* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Ignition OFF, disconnect the X1 harness connectors at the drive motor generator battery control module.
3. Ignition OFF, scan tool disconnected, open and close the driver door and wait 1 minute. Test for less than 5 ohm between the ground circuit
terminal 11 and ground.
锟斤拷If greater than the specified range, test the ground circuit for an open/high resistance.
4. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
锟斤拷If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 12 and ground.
锟斤拷If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the serial data gateway module.
6. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module or serial
data gateway module replacement, setup, and programming
P1A01
DTC P0A1F, P1A01, P1A05, or P1A06
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0A1F
- Battery Energy Control Module Internal Performance
DTC P1A01
- Battery Energy Control Module Long Term Memory Performance
DTC P1A05
- Battery Energy Control Module Random Access Memory (RAM)
DTC P1A06
- Battery Energy Control Module Read Only Memory (ROM)
Circuit/System Description
The drive motor generator battery control module will diagnose its own systems and determine when a fault condition is present. Diagnostics and
system status is communicated from the drive motor generator battery control module to the drive motor generator control module through serial
data. The drive motor generator control module is the host controller for diagnostic trouble code (DTC) information.
