GM Service Manual Online
For 1990-2009 cars only

Engine Control Module (ECM) Hybrid

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Hood Open

12V Batt. Current

Engine Control Module, Data Display, Hybrid Data, Data Display

Amps

0 amps

12V Batt. Est. Temp.

Engine Control Module, Data Display, Hybrid Data, Data Display

Celsius/Fahrenheit

82 degrees F

APM Control Mode

Engine Control Module, Data Display, Hybrid Data, Data Display

Off, High to Low, Low to High, Not Used

Off

APM Control Status

Engine Control Module, Data Display, Hybrid Data, Data Display

Charging, Current Limited, Shutdown, Not Used

Normal Change

APM Voltage

Engine Control Module, Data Display, Hybrid Data, Data Display

Volts

12 volts

Aux. Trans Fluid Pump Command

Engine Control Module, Data Display, Hybrid Data, Data Display

Percent

0 percent

Calc Hybrid Batt Resistance

Engine Control Module, Data Display, Hybrid Data, Data Display

Ohms

0 ohms

Calc Starter Gen Torque

Engine Control Module, Data Display, Hybrid Data, Data Display

N·m

8.9 N·m

Contactor Open Reason

Engine Control Module, Data Display, Hybrid Data, Data Display

None, SDM Command, Service Discon., ECM Discon., Hybrid Batt Tem, Fault

None

Desired APM Voltage

Engine Control Module, Data Display, Hybrid Data, Data Display

Volts

14 volts

Desired Hybrid Batt. SOC

Engine Control Module, Data Display, Hybrid Data, Data Display

Percent

69 percent

Desired Starter Gen Torque

Engine Control Module, Data Display, Hybrid Data, Data Display

N·m

12 N·m

ECM Des. Contactor Position

Engine Control Module, Data Display, Hybrid Data, Data Display

Closed, Open

Closed

Economy Lamp Command

Engine Control Module, Data Display, Hybrid Data, Data Display

On/Off

Off

Eng Auto Start Reason

Engine Control Module, Data Display, Hybrid Data, Data Display

None, BPP, APP, Trans Range Tim, Auto Stop Time, Hybrid Batt Stat, Aux TFP Pump, Coast Speed Low, Coast Speed High, BBC Low, Coast Speed Inc, 12V Batt Hi Amp, 12V Batt Lo Amp, Fault, ECT Low, Device Control, A/C Request, ECT High, Engine Control

None

Hill Hold Lamp Command

Engine Control Module, Data Display, Hybrid Data, Data Display

On/Off

Off

Hood Open Indicator Command

Engine Control Module, Data Display, Hybrid Data, Data Display

On/Off

On

Hood Position Status

Engine Control Module, Data Display, Hybrid Data, Data Display

Closed/Ajar/Open

Open

Hybrid Batt Avg Cell Temp.

Engine Control Module, Data Display, Hybrid Data, Data Display

Celsius/Fahrenheit

73 degrees F

Hybrid Batt Max Cell Temp.

Engine Control Module, Data Display, Hybrid Data, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Batt Min Cell Temp.

Engine Control Module, Data Display, Hybrid Data, Data Display

Celsius/Fahrenheit

73 degrees F

Hybrid Batt Power Available

Engine Control Module, Data Display, Hybrid Data, Data Display

Watts

13,616.0 watts

Hybrid Battery Current

Engine Control Module, Data Display, Hybrid Data, Data Display

Amps

0.0 amps

Hybrid Battery SOC

Engine Control Module, Data Display, Hybrid Data, Data Display

Percent

60 percent

Hybrid Battery Voltage

Engine Control Module, Data Display, Hybrid Data, Data Display

Volts

39.67 volts

Ignition 1 Signal

Engine Control Module, Data Display, Hybrid Data, Data Display

Volts

12 volts

SGCM Coolant Pump Relay Command

Engine Control Module, Data Display, Hybrid Data, Data Display

Off/On

Off

SGCM Des. Contactor Position

Engine Control Module, Data Display, Hybrid Data, Data Display

Closed/Open

Closed

SGCM Temperature

Engine Control Module, Data Display, Hybrid Data, Data Display

Celsius/Fahrenheit

75 degrees F

Starter Gen. Belt Slip

Engine Control Module, Data Display, Hybrid Data, Data Display

Percent

Varies

Starter Generator Mode

Engine Control Module, Data Display, Hybrid Data, Data Display

Key Off, Auto Stop, Starter GEN, 12V Starter, CKP Indexing, Key Crank Active, Auto Start, Transition, Charging, Discharging, Regen Braking, Spin Dwn Control

Varies

Starter Generator Speed

Engine Control Module, Data Display, Hybrid Data, Data Display

RPM

0 RPM

Starter/Generator Control Module (SGCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Hood Open

APM Control Mode

Starter/Generator Control Module, SGCM Data Display, Data Display

Off, High to Low, Low to High, Not Used

Off

APM Control Status

Starter/Generator Control Module, SGCM Data Display, Data Display

Charging, Current Limited, Shutdown, Not Used

Charging

Desired APM Voltage

Starter/Generator Control Module, SGCM Data Display, Data Display

Volts

12.07 volts

Generator Starter Field Circuit

Starter/Generator Control Module, SGCM Data Display, Data Display

Disable, Enable

Enable

Generator Starter Field Current

Starter/Generator Control Module, SGCM Data Display, Data Display

Amps

0.0 amps

Hood Position

Starter/Generator Control Module, SGCM Data Display, Data Display

Open/Closed

Open

Hybrid System Voltage

Starter/Generator Control Module, SGCM Data Display, Data Display

Volts

39.7 volts

SGCM 12 volt Converter

Starter/Generator Control Module, SGCM Data Display, Data Display

Amps

Varies

SGCM 12 volt Converter

Starter/Generator Control Module, SGCM Data Display, Data Display

Volts

Varies

SGCM Internal Temperature

Starter/Generator Control Module, SGCM Data Display, Data Display

Celsius/Fahrenheit

84 degrees F

SGCM Inverter Temperature

Starter/Generator Control Module, SGCM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Starter Generator Speed

Starter/Generator Control Module, SGCM Data Display, Data Display

RPM

0 RPM

Starter Generator Temperature

Starter/Generator Control Module, SGCM Data Display, Data Display

Celsius/Fahrenheit

77 degrees F

Battery Energy Control Module (BECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Hood Open

ECM Des.Contactor Position

Battery Energy Control Module, BECM Data Display, Data Display

Closed, Open Impact DTC, Open Service Dis, ECM Fault, Overtemp, Fault

Closed

Hybrid Batt. High Current Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

3.3 volts

Hybrid Bat. High Current Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Amps

0.0 amps

Hybrid Batt. Low Current Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

2.5 volts

Hybrid Batt. Low Current Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Amps

0.0 amps

Hybrid Battery 1 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 2 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 3 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 4 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 5 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 6 Temperature

Battery Energy Control Module, BECM Data Display, Data Display

Celsius/Fahrenheit

75 degrees F

Hybrid Battery 1 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 2 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 3 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 4 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 5 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 6 Temperature Sensor

Battery Energy Control Module, BECM Data Display, Data Display

Volts

1.9 volts

Hybrid Battery 1

Battery Energy Control Module, BECM Data Display, Data Display

Volts

13.2 volts

Hybrid Battery 2

Battery Energy Control Module, BECM Data Display, Data Display

Volts

13.2 volts

Hybrid Battery 3

Battery Energy Control Module, BECM Data Display, Data Display

Volts

13.2 volts

Hybrid Battery Current

Battery Energy Control Module, BECM Data Display, Data Display

Zero Range, DC/AC Polarity, High/Low Sensor

Zero Range

Hybrid Batt. Pack Fan Commanded

Battery Energy Control Module, BECM Data Display, Data Display

Percent

0 percent

Hybrid Battery Pack Fan

Battery Energy Control Module, BECM Data Display, Data Display

RPM

0 RPM

Hybrid System Voltage

Battery Energy Control Module, BECM Data Display, Data Display

Volts

39.6 volts

SGCM 12 Volt Converter

Battery Energy Control Module, BECM Data Display, Data Display

Amps

0.0 amps