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.

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 Door Lockout Sw.: The scan tool displays Unlock/Lock. This is state of the driver door lockout switch as detected by the driver door switch assembly (DDSA). The DDSA reports this status to the driver door module via the power door serial data circuit. When the lockout function is activated, the scan tool displays Lock and the passenger door windows programmed for lockout will operate only from the drivers door window switches. When the lockout function is deactivated, the scan tool displays Unlock and all passenger door windows can then be operated from their locally mounted window switches, as well as from the drivers door window switches.

Driver LF Window Sw.: The scan tool displays Idle/Up/Down/Express Down. 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. This is the state of the driver 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 RF Window Sw.: The scan tool displays Idle/Up/Down. This is the state of the driver 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. This is the state of the driver 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 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 left or right direction, the scan tool displays the corresponding direction. When the driver door module is not commanding the driver door mirror 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. 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/Right/Left. This is the state of the mirror switch as detected by the driver door switch assembly (DDSA). The DDSA reports this switch status to the driver door module via the power door serial data circuit. When the mirror switch is operated in the Up, Down, Right, or Left directions, the scan tool displays the corresponding direction. When the mirror switch is not being operated, the scan tool displays Idle.

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

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

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 varies directly with the horizontal position of the driver outside rearview mirror.

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 varies directly with the vertical position of the driver outside rearview mirror.

Lt. Rear Dome/Buzzer Sw.: 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.

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

Memory Recall Switches: The scan tool displays Idle/Memory 1/Memory 2/Exit. When the memory function switch is operated, the scan tool displays the function selected.

Pass. Dome/Buzzer 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 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 Cylinder Sw.: The scan tool displays Idle/Unlock. This is the state of the passenger front door lock cylinder switch as detected by the passenger front door module. When the door key is inserted into the passenger front door lock cylinder and turned to the Unlock position, the scan tool displays Unlock. When the passenger front door lock cylinder is not being turned to the Unlock position, the scan tool displays Idle.

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 motor to move the window up, the scan tool displays Up. When the passenger front door module commands the passenger front door window motor to move the window down, the scan tool displays Down. When the passenger front door module is not commanding the passenger front door window motor to move the window in either direction, the scan tool displays Idle.

Pass. Door Window Sw.: The scan tool displays Idle/Up/Down. 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 front 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 front door mirror horizontal motor to move the mirror in either the left or right direction, the scan tool displays the corresponding direction. When the passenger front door module is not commanding the mirror to move in any direction, the scan tool displays Idle.

PROM: The scan tool displays the 4-digit number of the PROM incorporated into the driver door module (DDM).

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

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 varies directly with the horizontal position of the passenger outside rearview mirror.

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 varies directly with the vertical position of the passenger outside rearview mirror.

Rt. Rear Dome/Buzzer Sw.: 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.

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

Serial Number: The scan tool displays the module serial number.

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