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DTC P0562, P0563, or P2534

DTC P0562, P0563, or P2534

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

DTC P2534

Ignition On/Start Switch Circuit Low Voltage

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Ignition P0562, P2534 P0562, P2534 P0563 -
Ground - P0562, P2534 - -


Circuit/System Description

The transmission control module (TCM) within the control solenoid valve assembly continuously monitors the system voltage on the ignition 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. These DTCs detect high or low TCM voltage for an extended period.

Conditions for Running the DTC


P0562

Ignition voltage was 6.0 volts or greater and has not dropped below 2.0 volts.

Engine speed is 1,200 RPM or greater.


P0563

Ignition voltage was 6.0 volts or greater and has not dropped below 2.0 volts.


P2534

Engine is running.

Normal CAN communication is enabled.


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.

P2534

The TCM detects ignition voltage between 2.0 volts and 6.0 volts for 7 seconds or greater with the engine running.

Action Taken When the DTC Sets

P0562 and P0563

DTCs P0562 and P0563 are Type C DTCs.


P2534

DTC P2534 is a Type A DTC.

The TCM turns the high side driver OFF.

The TCM commands maximum line pressure.

The TCM freezes transmission adaptive functions.

The TCM commands the torque converter clutch (TCC) OFF.

The TCM limits the transmission to Reverse and fifth gear operation.

The TCM inhibits Tap Up/Down function.

The TCM inhibits manual shifting of forward gears.


Conditions for Clearing the DTC


DTCs P0562 and P0563 are Type C DTCs.

DTC P2534 is a Type A DTC.


Diagnostic Aids


Observe the driver information center (DIC) messaging that would indicate the electrical system requires service.

Running the engine with a battery charger attached may cause DTC P0563 to set.

Inspect for the following conditions:

- Loose or damaged terminals at the generator

- Loose or worn generator drive belt


Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference


Component Connector End Views

Inline Harness Connector End Views


Description and Operation

Transmission General 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-47825-20 Adapter Harness

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification


1. Engine running and accessories OFF. Measure and record the battery voltage at the battery terminals. The voltage should be between 12.6-15.0 volts.

2. If the voltage is 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 you complete the steps described above, check the diagnostic trouble code is not reset by driving the vehicle according to the conditions for running diagnostic trouble codes (DTC). You can also drive the vehicle according to the conditions you see in Freeze Frame/ Failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections .


Circuit/System Testing


1. Ignition OFF, disconnect the X1 20-way harness connector at the transmission.

2. Connect the DT-47825-20 to the vehicle wire harness X1 20-way transmission connector.

3. Test for less than 10 ohms between the ground circuit terminals listed below and ground.

Terminal 1

Terminal 18

If greater than the specified range, test the ground circuit for an open/high resistance.

4. Ignition ON, verify that a test lamp illuminates between the ignition and B+ circuit terminals listed below and ground.

Terminal 10

Terminal 13

Terminal 15

5. If the test lamp does not illuminate, test the affected ignition or B+ circuit for a short to ground or an open/high resistance.

6. If all circuits test normal, replace the Q8 control solenoid valve assembly.


Repair Instructions

Note
Perform the Resetting of the transmission's adaption after all transmission repairs.

Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .


Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control solenoid valve assembly replacement, setup, and programming