and battery B+ circuit terminal 70 and ground.
    4. ⇒If the test lamp does not illuminate, test the affected B+ circuit for a short to ground or an open/high resistance. If circuit tests normal, replace the TCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Wiring Harness Replacement
    •  Control Module References for TCM replacement, setup, and programming

Repair Verification

If another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure.