• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
B+ | P0562 | P0562 | -- | -- |
Ground | -- | P0562 | -- | -- |
Circuit | Short to ground | Open | Short to voltage |
---|---|---|---|
Operating Conditions: Key On, engine Off. Parameter Normal Value: 12.6 Volts | |||
B+ | 0.0 Volts | 0.0 Volts | 12.6 Volts |
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 system 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. If the ECM detects that the system voltage is low, then DTC P0562 sets.
• | The vehicle speed is greater than 8 km/h (5 mph). |
• | The system voltage is between 9.5-18 volts. |
The ECM detects that the system voltage is less than 10 volts for 5 seconds.
The charge indicator turns ON.
• | 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. |
A low voltage DTC in multiple modules indicates a concern in the charging system.
• | Engine Controls Schematics for the 2.0L (LNF) engine |
• | Engine Controls Schematics for the 2.2L (L61) engine |
• | Engine Controls Schematics for the 2.4L (LE5) engine |
Charging System Description and Operation
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If not within the specified range, refer to Charging System Test . |
• | Terminal 1 X2 (LNF) |
• | Terminal 2 X2 (LNF) |
• | Terminal 4 X2 (LNF) |
• | Terminal 73 X2 (L61/LE5) |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
• | Terminal 56 X2 (LNF) |
• | Terminal 20 X1 (L61/LE5) |
⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, setup, and programming.