GM Service Manual Online
For 1990-2009 cars only
Table 1: ABS/TCS
Table 2: Switch Inputs
Table 3: Exterior Lamps
Table 4: Interior Lamps
Table 5: Door Locks
Table 6: Wiper/Washer
Table 7: Security Data

ABS/TCS

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

ABS Fault

Yes/No

No

Battery 1

Volts

Varies

Coolant Gauge Position

% of Gauge

Varies

Displayed Odometer

km/miles

Varies

Fuel Gauge Position

% of Full

Varies

Park Brake Switch

On/Off

On

Traction Active

Yes/No

No

Traction Control Status

On/Off

On

Traction LED Command

On/Off

On

Traction LED Feedback

High/Low

Low

Switch Inputs

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

A/C Request (RPO C60)

Yes/No

No

Battery 1

Volts

Varies

Decklid Ajar Switch

High/Low

High

Driver Door Switch

High/Low

High

Front Wiper Delay Switch

On/Off

Off

High Beam Input=DRL

Yes/No

No

High Beam Input=High

Yes/No

No

High Beam Input=Off

Yes/No

Yes

Key In Ignition

Yes/No

Yes

Lock Switch

On/Off

Off

Low Beam Input = DRL (Late 2004)

Yes/No

No

Low Beam Input = High (Late 2004)

Yes/No

No

Low Beam Input = Off (Late 2004)

Yes/No

Yes

Low Beam Switch

On/Off

Off

Low Brake Fluid

Yes/No

No

Low Coolant

Yes/No

No

Oil Life Reset Switch

High/Low

High

Park Brake Switch

On/Off

On

Parklamp Switch

On/Off

Off

Pass Door Switches

High/Low

High

Rear Defog Relay Cmd.

On/Off

Off

Rear Defog Relay Fdbk.

High/Low

High

Rear Defog Switch (RPO C60)

On/Off

Off

Rear Wiper Switch

On/Off

Off

Shifter Unlock Cmd

On/Off

Off

Shifter Unlock Fdbk.

High/Low

High

Unlock Switch

On/Off

Off

Exterior Lamps

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

ALC Light Sensor

Volts

Varies

Battery 1

Volts

Varies

DRL Relay Command

On/Off

Off

DRL Relay Feedback

High/Low

High

Headlamp Cmd.

On/Off

Off

Headlamp Fdbk.

High/Low

High

High Beam Input

Volts

Varies

High Beam Input=DRL

Yes/No

No

High Beam Input=High

Yes/No

No

High Beam Input=Off

Yes/No

Yes

Low Beam Input (Late 2004)

Volts

Varies

Low Beam Input = DRL (Late 2004)

Yes/No

No

Low Beam Input = High (Late 2004)

Yes/No

No

Low Beam Input = Off (Late 2004)

Yes/No

Yes

Low Beam Switch

On/Off

Off

Parklamp Cmd.

On/Off

Off

Parklamp Fdbk.

High/Low

High

Parklamp Input

Volts

Varies

Parklamp Switch

On/Off

Off

Interior Lamps

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

Battery 1

Volts

Varies

Dome Lamp Command

On/Off

Off

Dome Lamp Feedback

High/Low

High

Driver Door Switch

High/Low

High

Key In Ignition

Yes/No

Yes

Inadvertent Power Cmd.

On/Off

On

Inadvertent Power Fdbk.

High/Low

High

I/P Dimmer Input

Volts

Varies

I/P Dimmer Output

% DC

Varies

Pass Door Switches

High/Low

High

Door Locks

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

Battery 1

Volts

Varies

Driver Unlock Relay Cmd.

On/Off

Off

Driver Unlock Relay Fdbk.

High/Low

Low

Lock All Relay Cmd.

On/Off

Off

Lock All Relay Fdbk.

High/Low

Low

Lock Switch

On/Off

Off

Remote Lock Command

Yes/No

No

Remote Panic Command

Yes/No

No

Remote Trunk Command

Yes/No

No

Remote Unlock Command

Yes/No

No

Pass Unlock Relay Cmd.

On/Off

Off

Pass Unlock Relay Fdbk.

High/Low

Low

Trunk Release Sol. Cmd.

On/ Off

Off

Trunk Release Sol. Fdbk.

High/Low

Low

Trunk Release Switch

On/Off

Off

Unlock Switch

On/Off

Off

Wiper/Washer

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

Battery 1

Volts

Varies

Front Washer Motor Input

On/Off

Off

Front Wiper Delay Relay Cmd.

On/Off

Off

Front Wiper Delay Relay Fdbk.

High/Low

High

Front Wiper Delay Switch

On/Off

Off

Rear Washer Motor Input

On/Off

Off

Rear Wiper Relay Cmd.

On/Off

Off

Rear Wiper Relay Fdbk.

High/Low

Low

Rear Wiper Switch

On/Off

Off

Washer Fluid Level

Low/OK

Ok

Wiper Delay Input

Volts

Varies

Wiper Delay 1

Yes/No

Varies

Wiper Delay 2

Yes/No

Varies

Wiper Delay 3

Yes/No

Varies

Security Data

Scan Tool Parameter

Units Displayed

Typical Data Value

Operating Conditions: Ignition in RUN Position, Engine OFF, All Doors Closed, Park Brake Applied (DRLs OFF)

Accessory

High/Low

High

Auto-Learn Timer

Seconds

Varies

Battery 1

Volts

Varies

Decklid Ajar Switch

High/Low

High

Horn Relay Command

On/Off

Off

Horn Relay Feedback

High/Low

High

Ignition 1 Input

High/Low

High

Key Learned

No

Yes

Key Learn Enabled

Yes/No

Yes

Passlock Input

Volts

Varies

Passlock Power Fdbk.

High/Low

High

Passlock Timer

Seconds

Varies

Security LED

On/Off/Flash

Off

Trunk Release Switch

On/Off

Off