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 P0A80: Replace Hybrid Battery PackCircuit/System Description
The battery energy control module (BECM) monitors the battery pack resistance to verify that it is not above the system resistance criteria (55 mOhms) where it will affect the hybrid vehicle performance.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
Pack resistance is greater than resistance criteria. Where resistance criteria = TempFactorLookup + SOCFactorLookup;
Where TempFactorLookup(T) =
Temperature Celsius/Fahrenheit | Resistance in mOhms |
|---|---|
-40/-40 | 0.18 |
-30/-22 | 0.18 |
-20/-4 | 0.18 |
-10/14 | 0.18 |
0/32 | 0.18 |
10/50 | 0.18 |
20/68 | 0.055 |
30/86 | 0.055 |
40/104 | 0.055 |
50/122 | 0.055 |
60/140 | 0.055 |
70/158 | 0.055 |
80/176 | 0.055 |
90/194 | 0.055 |
100/212 | 0.055 |
110/230 | 0.055 |
120/248 | 0.055 |
Where SOCFactorLookup(T) =
State of Charge (SOC) | Resistance in mOhms |
|---|---|
0 | 0.007 |
10 | 0.007 |
20 | 0.004 |
30 | 0.003 |
40 | 0.001 |
50 | 0 |
60 | 0 |
70 | 0 |
80 | 0.015 |
90 | 0.003 |
100 | 0.003 |
Action Taken When the DTC Sets
Does not affect hybrid system operation.
Conditions for Clearing the DTC
The following conditions must be present:
| • | Battery voltage = Valid |
| • | Battery current = Valid |
| • | Battery temperature = Valid |
| • | Battery state of charge = Valid |
| • | Battery resistance low = Valid |
| • | Battery resistance severe low = Valid |
| • | Battery resistance calc. regression = Valid |
| • | All current sensor faults = Not Fail |
| • | All voltage sensor faults = Not Fail |
| • | Battery temperature not less than -7°C (19.4°F) |
| • | Battery state of charge not greater than 90 percent |
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics
Connector End View Reference
Description and Operation
Generator Battery Carrier Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- If the other DCTs are set, they should be diagnosed first.
- Review the vehicle service history to determine if the battery pack has been replaced previously and not been reset with scan tool.
- Install the scan tool. Observe the Calc Hybrid Batt Resistance parameter in the ECM/Hybrid data list.
| ⇒ | If resistance is greater than 55 mOhms, continue with Circuit/System Testing. |
| ⇒ | If resistance is less than 50 mOhms, clear the DTC and road test vehicle to determine if the DTC resets. |
Circuit/System Testing
- Gain access to the hybrid battery pack connections. Refer to Generator Battery Disconnect Control Module Replacement.
- Verify the hybrid battery pack connections are within specifications. Refer to Fastener Tightening Specifications
| ⇒ | If connections are within specifications, replace the battery pack. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
