GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module
Table 2: Engine Control Module (ECM)

Body Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, with the engine OFF. Transmission shift lever in the PARK position.

Shift Lock Solenoid Command

Data

Inactive

Active

Engine Control Module (ECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, with the engine OFF. Transmission shift lever in the PARK position.

Ignition Voltage

Auto Transmission Data

Volts

0-25 V

IMS A/B/C/P

Auto 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, Open

Park

Reverse Inhibit Solenoid Circuit Status

Auto Transmission Data

OK, Incomplete, Short B+, Short Gnd / Open

OK

Reverse Inhibit Solenoid Command

Auto Transmission Data

Not Equipped / ON / OFF

ON

TCC Brake Switch

Auto Transmission Data

ON/OFF

OFF