For 1990-2009 cars only
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 Descriptors
DTC P1A26: Hybrid Battery 1 Voltage LowDTC P1A27: Hybrid Battery 1 Voltage Very Low
Circuit/System Description
The battery energy control module (BECM) monitors the hybrid battery 1 voltage to detect if the minimum voltage is less than the calibration value.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
P1A26
Minimum module voltage is less than calibration value for 3 seconds.
P1A27
Minimum module voltage is less than calibration value for 40 ms.
Action Taken When the DTC Sets
The hybrid system is disabled.
Conditions for Clearing the DTC
P1A26, P1A27
System voltage 11-18 volts.
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
P1A26, P1A27
- If other DTCs are set diagnose those first.
- These DTCs are for information only. The DTCs can set in cold weather. Clear the DTC, no diagnostic or removal/replacement procedures are required.
