GM Service Manual Online
For 1990-2009 cars only
8 Digit GM Part Number: The scan tool displays the part number for the driver door module (DDM).

Batt. Voltage: The scan tool displays 9.0-15.0 volts. This is the current battery voltage.

Calibration ID: The scan tool displays the calibration or program revision level used in the PROM.

Component Serial #: The scan tool displays the first partition of the serial number.

Component Serial #: The scan tool displays the second partition of the serial number.

Component Serial #: The scan tool displays the third partition of the serial number.

Component Serial #: The scan tool displays the last partition of the serial number.

Driver Dome/Buzzer Sw.: The scan tool displays Off/On. This is the state of the driver door dome/buzzer switch as detected by the driver door module. When the driver door is open, the switch closes and the scan tool displays On. When the driver door is closed, the switch opens and the scan tool displays Off.

Driver Door Ajar Sw.: The scan tool displays Off/On. This is the state of the driver door ajar switch as detected by the driver door module. When the driver door is open, the switch closes and the scan tool displays On. When the driver door is closed, the switch opens and the scan tool displays Off.

Driver Door Cylinder Sw.: The scan tool displays Idle/Unlock. This is the state of the driver door lock cylinder switch as detected by the driver door module. When the door key is inserted into the driver door lock cylinder and turned to the unlock position, the scan tool displays Unlock. When the driver door lock cylinder is not being turned to the unlock position, the scan tool displays Idle.

Driver Door Lock Output: The scan tool displays Idle/Lock/Unlock. When the driver door module commands the driver door lock actuator to lock, the scan tool displays Lock. When the driver door module commands the driver door lock actuator to unlock, the scan tool displays Unlock. When the driver door module is not commanding the driver door lock actuator to, either lock or unlock, the scan tool displays Idle.

Driver Door Lock Sw.: The scan tool displays Idle/Lock/Unlock. This is the state of the driver door lock switch as detected by the driver door switch assembly (DDSA). The DDSA sends this switch status to the driver door module via the power door serial data circuit.

Driver LF Window Sw.: The scan tool displays Idle/Up/Down/Express Down/Express Up. This is the state of the driver door window switch as detected by the driver door switch assembly (DDSA). The DDSA sends this switch status to the driver door module via the power door serial data circuit.

Driver LR Window Sw.: The scan tool displays Idle/Up/Down/Express Down. This is the state of the drivers left rear window switch as detected by the driver door switch assembly (DDSA). The DDSA sends this switch status to the driver door module via the power door serial data circuit.

Driver Mirror Outputs: The scan tool displays Idle/Up/Down/Left/Right. When the driver door module commands the driver door mirror vertical motor to move the mirror in either the Up or Down direction, the scan tool displays the corresponding direction. When the driver door module commands the driver door mirror horizontal motor to move the mirror in either the Right or Left direction, the scan tool displays the corresponding direction. When the driver door module is not commanding the driver door mirror motors to move in any direction, the scan tool displays Idle.

Driver Mirror Selectors: The scan tool displays Driver/Off/Passenger. This indicates which mirror, if any, the operator has selected for adjustment. If neither mirror is selected, the scan tool displays Off. The driver door switch assembly (DDSA) detects the position of this switch and sends the information to the driver door module via the power door serial data circuit.

Driver Mirror Switches: The scan tool displays Idle/Up/Down/Left/Right/Left-Up/Left-Down/Right-Up/Right-Down/Fold-(w/ Export vehicles). This is the state of the mirror position switch or the mirror fold switch as detected by the driver door switch assembly (DDSA). When the mirror position switch is operated in any direction, the scan tool displays the corresponding direction. When the mirror fold switch is activated to, either retract the mirrors in, or, extend the mirrors out, the scan tool displays Fold. When neither switch is being operated, the scan tool displays Idle. The DDSA sends the status of both switches to the driver door module via the power door serial data circuit.

Driver RF Window Sw.: The scan tool displays Idle/Up/Down/Express Down/Express Up. This is the state of the drivers right front window switch as detected by the driver door switch assembly (DDSA). The DDSA sends this switch status to the driver door module via the power door serial data circuit.

Driver RR Window Sw.: The scan tool displays Idle/Up/Down/Express Down. This is the state of the drivers right rear window switch as detected by the driver door switch assembly (DDSA). The DDSA sends this switch status to the driver door module via the power door serial data circuit.

Driver Window Output: The scan tool displays Idle/Up/Down. When the driver door module commands the driver door window to move up, the scan tool displays UP. When the driver door module commands the driver door window to move down, the scan tool displays Down. When the driver door module is not commanding the driver door window to move in either direction, the scan tool displays Idle.

Julian Date Of Build: The scan tool displays the day of the year the module was built

LH Drvr Personalization: This is the state of the personalization option for a domestic vehicle as it is stored in the Dash integration Module (DIM). When LH Drvr Personalization is selected, the scan tool displays the directions to activate or deactivate the personalization options. An asterisk displayed beside the option indicates that the option is activated. The personalization option is normally set to the activated state for domestic vehicles during assembly of the vehicle.

LR Dome/Buzzer Switch: The scan tool displays Off/On. This is the state of the left rear door dome/buzzer switch as detected by the left rear door module. When the left rear door is open, the switch closes and the scan tool displays On. When the left rear door is closed, the switch opens and the scan tool displays Off.

LR Door Lock Output: The scan tool displays Idle/Lock/Unlock. When the left rear door module commands the left rear door lock actuator to lock, the scan tool displays Lock. When the left rear door module commands the left rear door lock actuator to unlock, the scan tool displays Unlock. When the left rear door module is not commanding the left rear door lock actuator to, either lock or unlock, the scan tool displays Idle.

LR Door Lock Switch: The scan tool displays Idle/Lock. This is the state of the left rear door lock switch as detected by the left rear door module. The left rear door lock switch has no circuitry for the unlock function.

LR Door Window Output: The scan tool displays Idle/Up/Down. When the left rear door module commands the left rear door window to move up, the scan tool displays UP. When the left rear door module commands the left rear door window to move down, the scan tool displays Down. When the left rear door module is not commanding the left rear door window to move in either direction, the scan tool displays Idle.

Left Rear Door Ajar Sw.: The scan tool displays Off/On. This is the state of the left rear door ajar switch as detected by the left rear door module. When the left rear door is open, the switch closes and the scan tool displays On. When the left rear door is closed, the switch opens and the scan tool displays Off.

Lt. Horiz. Mirror Pos.: The scan tool displays 0.25-4.75 volts. This is the mirror horizontal position sensor feedback voltage to the driver door module. The voltage displayed varies directly with the horizontal position of the driver outside rearview mirror.

Lt. Rear Door Window Sw.: The scan tool displays Idle/Up/Down/Express Down. This is the state of the left rear door window switch as detected by the left rear door module.

Lt. Vertical Mirror Pos.: The scan tool displays 0.25-4.75 volts. This is the mirror vertical position sensor feedback voltage to the driver door module. The voltage displayed varies directly with the vertical position of the driver outside rearview mirror.

Memory Recall Switches: The scan tool displays Idle/Memory 1/Memory 2/Exit. This is the memory function currently being recalled.

Pass. Dome/Buzzer Sw.: The scan tool displays Off/On. This is the state of the passenger front door dome/buzzer switch as detected by the passenger front door module. When the passenger front door is open, the switch closes and the scan tool displays On. When the passenger front door is closed, the switch opens and the scan tool displays Off.

Pass. Door Ajar Sw.: The scan tool displays Off/On. This is the state of the passenger front door ajar switch as detected by the passenger front door module. When the passenger front door is open, the switch closes and the scan tool displays On. When the passenger front door is closed, the switch opens and the scan tool displays Off.

Pass. Door Lock Output: The scan tool displays Idle/Lock/Unlock. When the passenger front door module commands the passenger front door lock actuator to lock, the scan tool displays Lock. When the passenger front door module commands the passenger front door lock actuator to unlock, the scan tool displays Unlock. When the passenger front door module is not commanding the passenger front door lock actuator to, either lock or unlock, the scan tool displays Idle.

Pass. Door Lock Sw.: The scan tool displays Idle/Lock/Unlock. This is the state of the passenger front door lock switch as detected by the passenger front door module.

Pass. Door Window Output: The scan tool displays Idle/Up/Down. When the passenger front door module commands the passenger front door window to move up, the scan tool displays UP. When the passenger front door module commands the passenger front door window to move down, the scan tool displays Down. When the passenger front door module is not commanding the passenger front door window to move in either direction, the scan tool displays Idle.

Pass. Door Window Sw.: The scan tool displays Idle/Up/Down/Express Down/Express Up. This is the state of the passenger front door window switch as detected by the passenger front door module.

Passenger Mirror Output: The scan tool displays Idle/Up/Down/Left/Right. When the passenger front door module commands the passenger door mirror vertical motor to move the mirror in either the Up or Down direction, the scan tool displays the corresponding direction. When the passenger front door module commands the passenger door mirror horizontal motor to move the mirror in either the Right or Left direction, the scan tool displays the corresponding direction. When the passenger front door module is not commanding the passenger door mirror motors to move in any direction, the scan tool displays Idle.

PROM: The scan tool displays the four digit number of the PROM incorporated into the Driver Door Module (DDM).

RH Drvr Personalization: This is the state of the personalization option for a export vehicle as it is stored in the Dash integration Module (DIM). When RH Drvr Personalization is selected, the scan tool displays the directions to activate or deactivate the personalization options. An asterisk displayed beside the option indicates that the option is activated. The personalization option is normally set to the activated state for export vehicles during assembly of the vehicle.

RR Dome/Buzzer Switch: The scan tool displays Off/On. This is the state of the right rear door dome/buzzer switch as detected by the right rear door module. When the right rear door is open, the switch closes and the scan tool displays On. When the right rear door is closed, the switch opens and the scan tool displays Off.

RR Door Lock Output: The scan tool displays Idle/Lock/Unlock. When the right rear door module commands the right rear door lock actuator to lock, the scan tool displays Lock. When the right rear door module commands the right rear door lock actuator to unlock, the scan tool displays Unlock. When the right rear door module is not commanding the right rear door lock actuator to, either lock or unlock, the scan tool displays Idle.

RR Door Lock Switch: The scan tool displays Idle/Lock. This is the state of the right rear door lock switch as detected by the right rear door module. The right rear door lock switch has no circuitry for the unlock function.

RR Door Window Output: The scan tool displays Idle/Up/Down. When the right rear door module commands the right rear door window to move up, the scan tool displays UP. When the right rear door module commands the right rear door window to move down, the scan tool displays Down. When the right rear door module is not commanding the right rear door window to move in either direction, the scan tool displays Idle.

Right Rear Door Ajar Sw.: The scan tool displays Off/On. This is the state of the right rear door ajar switch as detected by the right rear door module. When the right rear door is open, the switch closes and the scan tool displays On. When the right rear door is closed, the switch opens and the scan tool displays Off.

Rt. Horiz. Mirror Pos.: The scan tool displays 0.25-4.75 volts. This is the mirror horizontal position sensor feedback voltage to the passenger front door module. The voltage displayed varies directly with the horizontal position of the passenger outside rearview mirror.

Rt. Rear Door Window Sw.: The scan tool displays Idle/Up/Down/Express Down. This is the state of the right rear door window switch as detected by the right rear door module.

Rt. Vertical Mirror Pos.: The scan tool displays 0.25-4.75 volts. This is the mirror vertical position sensor feedback voltage to the passenger front door module. The voltage displayed varies directly with the vertical position of the passenger outside rearview mirror.

Window Lockout Sw.: The scan tool displays Idle/Active. This is the state of the lockout switch as detected by the driver door switch assembly (DDSA). The DDSA reports the switch activity to the driver door module (DDM). When the window lockout switch button is pressed, the scan tool will display Active. When the window lockout switch button is not pressed, the scan tool will display Idle. When the window lockout function is activated, the LED on the window lockout switch button will be illuminated and the rear door windows will operate only from the corresponding drivers door window switches. When the window lockout function is deactivated, the LED on the window lockout switch button will not be illuminated and the rear door windows can then be operated from their locally mounted switches, as well as from the drivers door window switches.

Year Module Built: The scan tool displays the four digit year of build.