P0560

DTC P0560

CIRCUIT DESCRIPTION




The engine control module (ECM) monitors the main relay switched voltage on 3 parallel circuits that travel between the underhood fuse block and the ECM. These circuits are tied together internally in the ECM. When ignition voltage is present at the ignition 1 input to the ECM, the ECM will command the main relay ON by grounding the control circuit of the main relay. When the main relay is energized, battery voltage should be present on each ignition 1 circuit at the ECM. The ECM monitors the voltage over an extended length of time. If the ECM detects a voltage outside an expected range for the calibrated length of time, DTC P0560 will set.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0560 System Voltage

CONDITIONS FOR RUNNING THE DTC
- The main relay is commanded ON by the ECM.
- The engine has been running for more than 3 minutes.

CONDITIONS FOR SETTING THE DTC
Circuit voltage is below 2.5 volts for longer than 3 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The ECM will not illuminate the malfunction indicator lamp (MIL).
- The ECM will command a message to be displayed.
- The ECM will store conditions which were present when the DTC set as Failure Records data only.

CONDITIONS FOR CLEARING THE DTC
- The ECM will command the message OFF after one trip in which the diagnostic test has been run and passed.
- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using the scan tool Clear DTC Information function.

TEST

Steps 1-11:

Steps 12-13: