Powertrain Controls Diagnosis

Circuit Description
Circuit 339 is the ignition voltage feed for the Powertrain Control Module (PCM). Circuit 440 is the battery voltage feed for the PCM.

If the PCM detects a low voltage, a high voltage for a long time or a high voltage, for a short amount of time, then DTC P0560 sets. DTC P0560 is a type D DTC.

Conditions for Running the DTC

System Voltage Low:
^ The engine speed is greater than 1500 RPM.
^ The ignition is ON.

System Voltage High:
^ No engine speed needed.
^ The ignition is ON.

Conditions for Setting the DTC

System Voltage Low:
One of the following conditions exists for greater than 15 seconds.
^ The system voltage is less than 10.5 volts at a maximum transmission temperature of 152°C (305°F) or:
^ The system voltage is less than 6.7 volts at a minimum transmission temperature of -40°C (-40°F).

System Voltage High:
The system voltage is greater than 19 volts for 10 seconds.

Action Taken When the DTC Sets
^ The PCM does not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM causes an immediate landing to second gear.
^ The PCM turns off the PC solenoid valve.
^ The PCM inhibits the TCC engagement.
^ The PCM freezes the shift adapts.
^ The PCM stores DTC P0560 in PCM history.

Conditions for Clearing the DTC
^ A scan tool clears the DTC from PCM history.
^ The PCM clears the DTC from PCM history if the vehicle completes 40 consecutive warm-up cycles without a non-emission-related diagnostic fault occurring.
^ The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM.

Diagnostic Aids
^ Charging the battery with a battery charger and Jumpstarting an engine may set this DTC.
^ If this DTC is set when an accessory is operated, inspect for faulty connections or an excessive current draw.
^ Inspect for faulty electrical connections at the starter solenoid.
^ Inspect for faulty electrical connections at the fusible link.
^ Inspect for loose or damaged terminals at the generator.
^ Inspect the generator belt condition and tension.
^ First diagnose and clear any engine DTCs or Accelerator Pedal Position (APP) sensor codes that are present. Then inspect for any transmission DTCs that may have reset.

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 PCM.
6. This step tests the ignition voltage and battery voltage inputs at the PCM.