6T30/6T40/6T45/6T50 - Automatic Transmission
DTC P0562 or P0563
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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/System Description
The transmission control module (TCM) continuously monitors the system voltage on the Ignition 1 voltage circuit. 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. Theses DTC detects high or low TCM voltage for an extended period.
Conditions for Running the DTC
P0562
* Ignition voltage was greater than 5.0 volts, and has not dropped below 2.0 volts.
* Engine speed is greater than 1,200 RPM.
P0563
Ignition voltage was greater than 5.0 volts, and has not dropped below 2.0 volts.
Conditions for Setting the DTC
P0562
TCM detects ignition voltage is 11 volts or less for 4 seconds in a period of 12 seconds.
P0563
TCM detects ignition 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 center (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 6T30/6T40/6T45/6T50 - Automatic Transmission
Connector End View Reference
* Component Connector End Views Connector End Views By Name
* Inline Harness Connector End Views Connector End Views By Number
Description and Operation
* Charging System Description and Operation Description and Operation
* Transmission Component and System Description Transmission Component and System Description
* Electronic Component Description Electronic Component Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Special Tools
DT-48616-10 - Adapter Harness
For equivalent regional tools, refer to Special Tools 6T30/6T40/6T45/6T50 - Automatic Transmission.
Circuit/System Verification
1. Test for 12.6-15.0 volts between the battery terminals with the engine running, accessories OFF.
• If not between 12.6-15 volts
Refer to Charging System Test Initial Inspection and Diagnostic Overview.
• If between 12.6-15 volts
2. Verify the scan tool TCM Ignition Voltage parameter is between 12.6-15.0 volts.
• If not between 12.6-15 volts
Refer to Circuit/System Testing below.
• If between 12.6-15 volts
3. 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 Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
1. Ignition OFF, and all vehicle systems OFF, disconnect the X1 14-way harness connector at the transmission.
2. Connect the DT-48616-10 - harness to the vehicle wire harness X1 14-way transmission connector.
3. Test for less than 5 ohms between the ground circuit terminal 2 and ground.
• If 5 ohms or greater
Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 5 ohms
4. Ignition ON.
5. Verify a test lamp illuminates between terminal 1 and ground at the transmission case.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 ohms in the B+ circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF.
2. Test the B+ circuit for a short to ground.
• If B+ circuit has a short to ground, repair the short to ground on the circuit.
• If B+ circuit does not have a short to ground, replace the fuse.
• If the test lamp illuminates
6. Verify a test lamp illuminates between terminal 12 and ground at the transmission case.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF.
2. Test the ignition circuit for a short to ground.
• If ignition circuit has a short to ground, repair the short to ground on the circuit.
• If ignition circuit does not have a short to ground, replace the fuse.
• If the test lamp illuminates
7. Replace the Q8 control solenoid valve assembly.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
* Refer to Control Module References Programming and Relearning for control solenoid valve assembly replacement, programming and setup.
* Perform the Transmission Adaptive Values Learn Programming and Relearning following all transmission related repairs.