Circuit Description
The PCM monitors the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect data input can occur when the voltage is out of range. The PCM monitors the system voltage over an extended length of time. If the PCM detects a system voltage outside an expected range for the calibrated length of time, DTC P0560 will set.
Conditions for Running the DTC
| • | System voltage below 11 volts. |
| • | Engine speed above 1500 RPM. |
| • | Vehicle speed below 40 kph (25 mph). |
Conditions for Setting the DTC
The PCM detects a system voltage out of range for 2 seconds.
Action Taken When the DTC Sets
| • | The PCM will not illuminate the Malfunction Indicator Lamp (MIL). |
| • | The PCM will command a message to be displayed. |
| • | The PCM will store conditions which were present when the DTC set as Fail Records data only. |
Conditions for Clearing the DTC
| • | The PCM 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. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics in Engine Controls -- 3.0L | ||||
1 | Did you perform the Diagnostic System Check for Engine Electrical? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate that the Battery Voltage parameter is greater than the specified range? | 11.0 volts | Go to Step 6 | Go to Step 3 |
3 | Using a scan tool compare the Battery Voltage parameter in the BCM data list with the Battery Voltage parameter in the ECM data list Are the BCM Battery Voltage and ECM Battery Voltage readings different by more than the value specified? | 0.8 volts | Go to Step 4 | Go to Charging System Test |
4 | Test the battery positive voltage circuit of the ECM for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 5 | |
5 | Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 6 | |
6 |
Important: The replacement ECM must be programmed. Refer to Engine Control Module Programming Procedure in Engine Controls 3.0L. Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls 3.0L. Is action complete? | -- | -- | |
7 |
Does the scan tool indicate that DTC P0560 failed this ignition? | -- | System OK | |
