GM Service Manual Online
For 1990-2009 cars only
Table 1: Rear HVAC/RSA Scan Tool Data Parameters
Table 2: Rear HVAC/RSA Scan Tool Output Controls

Rear HVAC/RSA Scan Tool Data Parameters

Parameter

System State

Expected Value

Definition

Operating Conditions: Ignition ON

Battery Voltage

--

Varies

This displays volts. This is the voltage input supplied to the rear HVAC.

Display Dimming Signal

--

Varies

This displays volts. This is the current voltage supplied to the rear HVAC display dimming.

Left Rear Heated Seat Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the left rear heated seat switch.

Power Button

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear seat audio system.

Program Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear seat audio program switch.

Rear Audio Seek Down Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear audio seek down switch.

Rear Audio Seek Up Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear audio seek up switch.

Rear HVAC Fan Down Sw.

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear HVAC fan down switch.

Rear HVAC Fan Down Sw.

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear HVAC fan up switch.

Rear Temperature Down Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear temperature down switch.

Rear Temperature Up Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear temperature up switch.

Right Rear Heated Seat Switch

--

Inactive

The scan tool displays Active or Inactive. This is the state of the right rear heated seat switch.

Source

--

Inactive

The scan tool displays Active or Inactive. This is the state of the rear audio source switch.

Rear HVAC/RSA Scan Tool Output Controls

Scan Tool Output Control

Description

Display(s) Test

The rear HVAC/RSA module will illuminate all indicators and display segments on the module display.

Infrared Transmitter Power Control

The rear HVAC/RSA module will activate the infrared transmitter, which sends wireless signals to the RSA headphones.