For 1990-2009 cars

## DTC P0562 3.6L (LY7)

### Circuit Description

The engine control module (ECM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect input can occur when the voltage is out of range. The ECM monitors the system voltage over an extended length of time. If the ECM detects an excessively low system voltage, DTC P0562 will set.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0562 System Voltage Low

### Conditions for Running the DTC

• | The engine run time is more than 180 seconds.

• | DTC P0562 runs continuously once the above condition is met for up to 2 seconds.

### Conditions for Setting the DTC

The ECM detects a system voltage below 10 volts for 4 seconds.

### Action Taken When the DTC Sets

• | The ECM will command the charge indicator to be illuminated on the instrument panel cluster (IPC).

• | The ECM will not illuminate the malfunction indicator lamp (MIL).

• | 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.

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Engine Controls Schematics Connector End View Reference: Component Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Ignition 1 Signal parameter in the Engine Control Module (ECM) data list.

Does the scan tool indicate that the Ignition 1 Signal parameter is greater than the specified value?

10.5V

Go to Step 7

Go to Step 3

3 | Measure the voltage at the battery terminals and compare it with the Ignition 1 Signal parameter in the ECM data list. Are the battery voltage and Ignition 1 Signal readings different by more than the value specified? | 0.5V | 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. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 5
5 | Test the ground circuit of the ECM for a high resistance. Refer to Circuit Testing and Wiring Repairs. 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 ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7
7 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 8 | --
8 |

1. Review and record the scan tool Failure Records data.
2. Use the scan tool in order to clear the DTCs.
3. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
4. Using the scan tool, observe the Specific DTC Information for DTC P0562 until the test runs.

Does the scan tool indicate that DTC P0562 failed this ignition cycle?

--

Go to Step 2

System OK

## DTC P0562 4.6L (LH2)

### Circuit Description

The engine control module (ECM) monitors the system voltage to ensure that the voltage stays within the proper range. Damage to components and incorrect input can occur when the voltage is out of range. The ECM monitors the system voltage over an extended length of time. If the ECM detects an excessively low system voltage, DTC P0562 will set.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0562 System Voltage Low

### Conditions for Running the DTC

• | The engine run time is more than 180 seconds.

• | DTC P0562 runs continuously once the above condition is met for up to 2 seconds.

### Conditions for Setting the DTC

The ECM detects a system voltage below 10 volts for 4 seconds.

### Action Taken When the DTC Sets

• | The ECM will command the charge indicator to be illuminated on the instrument panel cluster (IPC).

• | The ECM will not illuminate the malfunction indicator lamp (MIL).

• | 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 forty 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 | Values | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Engine Controls Schematics Connector End View Reference: Component Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Ignition 1 Signal parameter in the Engine Control Module (ECM) data list.

Does the scan tool indicate that the Ignition 1 Signal parameter is greater than the specified value?

10.5V

Go to Step 7

Go to Step 3

3 | Measure the voltage at the battery terminals and compare it with the Ignition 1 Signal parameter in the ECM data list. Are the battery voltage and Ignition 1 Signal readings different by more than the value specified? | 0.5V | 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. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 5
5 | Test the ground circuit of the ECM for a high resistance. Refer to Circuit Testing and Wiring Repairs. 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 ECM. Refer to Testing for Intermittent Conditions and Poor Connections. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7
7 | Replace the ECM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 8 | --
8 |

1. Review and record the scan tool Failure Records data.
2. Use the scan tool in order to clear the DTCs.
3. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
4. Using the scan tool, observe the Specific DTC Information for DTC P0562 until the test runs.

Does the scan tool indicate that DTC P0562 failed this ignition cycle?

--

Go to Step 2

System OK