P0561

DTC P0561

Diagnostic Instructions

* Perform theDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC P0561
- System Voltage Performance




Circuit/System Description

The transmission control module (TCM) requires a switched ignition voltage input to operate. The TCM continuously monitors the ignition voltage.


Conditions for Running the DTC

The engine is running.


Conditions for Setting the DTC

Condition 1

DTC sets when the TCM detects ignition voltage below 6.5 V for 1 second.

Condition 2

DTC sets when the TCM detects a variation in ignition voltage greater than 4 V for a number of samples within 1 second.


Action Taken When the DTC Sets

* The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
* DTC P0561 is stored in TCM history.



Conditions for Clearing the DTC

DTC P0561 is a Type C DTC.


Diagnostic Aids

* 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.
* 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.



Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

* Transmission General Description (Transmission General Description)
* Transmission Component and System Description (Transmission Component and System Description)
* Electronic Component Description (Electronic Component Description)

Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) 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 and 15 V.

• If not the expected value, refer toBattery Charging (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 also ground circuit terminal 69 and battery ground.

• If greater than the specified range, repair the affected ground circuit.

3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 63 and ground.

• If the test lamp does not illuminate, repair the ignition circuit.
• If circuit tests normal, replace the TCM.




Repair Instructions

Perform theDiagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning) for TCM replacement, setup, and programming.


Repair Verification

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