GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster Scan Tool Data Parameters
Table 2: Instrument Panel Cluster Scan Tool Output Controls

Instrument Panel Cluster Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

ABS Lamp

--

Off

The scan tool displays On or Off. The state of the antilock brake system (ABS) indicator as commanded by the instrument panel cluster (IPC).

Air Bag Lamp

--

Off

The scan tool displays On or Off. The state of the air bag indicator as commanded by the instrument panel cluster (IPC).

Battery

--

ON

The scan tool displays 0-19 volts. The voltage at the battery positive voltage circuit of the IPC.

Battery Voltage

--

Varies

This displays volts. This is the voltage input supplied to the instrument panel cluster.

Brake Lamp

--

Off

The scan tool displays On or Off. The state of the brake system indicator as commanded by the IPC.

Change Engine Oil

--

Off

The scan tool displays On or Off. This is the state of the change engine oil indicator as commanded by the IPC.

Check Engine Oil Level

--

Off

The scan tool displays On or Off. This is the state of the change engine oil level indicator as commanded by the IPC.

Check Gages Lamp

--

Off

The scan tool displays On or Off. The state of the CHECK GAGES indicator as commanded by the IPC.

Crank Voltage

--

Varies

The scan tool displays volts.

Displayed Battery Voltage

--

Varies

The scan displays 0-19 volts. This is the displayed battery voltage in IPC.

Displayed Coolant Temp

--

Varies

The scan tool displays 38-128°C (100-260°F). The displayed coolant temperature gage value in the IPC. This value may slightly differ from the monitored coolant temperature.

Displayed Fuel Level

--

Varies

The scan tool displays 0-100%. The displayed fuel gage value in the IPC. This value may slightly differ from the monitored fuel level.

Displayed Odometer

--

Varies

The scan tool displays 0-999999 km (miles). The displayed odometer value in the IPC.

Displayed Oil Pressure

--

0 kPa (0 psi)

The scan tool displays 0-682 kPa (0-99 psi). The displayed oil pressure gage value in the IPC.

Displayed Trip Odometer Mileage

--

Varies

The scan tool displays 0-999999 km (miles). The displayed trip odometer value in the IPC.

Engine Shutdown Indicator

--

Off

The scan tool displays On or Off. This is the state of the engine shutdown indicator as commanded by the IPC.

Engine Speed

--

0 RPM

The scan tool displays 0-9999 RPM. The PCM computes the engine speed. It should remain close to desired idle under various engine loads with the engine idling.

Fasten Seat Belts

--

Off

The scan tool displays On or Off. The state of the fasten safety belt indicator as commanded by the IPC.

Ignition 0

--

Varies

The scan tool displays On or Off. The state of the ignition 0 voltage circuit as monitored by the BCM.

Ignition 1

--

Varies

The scan tool displays On or Off. The state of the ignition 1 voltage circuit as monitored by the BCM.

Ign. Since Current DTC

--

Varies

The scan tool displays 0-50. The IPC counts the number of times the ignition is cycled since the current DTC was set.

Low Coolant

--

Off

The scan tool displays On or Off. This is the state of the low coolant indicator as commanded by the IPC.

Monitored Coolant Temp

--

Varies

The scan tool displays 40-419°F (40-215°C). The IPC monitored coolant temperature data as provided by the PCM via the class 2 serial data link.

Monitored Fuel Level

--

Varies

The scan tool displays 0-100%. The IPC monitored fuel level percent as provided by the PCM via the class 2 serial data link.

Monitored Oil Pressure

--

0 kPa (0 psi)

The scan tool displays 0-682 kPa (0-99 psi). The IPC monitored oil pressure as provided by the PCM via the class 2 serial data link.

Overspeed Lamp

--

Off

The scan tool displays On or Off. This is the state of the overspeed lamp indicator as commanded by the IPC.

PRNDL State

--

Park

The scan tool displays Park, Reverse, Neutral, Drive, Overdrive, First, Second, Third and Invalid. The state of the PRNDL as commanded by the IPC.

Reduced Engine Power

--

Inactive

The scan tool displays Active or Inactive. This is the state of the engine power being reduced.

Trip Reset Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the trip reset switch.

Vehicle Speed

--

0 mph (0 km/h)

The scan tool displays 0-255 km/h (0-155 mph). The IPC monitors the vehicle speed signal circuit from the PCM.

Instrument Panel Cluster Scan Tool Output Controls

Output Control

Description

IPC Gages

The IPC drives all gages to the maximum physical position when you select On. The IPC drives all gages to the minimum physical position when you select Off.

Lamp Test

The IPC illuminates all the indicators when you select On. The indicators should remain illuminated until commanded Off.

Setup SDM Serial Number in IPC

The replacement of the instrument panel cluster (IPC) will require that the SDM part number be relearned by other modules.