GM Service Manual Online
For 1990-2009 cars only

The Keyless Entry Scan Tool Data List contains all of the keyless entry related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the location of the parameter within the scan tool menu selections. Use the Keyless Entry Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Vehicle .

Use the Scan Tool Data List only after the following is determined:

    • There is no published DTC procedure nor published symptom procedure for the customer concern.
    • The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Valu

Operating Conditions: Ignition ON/Engine OFF

Battery Voltage Signal

Data

Volts

12 Volts

Courtesy Lamp Output

Outputs

On/Off

Off

DRL Status

Outputs

On/Off

On

Horn Relay Command

Outputs

On/Off

Off

Remote Lock Output.

Key FOB Information

On/Off

Off

Remote Unlock Output

Key FOB Information

On/Off

Off