Transmission Controls Diagnosis

Circuit Description
The TCM continuously monitors the system voltage on two circuits, A828 (terminal 26), and X837 (terminal 54). Circuit A828 is the ignition feed for the TCM. Circuit X837 is the battery feed for the TCM. System voltage that is either abnormally high or abnormally low can adversely affect the transmission electronic components.

When the TCM detects low or high voltage on either circuit, then DTC P0560 will set. DTC P0560 is a type B DTC.

Condition for Running the DTC
The ignition switch is in the RUN position.

Conditions For Setting The DTC

Condition 1:
System voltage is less than 9.0 volts for 2.25 seconds.

Condition 2:
System voltage is greater than 16.0 volts for 2.25 seconds.

Action Taken When the DTC Sets
^ Early production - The TCM illuminates the Service Transmission Lamp (STL) and sends a MIL request to the ECM on the second consecutive drive trip that the diagnostic runs and fails. The ECM then illuminates the MIL.
^ Late production - The TCM flashes the Sport Mode Lamp and sends a MIL request on the second consecutive drive trip that the diagnostic runs and fails. The TCM then illuminates the MIL.
^ The ECM records the operating conditions in the Freeze Frame at the time of the MIL request from the TCM.
^ The transmission operates in the default mode (maximum line pressure, command 4th gear, inhibit TCC, freeze shift adapts).

Conditions for Clearing the MIL/DTC
^ Early production - The TCM turns off the STL as soon as the fault is no longer present.
^ Late production - The TCM stops flashing the sport mode lamp as soon as the fault is no longer present.
^ The ECM turns off the MIL after three consecutive drive trips during which the TCM sends no MIL request.
^ A History DTC clears after forty consecutive warm-up cycles, if no failures are present by this diagnostic or any other emission related diagnostic.
^ The scan tool clears the MIL/DTC.
^ The TCM cancels the DTC default mode actions when the fault no longer exists and the ignition switch is Off long enough in order to power down the TCM.

Diagnostic Aids
Vehicles equipped with Fuel Cap Lamps utilize the Sport Mode lamp to indicate a transmission malfunction. In these vehicles, the Sport Mode Lamp flashes at 200 millisecond intervals when the TCM commands the lamp ON.

Vehicles not equipped with Fuel Cap Lamps are equipped with a dedicated Service Transmission Lamp (STL) on the Instrument Panel Cluster (IPC). The STL illuminates steadily when the TCM commands the lamp ON.

Charging the battery with a battery charger or jump-starting an engine may set this DTC. If DTC sets when operating an accessory, check the circuits that are associated with that accessory for a poor connection or an excessive current draw. Also, check for the following conditions:
^ Loose or damaged terminals at the generator
^ Check the belt for proper tension or wear.

Use the J 35616-A connector test adapter kit for any test that requires probing the TCM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.

Check for the following conditions:
^ Poor connections at the TCM or at the component. Inspect harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
^ Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving any related wiring and connectors. A change in the display may help in order to locate the fault.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests the charging system voltage.
5. This step tests the battery voltage input at the TCM.
6. This step tests the ignition voltage and battery voltage inputs at the TCM.