• | 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 |
---|---|---|---|---|
IGN I | P0562 | P0562 | -- | -- |
Ground | -- | P0562 | -- | -- |
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.
• | The vehicle speed is above 8 km/h (5 mph). |
• | The system voltage is between 9.5-18 V. |
The ECM detects a system voltage below 10 V.
• | The instrument panel cluster (IPC) illuminates the charge indicator. |
• | The driver information center (DIC) displays the SERVICE BATTERY CHARGING SYSTEM warning message. |
DTC P0562 is a C type DTC.
• | A low voltage DTC in multiple modules indicates a concern in the charging system. |
• | A low voltage value in multiple modules indicates a concern in the charging system. |
• | Inspect the ECM ground connection, to verify that it is clean tight. |
• | Engine Controls Schematics for the 4.3L engine. |
• | Engine Controls Schematics for V8 gas engines. |
• | Engine Controls Schematics for the 6.6L engine. |
Charging System Description and Operation
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If the battery voltage is not within the specified range, refer to Charging System Test. |
• | 4.3L terminal 73 X2. |
• | V8 gas engines terminal 73 X1. |
• | 6.6L terminals 2-4 and 6 X2. |
⇒ | If greater than the specified range, test the ground circuit(s) for an open/high resistance. |
• | 4.3L terminals 19 and 73 X1. |
• | V8 gas engines X1 terminals 19 and 47 X1. |
• | 6.6L terminal 77 X1 and terminals 1-3-5 X2. |
⇒ | If the test lamp does not illuminate , test the Ignition circuits 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.
• | 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 | -- | -- |
The fuel pump control module (FPCM) 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.
The engine is running.
The FPCM detects that the battery voltage is less than 9 V.
DTC P0562 is a type C DTC.
DTC P0562 is a type C DTC.
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. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | 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 FPCM replacement, setup, and programming.