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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0A7F Hybrid Battery Pack Life
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The Battery Pack does not have enough power and/or energy to support IEO (Idle Engine OFF) and Auto Start events. This occurs when the SOC reaches a set calibration.
Conditions for Clearing the DTC
| • | The DTC will become history if the ESCM no longer detects a fault. |
| • | The history DTC will clear after 100 fault-free ignition cycles. |
| • | The DTC can be cleared with a scan tool. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Test each battery for low charge or over charge. Refer to 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 Generator Battery Replacement . Did you complete the replacement? | Go to Step 4 | -- |
4 |
Does the DTC reset? | Go to Step 2 | System OK |
