GM Service Manual Online
For 1990-2009 cars only
Table 1: IPM Scan Tool Data List
Table 2: DIM Scan Tool Data List
Table 3: PCM Scan Tool Data List
Table 4: DDM Scan Tool Data List

IPM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition: ON, Engine: OFF

Outside Air Temp.

HVAC Sensors

Degrees

23°C (74°F)

Inside Air Temp.

HVAC Sensors

Degrees

23°C (74°F)

Left AC Duct Temp.

HVAC Sensors

Degrees

23°C (74°F)

Left HTR Duct Temp.

HVAC Sensors

Degrees

23°C (74°F)

Right AC Duct Temp.

HVAC Sensors

Degrees

23°C (74°F)

Right HTR Duct Temp.

HVAC Sensors

Degrees

23°C (74°F)

Left Duct Temp. Desired

HVAC Sensors

Degrees

23°C (74°F)

Right Duct Temp. Desired

HVAC Sensors

Degrees

23°C (74°F)

Left Solar

HVAC Sensors

Counts

0

Right Solar

HVAC Sensors

Counts

0

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 15°C (60°F), Passenger Temperature Control: Neutral

System Program Number

HVAC System Data

Counts

0

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 32°C (90°F), Passenger Temperature Control: Neutral

System Program Number

HVAC System Data

Counts

255

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 15°C (60°F), Passenger Temperature Control: Neutral

Left Program Number

HVAC System Data

Counts

0

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 32°C (90°F), Passenger Temperature Control: Neutral

Left Program Number

HVAC System Data

Counts

255

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 15°C (60°F), Passenger Temperature Control: Neutral

Right Program Number

HVAC System Data

Counts

0

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 32°C 90°F), Passenger Temperature Control: Neutral

Right Program Number

HVAC System Data

Counts

255

Ignition: ON, Engine: OFF, Mode: OFF

Commanded Blower

HVAC System Data

Percentile

0 %

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Fan: Low

Commanded Blower

HVAC System Data

Percentile

10 %

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Fan: HIGH

Commanded Blower

HVAC System Data

Percentile

100 %

Ignition: ON, Engine: OFF, Mode: DEFROST (FRONT)

Selected Air Mode

HVAC System Data

Status

Defrost

Ignition: ON, Engine: OFF, Mode: DEFOG (WINDSHIELD/FLOOR)

Selected Air Mode

HVAC System Data

Status

Defog

Ignition: ON, Engine: OFF, Mode: UPPER (MID)

Selected Air Mode

HVAC System Data

Status

Upper

Ignition: ON, Engine: OFF, Mode: BI-LEVEL (MID/FLOOR)

Selected Air Mode

HVAC System Data

Status

Bi-Level

Ignition: ON, Engine: OFF, Mode: HEATER (FLOOR)

Selected Air Mode

HVAC System Data

Status

Heater

Ignition: ON, Engine: OFF, Mode: AUTO, Temperature: 18°C (65°F) (OAT above 5°C (41°F))

A/C Requested

HVAC System Data

Yes/No

Yes

Engine: ON, Mode: AUTO, Temperature: 18°C (65°F)

Coolant Temperature

HVAC System Data

Degrees

71°C (159°F)

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 18°C (65°F)

Left Temp. Dr. Commanded

HVAC Door Positions

Counts/Volts

30 Counts (0.61 Volts)

Left Temp Dr Actual

HVAC Door Positions

Counts/Volts

30 Counts (0.61 Volts)

Right Temp. Dr. Commanded

HVAC Door Positions

Counts/Volts

214 Counts (4.29 Volts)

Right Temp Dr Actual

HVAC Door Positions

Counts/Volts

214 Counts (4.29 Volts)

Ignition: ON, Engine: OFF, Mode: ANY except OFF, Temperature: 29°C (85°F)

Left Temp. Dr. Commanded

HVAC Door Positions

Counts/Volts

214 Counts (4.29 Volts)

Left Temp Dr Actual

HVAC Door Positions

Counts/Volts

214 Counts (4.29 Volts)

Right Temp. Dr. Commanded

HVAC Door Positions

Counts/Volts

37 Counts (0.74 Volts)

Right Temp Dr Actual

HVAC Door Positions

Counts/Volts

37 Counts (0.74 Volts)

Ignition: ON, Engine: OFF, Mode: DEFROST (FRONT)

HTR/DEF/AC Dr Commanded

HVAC Door Positions

Counts/Volts

19 Counts (0.38 Volts)

HTR/DEF/AC Dr Actual

HVAC Door Positions

Counts/Volts

19 Counts (0.38 Volts)

Ignition: ON, Engine: OFF, Mode: HEATER (FLOOR)

HTR/DEF/AC Dr Commanded

HVAC Door Positions

Counts/Volts

132 Counts (2.64 Volts)

HTR/DEF/AC Dr Actual

HVAC Door Positions

Counts/Volts

132 Counts (2.64 Volts)

Ignition: ON, Engine: OFF, Mode: BI-LEVEL (MID/FLOOR)

HTR/DEF/AC Dr Commanded

HVAC Door Positions

Counts/Volts

175 Counts (3.5 Volts)

HTR/DEF/AC Dr Actual

HVAC Door Positions

Counts/Volts

175 Counts (3.5 Volts)

Ignition: ON, Engine: OFF, Mode: DEFOG (WINDSHIELD/FLOOR)

HTR/DEF/AC Dr Commanded

HVAC Door Positions

Counts/Volts

50 Counts (1.00 Volts)

HTR/DEF/AC Dr Actual

HVAC Door Positions

Counts/Volts

50 Counts (1.00 Volts)

Ignition: ON, Engine: OFF, Mode: UPPER (MID)

HTR/DEF/AC Dr Commanded

HVAC Door Positions

Counts/Volts

233 Counts (4.66 Volts)

HTR/DEF/AC Dr Actual

HVAC Door Positions

Counts/Volts

233 Counts (4.66 Volts)

Ignition: ON, Engine: OFF, Mode: VENT, Temperature: 29°C (85°F)

Air Inlet Dr Commanded

HVAC Door Positions

Counts/Volts

32 Counts (0.65 Volts)

Air Inlet Dr Actual

HVAC Door Positions

Counts/Volts

32 Counts (0.65 Volts)

Ignition: ON, Engine: OFF, Mode: RECIRC+ANY except DEFROST

Air Inlet Dr Commanded

HVAC Door Positions

Counts/Volts

202 Counts (4.04 Volts)

Air Inlet Dr Actual

HVAC Door Positions

Counts/Volts

202 Counts (4.04 Volts)

Ignition: ON, Engine: OFF, Passenger Temperature Control: NEUTRAL

Min Left Temp Dr Pos.

HVAC Door Calibrations

Counts/Volts

30 Counts (0.61 Volts)

Max Left Temp Dr Pos.

HVAC Door Calibrations

Counts/Volts

214 Counts (4.29 Volts)

Min Right Temp Dr Pos.

HVAC Door Calibrations

Counts/Volts

37 Counts (0.74 Volts)

Max Right Temp Dr Pos

HVAC Door Calibrations

Counts/Volts

214 Counts (4.29 Volts)

Min HTR/DEF/AC Dr Pos

HVAC Door Calibrations

Counts/Volts

19 Counts (0.38 Volts)

Max HTR/DEF/AC Dr Pos

HVAC Door Calibrations

Counts/Volts

233 Counts (4.66 Volts)

Min Air Inlet Dr Pos

HVAC Door Calibrations

Counts/Volts

32 Counts (0.65 Volts)

Max Air Inlet Dr Pos

HVAC Door Calibrations

Counts/Volts

202 Counts (4.04 Volts)

Outside Air Temp

Open/Short Data

Counts/Volts

95 Counts (1.86 Volts)

Inside Air Temp

Open/Short Data

Counts/Volts

139 Counts (2.72 Volts)

Left AC Duct Temp

Open/Short Data

Counts/Volts

136 Counts (2.67 Volts)

Left HTR Duct Temp

Open/Short Data

Counts/Volts

136 Counts (2.67 Volts)

Right AC Duct Temp

Open/Short Data

Counts/Volts

136 Counts (2.67 Volts)

Right HTR Duct Temp

Open/Short Data

Counts/Volts

136 Counts (2.67 Volts)

Left Solar Sensor

Open/Short Data

Counts/Volts

232 Counts (4.55 Volts)

Right Solar Sensor

Open/Short Data

Counts/Volts

232 Counts (4.55 Volts)

Left Temp Door Position

HVAC Motors

None/Hot/Cold

None

Right Temp Door Position

HVAC Motors

None/Hot/Cold

None

HTR/DEF/AC Door Position

HVAC Motors

None/Defrost/AC

None

Air Inlet Door Position

HVAC Motors

None/Outside Recirc.

None

Instant OAT Update

Miscellaneous Tests

None/On

None

Blower Motor

Miscellaneous Tests

None/On/Off

None

Recalibrate All Motors

Miscellaneous Tests

None/On

None

Relearn Control Panel Type

Miscellaneous Tests

None/On

None

Afterblow

Set Options

Enable/Disable

Enable

Temperature Offset

Set Options

-5/+5

0 Offset

DIM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine: ON, Mode: AUTO, Temperature: 18°C (65°F)

A/C Clutch (Actual)

A/C Information

On/Off

On

A/C Clutch (Desired)

A/C Information

On/Off

On

Control Head (Desired)

A/C Information

A/C On/A/C Off

A/C On

A/C Pressure

A/C Information

Pressure

1004 kPa (146 psi)

Pressure Status

A/C Information

Low/Normal/High

Normal

Temperature Status

A/C Information

OK/Hot

OK

Clutch Voltage

A/C Information

Normal/Low

Normal

PCM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine: ON, Mode: AUTO, Temperature: 18°C (65°F)

ECT

Engine Data 1

Degrees

71°C (159°F)

ECT

Engine Data 2

Degrees

71°C (159°F)

Commanded A/C

Engine Data 2

On/Off

Off

A/C High Side Pressure

Engine Data 2

Volts

1.75 Volts

A/C Pressure Out Of Range

Engine Data 2

Yes/No

No

A/C Relay

Output Driver Data

OK/Fault

OK

A/C Relay

Engine Output Controls

On/Off

On/Off

DDM Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition: ON, Engine: OFF

Pass. HVAC Switch

Data Display

Counts

220