For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P0563: System Voltage HighCircuit/System 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 data may occur when the voltage is out of range.
Conditions for Running the DTC
| • | The vehicle speed is greater than 8 km/h (5 mph). |
| • | The system voltage is between 9.5-18 volts. |
Conditions for Setting the DTC
The ECM detects a system voltage above 16 volts for 1 second.
Action Taken When the DTC Sets
| • | The ECM will command the charge indicator to be illuminated on the instrument panel cluster (IPC). |
| • | The driver information center (DIC) will display the CHECK CHARGE SYSTEM message. |
| • | The ECM will not illuminate the malfunction indicator lamp (MIL). |
| • | The ECM will store conditions, which were present when the DTC set as Fail Records data only. |
Conditions for Clearing the DTC
| • | The ECM will command the indicator and 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 possible cause of this DTC could be overcharging with a battery charger or jump starting. |
| • | A high voltage DTC in multiple modules indicates a concern in the charging system. |
Reference Information
Schematic Reference
| • | Engine Controls Schematics for the 2.4L (LAT/LE5) engine |
| • | Engine Controls Schematics for the 3.5L (LZ4) engine |
| • | Engine Controls Schematics for the 3.6L (LY7) engine |
Connector End View Reference
Description and Operation
Starting System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
- If all circuits test normal, replace the ECM.
| ⇒ | If not within the specified range, refer to Charging System Test . |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, setup, and programming
