GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Control Module (ECM) Hybrid
Table 2: Starter/Generator Control Module (SGCM)
Table 3: Battery Energy Control Module (BECM)

Engine Control Module (ECM) Hybrid

Scan Tool Output Control

Additional Menu Selection(s)

Description

APM Mode High to Low

Engine Control Module, Special Functions, Hybrid Outputs

36V DC to 12V DC

APM Set Point Control

Engine Control Module, Special Functions, Hybrid Outputs

Adjusts 12Volt Converter set point from 0 to 16 volts.

Auto Start/Stop Command

Engine Control Module, Special Functions, Hybrid Outputs

Commands Auto Start/Auto Stop

AUX. Trans. Pump

Engine Control Module, Special Functions, Hybrid Outputs

Commands the AUX. Transmission pump ON/OFF.

Batt End of Life Est Reset

Engine Control Module, Special Functions, Hybrid Outputs

Reset Battery life to 100 percent

Brake Pres. Sensor 2 Learn

Engine Control Module, Special Functions, Hybrid Outputs

Calibrates the brake pressure 2 sensor

Charge/Assist Gauge

Engine Control Module, Special Functions, Hybrid Outputs

Drives the gauge from minimum to maximum

Contactor Control

Engine Control Module, Special Functions, Hybrid Outputs

Commands the Hybrid Battery Contactor OPEN/CLOSED

Economy Mode Indicator

Engine Control Module, Special Functions, Hybrid Outputs

The scan tool commands the indicator ON/OFF.

Engine Clnt. Pump Relay

Engine Control Module, Special Functions, Hybrid Outputs

Command the Aux. Coolant ON/OFF

Hill Hold Indicator

Engine Control Module, Special Functions, Hybrid Outputs

The scan tool commands the indicator ON/OFF.

Hood Ajar Indicator

Engine Control Module, Special Functions, Hybrid Outputs

The scan tool commands the indicator ON/OFF.

Hybrid Batt Charge Hrs

Engine Control Module, Special Functions, Hybrid Outputs

Resets Charged AMP hours with new battery.

Hybrid Batt Discharge Amp Hrs

Engine Control Module, Special Functions, Hybrid Outputs

Resets Discharged AMP hours with new battery.

Hybrid Batt SOC Low

Engine Control Module, Special Functions, Hybrid Outputs

Override SOC set point to 0 percent

Hybrid Batt SOC High

Engine Control Module, Special Functions, Hybrid Outputs

Override SOC set point to 100 percent

Hybrid Disable

Engine Control Module, Special Functions, Hybrid Outputs

Disables/Enables Hybrid Function.

SGCM Coolant Pump

Engine Control Module, Special Functions, Hybrid Outputs

Commands the SGCM coolant pump ON/OFF.

Starter Enable

Engine Control Module, Special Functions, Hybrid Outputs

Cranks Engine with Starter/Generator

Starter/Generator Control Module (SGCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Brake Hold Sol. 1

Starter/Generator Control Module, Special Functions

Commands the Brake Hold Solenoid 1 ON/OFF.

Brake Hold Sol. 2

Starter/Generator Control Module, Special Functions

Commands the Brake Hold Solenoid 2 ON/OFF.

SGCM Field Current

Starter/Generator Control Module, Special Functions

Commands the Starter/Generator Field Current ON/OFF.

Battery Energy Control Module (BECM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Battery Pack Fan Speed

Battery Energy Control Module, Special Functions

Commands the Battery Pack Fan ON/OFF