GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Instrument Panel Module (IPM)

Operating Conditions: Ignition ON, Engine OFF

Steering Wheel Controls Return

Inputs

Counts

Varies

Battery Voltage Signal

Load Management

Volts

12.5

Accessory Relay Status

Outputs

On/Off

On

Run Relay Status

Outputs

On/Off

On

Run/Crank Relay Status

Outputs

On/Off

On

Start LED Duty Cycle

Outputs

%

Varies

Accessory LED Duty Cycle

Outputs

%

Varies

OFF LED Duty Cycle

Outputs

%

Varies

Rear Integration Module (RIM)

Operating Conditions: Ignition ON, Engine OFF

Battery Voltage Signal

Data

Volts

12.5

Run/Crank Terminal Status

Inputs

Active/Inactive

Active

Sunroof Enable Command

Outputs

Enable/Disabled

Enable

Remote Control Door Lock Receiver (RCDLR)

Operating Conditions: Ignition ON, Engine OFF

Battery Voltage Signal

Data

Volts

12.5

Ignition Mode Switch

Data

Volts

12.5

Ignition Mode Switch

Data

Idle, ACC/OFF, Run

Idle

Ignition Switch Fault

Data

No/Yes

No

Invalid Power Moding

Data

No/Yes

No

Back up Power Moding

Data

Inactive/Active

Inactive

Run/Crank Relay Command

Data

On/Off

Off

Run/Crank Relay Status

Data

On/Off

On

Driver/Passenger Door Module (DDM/PDM)

Operating Conditions: Ignition ON, Engine OFF

Door Ajar Switch

Data

Door Closed/Door Ajar

Door Closed