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

Instrument Cluster Scan Tool Data Parameters

Parameter

System State

Expected Value

Definition

Operating Conditions: Engine ON

Ambient Light Sensor

--

Varies

This displays percent. This is the current status of the ambient light sensor.

Ambient Temperature

--

Varies

The scan tool displays °C or °F. This is the current ambient temperature.

Displayed Coolant Temperature

--

Varies

The scan tool displays °C or °F. This is the current coolant temperature.

Engine RPM

--

Varies

The scan tool displays RPM. This is the current engine speed.

Fuel Level Gauge

--

Varies

The scan tool displays Liters. This is the fuel level based on a fuel level signal received from the fuel sender gauge.

I/P Dimmer Output

--

Varies

The scan tool displays Percent. This is the current status of the I/P dimmer output.

Oil Life Remaining

--

Varies

The scan tool displays Percent. This is the current status of the oil life remaining.

Seatbelt Chime

--

None

The scan tool displays Driver, Passenger, Both or None. This is the what is the current cause the seatbelt chime.

Trip Odometer A/B Switch

--

Off

The scan tool displays On or Off. This is the current status of the trip odometer A/B switch.

TPM System Enabled

--

No

The scan tool displays No or Yes. This is the status of the TPM system.

Vehicle Speed

--

Varies

This displays km/h / mph. This is the current vehicle speed.

Instrument Cluster Scan Tool Output Controls

Scan Tool Output Control

Description

Coolant Gauge Sweep

The IPC controls the Coolant Gauge.

Charge Indicator

The IPC turn the charge indicator On and Off.

Display Test

The IPC illuminates turns all of the IPC lights On and Off.

Fuel Gauge Sweep

The IPC control the fuel gauge.

Low Fuel Lamp

The IPC turns the low fuel lamp On and Off.

Speedometer Sweep

The IPC controls the speedometer.

Tachometer Sweep

The IPC controls the tachometer.