Engine Electrical
DTC P0562
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0562
- System Voltage Low - ECM
Diagnostic Fault Information
Circuit/System Description
The engine control module (ECM) is supplied voltage by either the ECM/TRANS fuse, or the ECM/TCM fuse, depending on vehicle options. The ECM monitors the battery voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur if the voltage is out of range.
Conditions for Running the DTC
* The vehicle speed is greater than 8 km/h (5 mph).
* Engine speed is above 600 RPM
Conditions for Setting the DTC
The ECM detects that the battery voltage is less than 10 V for 6 seconds.
Action Taken When the DTC Sets
The charge indicator turns ON.
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.
* A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
Diagnostic Aids
A low voltage DTC in multiple modules indicates a concern in the charging system.
Reference Information
Schematic Reference
Starting and Charging Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Charging System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V.
• If not within the specified range, refer to Charging System Test (Charging System Test).
2. Ignition OFF, disconnect the harness connectors at the ECM.
3. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ohms between the ground circuit terminals listed below and ground.
* Terminal 1 X1 (ECM 1.6 LXT)
* Terminal 2 X1 (ECM 1.6 LXT)
* Terminal 17 X1 (ECM 1.6 LXT)
* Terminal 3 (ECM 1.4 L95)
* Terminal 24 (ECM 1.4 L95)
* Terminal 28 (ECM 1.4 L95)
* Terminal 33 (ECM 1.4 L95)
* Terminal 67 (ECM 1.4 L95)
* Terminal 39 X2 (ECM 1.4 LDT)
* Terminal 41 X2 (ECM 1.4 LDT)
* Terminal 37 X2 (ECM 1.4 LDT)
* Terminal 38 X2 (ECM 1.4 LDT)
* Terminal 40 X2 (ECM 1.4 LDT)
* Terminal 39 X2 (ECM 1.2)
* Terminal 41 X2 (ECM 1.2)
* Terminal 37 X2 (ECM 1.2)
* Terminal 38 X2 (ECM 1.2)
* Terminal 40 X2 (ECM 1.2)
* Terminal 73 X1 (ECM 1.5)
* Terminal 73 X2 (ECM 1.6 LDE, LLU AND LXV or 1.8 2HO)
* Terminal 1 (SDM with WHB)
* Terminal 28 (SDM without WHB)
* Terminal 13 (EBCM)
* Terminal 26 (EBCM)
• If greater than the specified range, test the ground circuit for an open/high resistance.
4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.
* Terminal 2 X2 (ECM 1.6 LXT)
* Terminal 18 X2 (ECM 1.6 LXT)
* Terminal 3 X2 (ECM 1.6 LXT)
* Terminal 30 (ECM 1.4 L95)
* Terminal 29 (ECM 1.4 L95)
* Terminal 17 X1 (ECM 1.4 LDT)
* Terminal 1 X1 (ECM 1.4 LDT)
* Terminal 18 X1 (ECM 1.4 LDT)
* Terminal 3 X2 (ECM 1.4 LDT)
* Terminal 17 X1 (ECM 1.2)
* Terminal 1 X1 (ECM 1.2)
* Terminal 18 X1 (ECM 1.2)
* Terminal 3 X2 (ECM 1.2)
* Terminal 62 X1 (ECM 1.5)
* Terminal 22 X1 (ECM 1.5)
* Terminal 1 X1 (ECM 1.5)
* Terminal 3 X1 (ECM 1.5)
* Terminal 14 X1 (ECM 1.6 LDE, LLU AND LXV or 1.8 2HO)
* Terminal 3 X1 (ECM 1.6 LDE, LLU AND LXV or 1.8 2HO)
* Terminal 12 X1 (ECM 1.6 LDE, LLU AND LXV or 1.8 2HO)
* Terminal 31 (SDM with WHB)
* Terminal 32 (SDM with WHB)
* Terminal 59 (SDM without WHB)
* Terminal 26 (SDM without WHB)
* Terminal 1 (EBCM)
* Terminal 14 (EBCM)
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, replace the ECM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning) for ECM replacement, setup, and programming.