GM Service Manual Online
For 1990-2009 cars only

PCM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

A/C High Side Pressure

Engine Data 2

kPa/psi

0 to 4000 kPa

(0 to 580 psi)

A/C High Side Pressure

Engine Data 2

Volts

0 to 5 Volts

A/C Off for WOT

Engine Data 2

Yes/No

No

A/C Pressure Disable

Engine Data 2

Yes/No

No

A/C Relay Circuit Status

Output Driver Data

OK/Fault/Invalid

OK

A/C Relay Commanded

EGR Data

Engine Data 1

Engine Data 2

Misfire Data

On/Off

Off

A/C Request Signal

Engine Data 2

Yes/No

No

ECT Sensor

Engine Data 1

Engine Data 2

EVAP Data

Fuel Trim Data

Misfire Data

Degrees

-40 to +215°C

(-40 to +420°F)