Circuit Description
The following DTC is for the batteries located in the energy storage box (ESB):
Battery voltage sensors allow the energy storage control module (ESCM) to monitor the voltage of the batteries in the energy storage box. The ESCM monitors the voltage drop across the battery voltage sensors and uses the inputs for hybrid calculations.
P0A7F is for the hybrid battery pack life.
Conditions for Running the DTC
| • | Engine is running for 30 seconds. |
| • | The starter/generator control module (SGCM) has received voltage on the ignition 0 voltage circuit. |
| • | The SGCM has turned ON and no configuration DTC is present. |
| • | This diagnostic shall be run every 100 milliseconds. |
| • | Reference voltage is stable and accurate. |
Conditions for Setting the DTC
The Battery Pack does not have enough power or energy to support IEO (Idle Engine OFF) and Auto Start events. This occurs when the SOC minimum reaches a set calibration.
Action Taken When the DTC Sets
| • | The powertrain control module (PCM) stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The driver information center (DIC), if equipped, may display a message. |
Conditions for Clearing the DTC
| • | A current DTC Last Test Failed clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic. |
| • | Clear the DTC with a scan tool. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views | ||||
1 | Did you perform the Engine Electrical Diagnostic System Check? | -- | Go to Step 2 | |
2 | Test each battery for low charge or over charge. Refer to battery testing and inspection Battery Inspection/Test . Do the batteries test good? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Replace the appropriate battery. Refer to Battery Replacement Generator Battery Replacement . Did you complete the replacement? | Go to Step 4 | -- | |
4 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
