P0560

WITH 4L60-E AUTOMATIC TRANSMISSION

DTC P0560 System Voltage Malfunction Diagram Chart:

System Voltage Malfunction:

CIRCUIT DESCRIPTION
CKT 439 is the ignition voltage feed for the Vehicle Control Module-A (VCM-A). CKT 440 is the battery feed for the VCM-A. DTC Type (D).

DTC P0560 WILL SET WHEN

System Voltage Low
Engine speed greater than 1000 rpm.
System voltage less than 7.3 volts at a minimum transmission temperature of -40°C (-40°F).
System voltage less than 10.0 volts at a maximum transmission temperature of 150°C (302°F).
All conditions met for 4 seconds.

High System Voltage
Ignition "ON" or engine running.
System voltage greater than 19.5 volts.
Conditions met for 2 seconds.

Long Time System Voltage High
Ignition "ON" or engine operating.
System voltage greater than 17.1 volts.
Conditions met for 109 minutes.

ACTION TAKEN (VCM-A will default to)
- Inhibit Torque Converter Clutch (TCC).
- Maximum line pressure.
- Immediate landing to 3rd gear.
- Fourth gear disabled.
- 3-2 downshift solenoid disabled.
- VCM-A will not turn on the Malfunction Indicator Lamp (MIL).

DTC P0560 WILL CLEAR DEFAULT ACTION WHEN
Default condition(s) no longer exist and the ignition is cycled "OFF" for five seconds, then "ON".

DTC P0560 WILL PASS WHEN

High Volts
- VCM-A ignition feed/battery voltage is equal to or less than 19.5 volts.
High Volts - Long Time
- VCM-A ignition feed/battery voltage is equal to or less than 17.1 volts for 4 or more seconds.
Low Volts
- VCM-A ignition feed/battery voltage is equal to or greater than:
- 8.3 volts at minimum transmission temperature of -40°C (-40°F).
- 11 volts at maximum transmission temperature of 150°C (3O2°F).
- All enable criteria are met.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test verifies that normal charging system voltage is between 13.0 and 15.8 volts.
2. This test checks actual battery voltage against voltage recorded at VCM-A.

DIAGNOSTIC AIDS
- Charging the battery with a battery charger and jumping-starting an engine may set DTC(s). If DTC(s) set when an accessory is operated, check for faulty connections or excessive current draw.
- Check for faulty connections at the starter solenoid or fusible link.
- Check for loose/damaged terminals at generator.
- Check belt wear/tension.