To the top of the document
Orlando
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

DTC P0562 or P0563

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 P0562: System Voltage Low Voltage

DTC P0563: System Voltage High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

High Resistance

Short to Voltage

Signal Performance

Battery Voltage

P2534

P0562, P2534

-

P0562, P2534

Ground

--

P0562, P2534

-

P0722, P0723

Circuit/System Description

The transmission control module (TCM) continuously monitors the system voltage on the Ignition 1 voltage circuits. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation, which may result in internal damage. These DTCs detect high or low TCM voltage for an extended period.

Conditions for Running the DTC

P0562

    • Ignition voltage was greater than 6.0 volts, and has not dropped below 2.0 volts.
    • Engine speed is greater than 1,200 RPM.

P0563

The ignition voltage was greater than 6.0 volts, and has not dropped below 2.0 volts.

Conditions for Setting the DTC

P0562

The TCM detects system voltage is 11 volts or less for 4 seconds in a period of 12 seconds.

P0563

The TCM detects system voltage is 18 volts or greater for 10 seconds in a period of 12 seconds.

Action Taken When the DTC Sets

DTCs P0562 and P0563 are Type C DTCs.

Conditions for Clearing the DTC

DTCs P0562 and P0563 are Type C DTCs.

Diagnostic Aids

    • Observe the driver information centre (DIC) messaging that would indicate the electrical system requires service.
    • Inspect for the following conditions:
       - Loose or damaged terminals at the generator
       - Loose or worn generator drive belt
    • Running the engine with a battery charger attached may cause DTC P0563 to set.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

    •  Component Connector End Views
    •  Inline Harness Connector End Views

Description and Operation

    •  Charging System Description and Operation
    •  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

Special Tools

DT-48616-10 Adapter Harness

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification

  1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals with a DMM. The voltage should be between 12.6-15.0 volts.
  2. If not within the specified range, or the charge indicator light is ON, refer to Charging System Test .
  3. Observe the scan tool TCM Ignition Voltage parameter. The reading should be between 12.6-15.0 volts.
  4. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections .

Circuit/System Testing

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

  1. Ignition OFF, disconnect the 14-way harness connector at the transmission.
  2. Connect the DT-48616-10 harness to the 14-way transmission harness connector.
  3. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
  4. If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Ignition ON, verify that a test lamp illuminates between the B+ terminal and ground, and the ignition circuit terminals listed below and ground.
  6. • Terminal 1
    • Terminal 12
    • Terminal 13
    If the test lamp does not illuminate, test the affected B+ or ignition circuit for a short-circuit to ground or an open/high resistance.
  7. If all circuits test normal, replace the control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    • Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • Refer to Control Module References for control solenoid valve assembly replacement, set-up, and programming.
    • Perform the Transmission Adaptive Values Learn following all transmission related repairs.
   


© Copyright Chevrolet. All rights reserved