GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Crank Request Signal

Engine Data 2

Yes/No

No

GEN L-Terminal Signal Command

Engine Data 2

%

0%

Ignition 1 Signal

Engine Data 1,2

Volts

12.6 V

Starter Enable Relay Circuit Status

Output Driver Data

Fault/OK/Invalid State

OK

Starter Relay Command

Engine Data 2

On/Off

Off

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Electronics Battery Feed

Data, Inputs

Volts

12.6 Volts

Load Management Status

Outputs

Active / Inactive

Inactive

Inadvertent Power Relay

Outputs

On/Off

On

Transmission Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

IMS

Transmission Data

Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Drive 2/Drive 1, Drive 1, INVALID

Park