Drive Motor Generator Battery Control Module Scan Tool Information

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The Drive Motor Generator Battery Control Module Scan Tool Data List contains all Hybrid Battery related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.

Use the scan tool data values under the following conditions:

The Diagnostic System Check - Vehicle is complete.
The On-Board Diagnostics are functioning properly.
There are no diagnostic trouble codes (DTCs) present.

IMPORTANT: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.

Only the parameters listed below are referenced in this manual for diagnosis. If a scan tool displays other parameters, those values are not recommended by General Motors for use in diagnosis.

If all values are within the expected range described below, refer to Symptoms - Hybrid Energy Storage for diagnosis.

The scan tool values from a properly running vehicle may be used for comparison with the vehicle you are diagnosing. The values below represent a typical display recorded from a properly functioning system.

Scan Tool Data Parameters

Parameter	System State	Expected Value	Description
Operating Conditions: Engine at idle, upper radiator hose hot, closed throttle, transmission in Park, closed loop operation, accessories OFF, brake pedal not applied, Hood Open, State of charge 60-80 percent.
300 V Isolation Test Conditions Met	Yes/No	No	This parameter displays the status of the high voltage (HV) system as determined by the drive motor generator control module. This parameter indicates if the isolation test will run at the next High voltage power down cycle. Should display "Yes" after the ignition is cycled to "Off" and before the isolation test runs.
300 V Isolation Test Status	Not Run/In Progress/Passed/Failed	Passed or In Progress	This parameter displays the status of the "300 V Isolation Test" diagnostic after running during normal vehicle operation or after running the special functions device control located under the drive motor generator control module menu. This parameter can display Not Run, In Progress, Passed, or Failed.
Air Bags Deployed	Yes/No	No	This parameter displays information about contactor open reasons as determined by the drive motor generator control module. "Yes" indicates that an airbag deployment or high voltage circuit impact detection (HVCID) sensor activation has occurred.
Calc. Hybrid Batt. Current	amps	-2.00 to +2.00 amps	This parameter displays the hybrid battery current as determined by the drive motor generator control module. This is a discreet input to the drive motor generator control module from the current sensor located in the drive motor generator battery. The drive motor generator control module displays this current sensor parameter in Amps. This is a signed value. "+" sign represents energy being used from the hybrid battery or discharge and "-" sign represents energy being provided back to the hybrid battery or charge.
Calc. Hybrid Batt. Resistance	Ohms	0.48 ohms	This parameter displays the total impedance (in ohms) of the hybrid battery, as calculated by the drive motor generator control module. The drive motor generator control module uses all 22 hybrid battery resistance measurement values in this calculation.
Contactor Commanded Open	Yes/No	No	This parameter displays information about the high voltage contactor commanded position as determined by the drive motor generator control module. "Yes" indicates that the drive motor generator control module is commanding the contactors to open.
Contactor Sys. Req. Signal	Open/Closed	Closed	This parameter displays the requested contactor state command from the hybrid powertrain control module to the drive motor generator control module over the communication circuit for the hybrid battery contactor control as determined by the drive motor generator control module. This can Display open or closed.
Contactor Sys. Req. CKT Command	%	30%	This parameter displays the discrete PWM command from the hybrid powertrain control module for the hybrid battery contactor control as determined by the drive motor generator control module.
Contactor System Status	Open/Closed/Precharging/Precharge Failed/Precharge Inhibit	Closed	This parameter displays the status of the hybrid battery contactor system as determined by the drive motor generator control module. The status can be displayed as open, closed, precharging, precharge failed or precharge inhibit.
Control Module Voltage Signal	Yes/No	No	This parameter displays the state of the control module voltage supply circuit. The drive motor generator control module. "Yes" indicates that control module voltage supply is present.
Control Module Voltage	V	13.7-14.5 V	This parameter displays the value of the input voltage used to power up the drive motor generator control module, as measured by the drive motor generator control module.
HVIC Fault	Yes/No	No	This parameter displays information about contactor open reasons as determined by the drive motor generator control module. "Yes" indicates that The high voltage interlock circuit has a fault.
HVIC Return Current	mA	6.00 mA	This parameter displays the amount of return current in milli amps returning back to the drive motor generator control module for high voltage interlock circuit detection as determined by the drive motor generator control module.
HVIC Source Current	mA	6.25 mA	This parameter displays the amount of current sourced in milli amps for high voltage interlock current detection circuit as determined by the drive motor generator control module.
Hybrid Batt. Charge Hrs.	Ahrs	Varies	This parameter displays the total accumulated amount of amp hours charged or put in to the hybrid batteries as determined by the drive motor generator control module). This information will be reset to 0 when the drive motor generator control module is reprogrammed or replaced.
Hybrid Batt. Charge Pwr Available	Watts	29100 to 30000 Watts	This parameter displays the charge power available in watts from the hybrid battery as determined by the drive motor generator control module power limit calculation.
Hybrid Batt. Current Sensor	V	2.4-2.6 V	This parameter displays the hybrid battery current sensor in volts as determined by the drive motor generator control module. This is a discreet input from the current sensor.
Hybrid Batt. Discharge Hrs.	Ahrs	Varies	This parameter displays the total accumulated amount of amp hours discharged from the hybrid batteries as determined by the drive motor generator control module. This information will be reset to 0 when the drive motor generator control module is reprogrammed or replaced.
Hybrid Batt. Discharge Power Available	Watts	29100 to 30000 Watts	This parameter displays the discharge power available in watts from the hybrid battery as determined by the drive motor generator control module power limit calculations.
Hybrid Batt. Inlet Air Temperature Sensor	V	3.2 V	This parameter displays the hybrid battery air inlet temperature, in volts, as measured by the drive motor generator control module. This sensor is located in the inlet side of the hybrid battery coolant cooler radiator.
Hybrid Batt. Max. Cell Temp.	°C (°F)	26°C (79°F)	This parameter displays the highest temperature value of all the hybrid battery modules temperature sensors as determined by the drive motor generator control module.
Hybrid Batt. Min. Cell Temp.	°C (°F)	24°C (75°F)	This parameter displays the lowest temperature value of all the hybrid battery module temperature sensors, as determined by the drive motor generator control module.
Hybrid Batt. Mod. 1 Temperature	°C (°F)	24°C (75°F)	This parameter displays the temperature of Hybrid Battery Module Temperature sensor 1 as measured by the drive motor generator control module, in °C (°F). The Hybrid Battery Module Temperature sensor 1 is located internal to the hybrid battery.
Hybrid Batt. Mod. 1 Temp. Sensor	V	3.2 V	This parameter displays the Hybrid Battery Module temperature sensor 1, measured in volts, as determined by the drive motor generator control module. The Hybrid Battery Module Temperature sensor 1 is located internal to the hybrid battery.
Hybrid Batt. Mod. 2 Temperature	°C (°F)	26°C (79°F)	This parameter displays the temperature of Hybrid Battery Module Temperature sensor 2 as measured by the drive motor generator control module, in °C (°F). The Hybrid Battery Module Temperature sensor 2 is located internal to the hybrid battery.
Hybrid Batt. Mod. 2 Temp. Sensor	V	3.2 V	This parameter displays the Hybrid Battery Module temperature sensor 2, measured in volts, as determined by the drive motor generator control module. The Hybrid Battery Module Temperature sensor 2 is located internal to the hybrid battery.
Hybrid Batt. Mod. 3 Temperature	°C (°F)	25°C (77°F)	This parameter displays the temperature of Hybrid Battery Module Temperature sensor 3 as measured by the drive motor generator control module, in °C (°F). The Hybrid Battery Module Temperature sensor 3 is located internal to the hybrid battery.
Hybrid Batt. Mod. 3 Temp. Sensor	V	3.2 V	This parameter displays the Hybrid Battery Module temperature sensor 3, measured in volts, as determined by the drive motor generator control module. The Hybrid Battery Module Temperature sensor 3 is located internal to the hybrid battery.
Hybrid Batt. Mod. 4 Temperature	°C (°F)	26°C (79°F)	This parameter displays the temperature of Hybrid Battery Module Temperature sensor 4, measured by the drive motor generator control module, in °C (°F). The Hybrid Battery Module Temperature sensor 4 is located internal to the hybrid battery.
Hybrid Batt. Mod. 4 Temp. Sensor	V	3.2 V	This parameter displays the Hybrid Battery Module temperature sensor 4, measured in volts, as determined by the drive motor generator control module. The Hybrid Battery Module Temperature sensor 4 is located internal to the hybrid battery.
Hybrid Batt. Pack Fan Commanded	%	0%	This parameter displays the duty cycle of the hybrid battery fan command in percent, as determined by the drive motor generator control module.
Hybrid Batt. Pack Resistance	Ohms	0.024 ohms	This parameter displays the impedance in ohms of the highest battery pair within the hybrid battery assembly, as measured by the drive motor generator control module.
Hybrid Battery 1 through 22	V	10-15 V	This parameter displays the voltage value of the individual the hybrid battery voltage measured by the drive motor generator control module.
Hybrid Batt. Inlet Air Temperature	°C (°F)	23°C (73°F)	This parameter displays the air inlet temperature, in °C (°F), internal to the hybrid battery, as measured by the drive motor generator control module. This sensor is located in the inlet duct for the hybrid battery coolant cooler radiator.
Hybrid Battery Pack Calculated	V	264-280 V	This parameter displays the total voltage of the hybrid battery assembly, as calculated by the drive motor generator control module by summing up all 22 hybrid battery voltage measurement values.
Hybrid Battery Pack Fan	RPM	21%	This parameter displays the speed of the hybrid battery fan in RPM, as measured by the drive motor generator control module.
Hybrid Battery SOC	%	70%	This parameter displays the calculated state of charge (SOC) of the hybrid battery as determined by the drive motor generator control module. This calculation incorporates many factors such as temperature, voltage and current.
Hybrid Battery Terminal	V	264-280 V	This parameter displays the total hybrid battery voltage as measured by the drive motor generator control module on the vehicle side of the High Voltage contactors. This measurement is only accurate when the both of the HV contactors are closed.
Max. Hybrid Batt. Module Voltage	V	15.8 V	This parameter displays the highest value in Volts of the 22 hybrid battery pair voltage measurement values, as determined by the drive motor generator control module.
Min. Hybrid Batt. Module Voltage	V	15.5 V	This parameter displays the lowest value in volts of the 22 hybrid battery module voltage measurement values, as determined by the drive motor generator control module.
Precharge Ckt Overtemperature	Yes/No	No	This parameter displays the status of the 300 V system. "Yes" indicates this is a reason the drive motor generator control module can not close the high voltage contactors. This is not an actual temperature measurement. This is a calculation made by the drive motor generator control module. "Yes" indicates that the drive motor generator control module has calculated that the precharge circuit may be hot and has started the precharge wait time counter.
Precharge Inhibited	Yes/No	No	This parameter displays information about contactor open reasons as determined by the drive motor generator control module. "Yes" indicates that the drive motor generator control module is disabling the precharge function.
Precharge Time Too long	Yes/No	No	This parameter displays the status of the 300 V system. "Yes" indicates this is a reason the drive motor generator control module can not close the high voltage contactors. The precharge time has taken too long. HV DC cables or circuits may be shorted causing higher current draws during the precharge process.
Precharge Time Too Short	Yes/No	No	This parameter displays the status of the 300 V system. "Yes" indicates this is a reason the drive motor generator control module can not close the high voltage contactors. The precharge time was to fast. High voltage DC cables/circuit may be open causing a fast precharge.
Precharge wait time	Seconds	0	This parameter displays the amount of time, in seconds, until the drive motor generator control module will allow a 300 V precharge sequence to occur. The drive motor generator control module can disable precharge in order to protect the precharge resistor and circuit from overheating.
Service Disconnect	Yes/No	No	This parameter displays information about contactor open reasons as determined by the drive motor generator control module. "Yes" indicates that the HV manual disconnect lever has been removed.

Scan Tool Output Controls

Output Control	Description
Battery Pack Fan Speed	The "Battery Pack Fan Speed" represents the RPM of the hybrid battery vent fan. The "Hybrid Batt Pack Fan Commanded" value represents the percent duty cycle which determines the speed of the battery fan once the "Battery Pack Fan Speed" Special function is enabled. The hybrid battery pack fan speed output control on the scan tool can command the hybrid battery fan speed to 20 percent, 40 percent, or 60 percent. The drive motor generator control module. receives a cooling fan request from serial data gateway module (SDGM). The drive motor generator control module then controls the hybrid battery vent fan using a pulse width modulated circuit. Under certain operating temperatures or failure conditions the drive motor generator control module, will run the fan. The duty cycle is represented by a percentage of ON energized time. The higher the percent the faster the fan speed. Approximately 70 percent duty cycle represents an "ON" and "High" fan speed. Approximately 20 percent duty cycle represents an "ON" and "low" fan speed. Zero percent represents an "OFF" non-energized commanded state. The Hybrid Battery Pack Fan RPM value on scan tool should increase when Hybrid Battery Pack Fan Commanded percent duty cycle is increased. When the output control is exited, the fan duty cycle is determined by the vehicle or the drive motor generator control module. The following control limits apply: If the hybrid battery temperature is determined to be over 52°C (126°F) and the battery pack is in cooling mode, the hybrid battery fan may not be commanded OFF. If the fan is requested OFF, the message "Hybrid battery temp is out of range" appears on the scan tool display. The hybrid battery pack fan may not be commanded ON if the RUN/Crank voltage is too low as detected by the drive motor generator control module. If the RUN/Crank voltage is too low as detected, the message "RUN/Crank voltage is too low" appears on the scan tool display. The hybrid battery pack fan may not be commanded On if the hybrid battery pack fan related DTCs are active. If hybrid battery pack fan related DTCs are active, the message "DTC present" appears on the scan tool display.
Pump Motor	The drive motor generator control module commands the coolant pump ON/OFF.
Negative Contactor	Hybrid battery "Negative Contactor" Special Function output control will allow the HV negative contactor to be closed by the drive motor generator control module, once the negative contactor output control is selected. The System will only allow the command of one contactor at a time. The high voltage manual disconnect must be removed. The high voltage contactors are opened and closed by the drive motor generator control module. The high voltage contactors are normally open. The control circuits for these contactors are high side drive. The drive motor generator control module supplies 12 volts to the control circuit in order to close the contactor. When the contactor is commanded CLOSED by using this special function, it will time out and open after approximately 15 seconds. When the output control is exited, the contactor is returned to the normally open position. You should be able to hear an audible click when the contactor open and closes. The following control limits apply: The high voltage manual disconnect lever must be removed. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV contactor is not OPEN when commanded CLOSED. When the drive motor generator control module detects that the HV contactor is not OPEN, "High voltage contactor state must be open" appears on the scan tool display. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV manual disconnect lever has not been removed. When the drive motor generator control module detects that the HV manual disconnect lever has not been removed, "High voltage manual disconnect must be removed" appears on the scan tool display.
Positive Contactor	Hybrid battery "Positive Contactor" Special Function output control will allow the HV positive contactor to be closed by the drive motor generator control module, once the positive contactor output control is selected. The System will only allow the command of one contactor at a time. The high voltage manual disconnect must be removed. The high voltage contactors are opened and closed by the drive motor generator control module. The high voltage contactors are normally open. The control circuits for these contactors are high side drive. The drive motor generator control module, supplies 12 volts to the control circuit in order to close the contactor. When the contactor is commanded CLOSED by using this special function, it will time out and open after approximately 15 seconds. When the output control is exited, the contactor is returned to the normally open position. You should be able to hear an audible click when the contactor open and closes. The following control limits apply: The high voltage manual disconnect lever must be removed. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV contactor is not OPEN when commanded CLOSED. When the drive motor generator control module detects that the HV contactor is not OPEN, "High voltage contactor state must be open" appears on the scan tool display. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV manual disconnect lever has not been removed. When the drive motor generator control module detects that the HV manual disconnect lever has not been removed, "High voltage manual disconnect must be removed" appears on the scan tool display.
Precharge Contactor	Hybrid battery "Precharge Contactor" Special Function output control will allow the HV precharge contactor, also known as the current limit relay, to be closed by the drive motor generator control module once the Precharge Contactor output control enable is selected. The System will only allow the command of one contactor relay at a time. The high voltage manual disconnect must be removed. The high voltage contactors are opened and closed by the drive motor generator control module. The high voltage contactors are normally open. The control circuits for these contactors are high side drive. The drive motor generator control module supplies 12 volts to the control circuit in order to close the contactor. When the precharge contactor, also known as the current limit relay, is commanded CLOSED by using this special function, it will time out and open after approximately 15 seconds. When the output control is exited, the contactor is returned to the normally open position. You should be able to hear an audible click when the contactor open and closes. The following control limits apply: The high voltage manual disconnect lever must be removed. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV contactor is not OPEN when commanded CLOSED. When the drive motor generator control module detects that the HV contactor relay is not OPEN, "High voltage contactor state must be open" appears on the scan tool display. The output control for HV contactor command will not work when the drive motor generator control module detects that the HV manual disconnect lever has not been removed. When the drive motor generator control module detects that the HV manual disconnect lever has not been removed, "High voltage manual disconnect must be removed" appears on the scan tool display.
300 V Isolation Test	This output control test is designed to run the hybrid battery Isolation test with the contactors closed while connected to the EL-48458 pre-charge tester. This will test the HV DC cables for electrical Isolation and the HV DC Precharge sequence for operation. for installation and removal procedure of the pre-charge tester, refer to High Voltage System Diagnosis (EL-48458) . The drive motor generator control module. receives a PWM contactor command duty cycle input from the HCP. The duty cycle is represented by a percentage of ON time. A 30 percent duty cycle represents a close contactor command or energized state. A 70 percent duty cycle represents an open contactor command. Before using this output control, the EL-48458 must be connected. Refer to High Voltage System Diagnosis (EL-48458) for pre-charge tester installation and removal procedures. Install the drive motor generator control module. EL-48458 pre-charge tester, Switch the ignition to the ON position, move the HV contactor switch on the EL-48458 pre-charge tester to the closed position, the drive motor generator control module, should then close the HV contactor relays. Verify that the high voltage circuit LED for Hi-voltage greater than 60 V illuminates and stays illuminated. On the scan tool select the special function output control for the 300 V Isolation test. The scan tool will then send a command to the drive motor generator control module, to run the isolation test and report the "isolation test resistance" results. When testing is complete, remove the EL-48458 , refer to High Voltage System Diagnosis (EL-48458) . The output control will not function unless the following conditions are met: When the high voltage manual disconnect is removed as determined by the drive motor generator control module. GMLAN communications between the HPCM and the drive motor generator control module. HVIC function disabled.