| Table 1: | Scan Tool Data Parameters |
| Table 2: | Scan Tool Output Controls |
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.
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. | |||
300V Isolation Test Conditions Met | Yes/No | No | This parameter displays the status of the high voltage (HV) system as determined by the battery energy control module (BECM). This parameter indicates if the isolation test will run at the next High voltage power down cycle. Should display "Yes" after the ignition key is cycled to "Off" and before the isolation test runs. |
300V Isolation Test Status | Not Run/In Progress/Passed/Failed | Passed or In Progress | This parameter displays the status of the "300V Isolation Test" diagnostic after running during normal vehicle operation or after running the special functions device control located under the battery energy control module (BECM) 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 battery energy control module (BECM). "Yes" indicates that an airbag deployment or high voltage circuit impact detection (HVCID) sensor activation has occurred. |
Calc. Hybrid Batt. Current | amps | -2.0 to +2.0 amps | This parameter displays the hybrid battery current as determined by the battery energy control module (BECM). This is a discreet input to the BECM from the current sensor located in the drive motor generator battery. The BECM 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 battery energy control module (BECM). The BECM uses all 20 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 battery energy control module (BECM). "Yes" indicates that the BECM 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 battery energy control module (BECM) over GM Lan for the hybrid battery contactor relay control as determined by the BECM. 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 battery energy control module (BECM). |
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 battery energy control module (BECM). The status can be displayed as open, closed, precharging, precharge failed or precharge inhibit. |
Control Module Voltage | Yes/No | No | This parameter displays information about contactor open reasons as determined by the battery energy control module (BECM). "Yes" indicates that control module voltage supply is high. |
Control Module Voltage | Volts | 13.7-14.5 volts | This parameter displays the value of the input voltage used to power up the battery energy control module (BECM), as measured by the BECM. |
Current Sen. High Range | Amps | +2.0 to -2.0 | The hybrid battery current sensor has 3 measurements ranges. This parameter displays the hybrid battery current sensor high range value in Amps as determined by the battery energy control module (BECM). The high range current sensor displays a value between -250 and +250 amps. |
Current Sen. Low Range | Amps | +2.0 to -2.0 | The hybrid battery current sensor has 3 measurements ranges. This parameter displays the hybrid battery current sensor low range value in Amps as determined by the battery energy control module (BECM). The low range current sensor displays a value between -22 and +22 amps. If current levels exceed this range, the value will be saturated at -22 or +22 amps. |
Current Sen. Medium Range | Amps | +2.0 to -2.0 | The hybrid battery current sensor has 3 measurements ranges. This parameter displays the hybrid battery current sensor medium range value in Amps as determined by the battery energy control module (BECM). The medium range current sensor displays a value between -52 and +52 amps. If current levels exceed this range, the value will be saturated at -52 or +52 amps. |
HVIC Fault | Yes/No | No | This parameter displays information about contactor open reasons as determined by the battery energy control module (BECM). "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 battery energy control module (BECM) for high voltage interlock circuit detection as determined by the BECM. |
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 battery energy control module (BECM). |
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 battery energy control module (BECM). This information will be reset to 0 when the BECM is reprogrammed or replaced. |
Hybrid Batt. Charge Pwr Available | Watts | 29100 to 30000 | This parameter displays the charge power available in watts from the hybrid battery as determined by the battery energy control module (BECM) power limit calculation. |
Hybrid Batt. Current Sensor | Volts | 2.4-2.6 volts | This parameter displays the hybrid battery current sensor in volts as determined by the battery energy control module (BECM). 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 battery energy control module (BECM). This information will be reset to 0 when the BECM is reprogrammed or replaced. |
Hybrid Batt. Discharge Power Available | Watts | 29100 to 30000 | This parameter displays the discharge power available in watts from the hybrid battery as determined by the battery energy control module (BECM) power limit calculations. |
Hybrid Batt. Inlet Air Temperature Sensor | Volts | 3.2 volts | This parameter displays the hybrid battery air inlet temperature, in volts, as measured by the battery energy control module (BECM). This sensor is located in the inlet duct for the hybrid battery cooling fan. |
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 battery energy control module (BECM). |
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 battery energy control module (BECM). |
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 battery energy control module (BECM), in °C (°F). The Hybrid Battery Module Temperature sensor 1 is located internal to the hybrid battery and located on hybrid battery number 1. |
Hybrid Batt. Mod. 1 Temp. Sensor | Volts | 3.2 volts | This parameter displays the Hybrid Battery Module temperature sensor 1, measured in volts, as determined by the battery energy control module (BECM). The Hybrid Battery Module Temperature sensor 1 is located internal to the hybrid battery and located on hybrid battery number 1. |
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 battery energy control module (BECM), in °C (°F). The Hybrid Battery Module Temperature sensor 2 is located internal to the hybrid battery and located on hybrid battery number 14. |
Hybrid Batt. Mod. 2 Temp. Sensor | Volts | 3.2 volts | This parameter displays the Hybrid Battery Module temperature sensor 2, measured in volts, as determined by the battery energy control module (BECM). The Hybrid Battery Module Temperature sensor 2 is located internal to the hybrid battery and located on hybrid battery number 14. |
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 battery energy control module (BECM), in °C (°F). The Hybrid Battery Module Temperature sensor 3 is located internal to the hybrid battery and located on hybrid battery number 27. |
Hybrid Batt. Mod. 3 Temp. Sensor | Volts | 3.2 volts | This parameter displays the Hybrid Battery Module temperature sensor 3, measured in volts, as determined by the battery energy control module (BECM). The Hybrid Battery Module Temperature sensor 3 is located internal to the hybrid battery and located on hybrid battery number 27. |
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 battery energy control module (BECM), in °C (°F). The Hybrid Battery Module Temperature sensor 4 is located internal to the hybrid battery and located on hybrid battery number 40. |
Hybrid Batt. Mod. 4 Temp. Sensor | Volts | 3.2 volts | This parameter displays the Hybrid Battery Module temperature sensor 4, measured in volts, as determined by the battery energy control module (BECM). The Hybrid Battery Module Temperature sensor 4 is located internal to the hybrid battery and located on hybrid battery number 40. |
Hybrid Batt. Outlet Air Temperature | °C (°F) | 25°C (77°F) | This parameter displays the hybrid battery air outlet temperature value, in °C (°F), as measured by the battery energy control module (BECM). This sensor is clipped to the upper tension rod and is located above hybrid battery 3. |
Hybrid Batt. Outlet Air Temperature Sensor | Volts | 3.2 volts | This parameter displays the hybrid battery air outlet temperature value, in volts, of the hybrid battery, as measured by the battery energy control module (BECM). This sensor is clipped to the upper tension rod and is located above hybrid battery 3. |
Hybrid Batt. Pack Fan Commanded | % | 0 | This parameter displays the duty cycle of the hybrid battery fan command in percent, as determined by the battery energy control module (BECM). |
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 battery energy control module (BECM). |
Hybrid Battery 1 through 10 | Volts | 15.5 volts | This parameter displays the voltage value of hybrid battery voltage measurements #1-10 of the hybrid battery assembly, as measured by the battery energy control module (BECM). There are 40 hybrid batteries, measured at 20 locations. Each voltage parameter represents the sum of a pair of hybrid batteries. |
Hybrid Battery 11 | Volts | 15.6 volts | This parameter displays the voltage value of the hybrid battery voltage measurement #11 of the hybrid battery assembly, as measured by the battery energy control module (BECM). This voltage parameter represents the sum of a pair of hybrid batteries. If the manual disconnect lever is removed, the parameter for #11 will display 0 volts. |
Hybrid Battery 12 through 20 | Volts | 15.6 volts | This parameter displays the voltage value of the hybrid battery voltage measurements #12-20 of the hybrid battery assembly, as measured by the battery energy control module (BECM). There are 40 hybrid batteries, measured at 20 locations. Each voltage parameter represents the sum of a pair of hybrid batteries. |
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 battery energy control module (BECM). This sensor is located in the inlet duct for the hybrid battery cooling fan. |
Hybrid Battery Pack Calculated | Volts | 331 volts | This parameter displays the total voltage of the hybrid battery assembly, as calculated by the battery energy control module (BECM) by summing up all 20 hybrid battery voltage measurement values. |
Hybrid Battery Pack Fan | RPM | 0=off 1375=low | This parameter displays the speed of the hybrid battery fan in RPM, as measured by the battery energy control module (BECM). |
Hybrid Battery SOC | % | 70 | This parameter displays the calculated state of charge (SOC) of the hybrid battery as determined by the battery energy control module (BECM). This calculation incorporates many factors such as temperature, voltage and current. |
Hybrid Battery Terminal | Volts | 330 volts | This parameter displays the total hybrid battery voltage as measured by the battery energy control module (BECM) on the vehicle side of the High Voltage contactor relays. This measurement is only accurate when the both of the HV contactor relays are closed |
Max. Hybrid Batt. Module Voltage | Volts | 15.6 volts | This parameter displays the highest value in Volts of the 20 hybrid battery pair voltage measurement values, as determined by the battery energy control module (BECM). |
Min. Hybrid Batt. Module Voltage | Volts | 15.5 volts | This parameter displays the lowest value in volts of the 20 hybrid battery module voltage measurement values, as determined by the battery energy control module (BECM). |
Precharge Ckt Overtemperature | Yes/No | No | This parameter displays the status of the 300V system. "Yes" indicates this is a reason the battery energy control module (BECM) can not close the high voltage contactors. This is not an actual temperature measurement. This is a calculation made by the BECM. "Yes" indicates that the BECM 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 battery energy control module (BECM). "Yes" indicates that the BECM is disabling the precharge function. |
Precharge Time Too long | Yes/No | No | This parameter displays the status of the 300V system. "Yes" indicates this is a reason the battery energy control module (BECM) 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 300V system. "Yes" indicates this is a reason the battery energy control module (BECM) 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 battery energy control module (BECM) will allow a 300V precharge sequence to occur. The BECM 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 battery energy control module (BECM). "Yes" indicates that the HV manual disconnect lever has been removed. |
Output Control | Description | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Battery Pack Fan Speed |
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Negative Contactor |
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Positive Contactor |
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Precharge Contactor |
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300V Isolation Test |
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