Circuit Description
The engine control module (ECM) or powertrain control module (PCM) monitors the ignition 1 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/ECM monitors the system voltage over an extended length of time. If the PCM/ECM detects the ignition 1 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
| • | System voltage below 9 volts or above 16 volts |
| • | Engine speed above 650 RPM |
Conditions for Setting the DTC
The PCM/ECM detects ignition 1 voltage out of range for 30 seconds.
Action Taken When the DTC Sets
| • | The PCM/ECM will not illuminate the malfunction indicator lamp (MIL). |
| • | The PCM/ECM will command a message to be displayed. |
| • | The PCM/ECM will store conditions which were present when the DTC set as Fail Records data only. |
Conditions for Clearing the DTC
| • | The PCM/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. |
Step | Action | Value | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics in Engine Controls - 2.8L (LP1), or Engine Controls Schematics in Engine Controls - 3.6L (LY7), or Engine Controls Schematics in Engine Controls - 5.7L Connector End View Reference: Engine Control Module Connector End Views in Engine Controls - 2.8L (LP1), or Engine Control Module Connector End Views in Engine Controls - 3.6L (LY7), or Powertrain Control Module Connector End Views in Engine Controls - 5.7L | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool indicate that DTC P0560 has passed this ignition cycle? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the scan tool indicate that the Battery Voltage parameter is within the specified range? | 9-16 V | Go to Step 7 | Go to Step 4 |
4 | Using a scan tool compare the battery voltage with the Ignition 1 voltage parameter in the PCM/ECM data list. Is the battery voltage and PCM/ECM Ignition 1 voltage readings different by more than the value specified? | 0.5 V | Go to Step 5 | Go to Charging System Test |
5 | Test the ignition 1 voltage circuit of the PCM/ECM for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the PCM/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 8 | Go to Step 7 |
7 | Replace the PCM/ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does the scan tool indicate that DTC P0560 failed this ignition? | -- | Go to Step 3 | System OK |
