Diagnostic Information on Saturn Audio Systems. Saturn Saturn 1994

For 1990-2009 cars

# Diagnostic Information on Saturn Audio Systems

Subject: | Diagnostic Information on Saturn Audio Systems

Models: | 1991-1994 Saturns

### Purpose:

This bulletin provides audio system performance information for use in diagnosing system performance concerns.

### Procedure:

Before a customer concern can be diagnosed, normal audio system performance must be verified, using the following performance checks in the Audio System Diagnostic Chart. The Audio System Diagnostic Chart is further divided into the types of radios offered for the model years.

Once the correct system operation is verified, refer to Audio System diagnostics in the Power Distribution section of the 1991-1994 Electrical Service Manual, to further diagnose the concern.

Important: For 1995 model year vehicles, refer to the Power Distribution section of the 2nd Edition 1995 Electrical Service Manual for the Audio Diagnostic Chart.

#### Audio System Diagnostic Chart 1991-1994 Vehicles

AM FM Stereo
Action | Verify
--- | ---
Rotate VOL RCL (Volume Recall) knob clockwise | Radio Turns ON, volume increases as VOL RCL knob is turned clockwise or decreases as VOL RCL knob is turned counterclockwise.
Press in VOL RCL (Volume Recall) knob | Display is switched from time to radio frequency. If the VOL RCL knob is pushed again it will switch back to time. If the VOL RCL knob is not pushed again, the display will go back to time after approximately 5 seconds.
Rotate TUNE AM/FM (Tuner AM/FM) knob | Radio frequencies change as TUNE AM/FM knob is turned. Radio frequencies increase as the TUNE AM/FM knob is turned clockwise, the radio frequencies decrease as the TUNE AM/FM knob is turned counterclockwise.
Push-in TUNE AM/FM (Tuner AM/FM) knob | As TUNE AM/FM knob is pushed-in, the radio switches alternately between AM and FM bands.
Rotate the Balance knob (located behind the VOL RCL--Volume Recall-- knob) | The sound moves from left-to-right as the Balance knob is turned clockwise toward R or right-to-left as the Volume knob is turned counterclockwise toward L.
Rotate the Fade knob (located behind the TUNE AM/FM --Tuner AM/FM--knob) | The sound moves from front-to-rear as the Fade knob is turned clockwise toward F or rear-to-front as the Fade knob is turned counterclockwise toward R.
Slide the TREB (Treble) lever | The treble increases as the TREB lever is moved up toward + or decreases as the TREB lever is moved down towards -.
Slide the BASS lever | The bass increases as the BASS lever is moved up towards + or decreases as the BASS lever is moved down toward -.
Press the SCAN push-button | The radio increases frequency to the next higher station as the right side of the SCAN push-button is pressed-in or decreases frequency to the next lowest station as the left side of the SCAN push-button is pressed-in. The radio station will remain there until the SCAN push-button or VOL RCL knob is pressed.
Press and hold the right side of the SCAN push-button and then press the left side of the SCAN push-button. | The radio increases frequency to the next higher station, then pauses for a few seconds and then continues to increase to the next higher station. This sequence will continue until the SCAN push-button or VOL RCL knob is pressed.
Press and hold the left side of the SCAN push-button and then press the right side of the SCAN push-button | The radio decreases frequency to the next lower station, then pauses for a few seconds and then continues to decrease to the next lower station. This sequence will continue until the SCAN push-button or VOL RCL knob is pressed.
Press the station Select push-button | When pressed, the radio station changes to the preset station. To set station in memory, tune in the desired radio station, push the SET push-button and within 5 seconds press one of the 4 Select push-button.
Set the Clock | Press the SET push-button and release. Within 5 seconds, press and hold Seek up push-button (the right side of the SCAN push-button) to set the hour. Press and hold the Seek down push-button (the left side of the SCAN push-button) to set the minutes.

AM/FM Stereo W/Cassette
Action | Verify
--- | ---
Perform tests 1-13 under AM/FM Stereo | Verify that the controls listed in tests 1-13 operate the same.
Insert tape, rotate VOL PRGM RCL (Volume Program Recall) knob | Tape plays.
Press Forward >> push-button | The tape goes into fast forward to another part of the tape. Press the EJECT push-button to the first detent to stop fast forward.
Press Reverse << | The tape goes into fast reverse to another part of the tape. Press the EJECT push-button to the first detent to stop fast reverse.
Press the VOL PRGM REC (Volume Program Recall) push-button | The tape reverses direction and other track plays.
Press DNR® * (Dynamic Noise Reduction) push-button | The tape player noise (hiss) is reduced.
Press the EJECT push-button | The tape stops and is ejected. The radio returns to the last set radio station.
*DNR® is a registered trade mark of National Semiconductor Corporation.

AM/FM Stereo W/Cassette and Graphic Equalizer
Action | Verify
--- | ---
Perform tests 1-13 under AM/FM Stereo | Verify that the controls listed in tests 1-13 operate the same.
Insert tape, rotate VOL RCL (Volume Recall) knob clockwise | The tape plays.
Press the FWD (Forward) push-button | The tape goes into fast forward to another part of the tape. Press FWD again or press the EJECT push-button to the first detent to stop fast forward.
Press the REV (Reverse) push-button | The tape goes into fast reverse to another part of the tape. Press REV again or press the EJECT push-button to the first detent to stop fast reverse.
Press the REPT (Repeat) push-button | The current song will be repeated.
Press the SEEK push-button | The tape will advance to the next song on the tape.
Press the ^ v (Tape Track Selection) push-button | The tape reverses direction and other track plays.
Press the EJECT push-button | The tape stops and is ejected. The radio returns to the last set radio station.
Slide the 5 band equalizer levers | The bass, midrange, and treble will change as the equalizer levers are moved up + and down -.
Press the LOUD (Loudness) push-button | The bass sound is enhanced.
Press CrO2 (Chrome/Metal) push-button | Selects the type of tape being used.
Set the Clock | Turn the radio OFF. Press the SET push-button and release. Within 5 seconds, press and hold the Seek down push-button (the left side of the SCAN push-button) to set the hour. Press and hold the Seek up push-button (the right side of the SCAN push-button) to set the minutes.

AM/FM Stereo W/CD Player
Action | Verify
--- | ---
Perform tests 1-13 under AM/FM Stereo | Verify that the controls listed in tests 1-13 operate the same.
Rotate the VOL RCL (Volume Recall) knob clockwise | Turns the radio/CD player ON.
Insert compact disc (CD) part way into the slot, label side up | The CD should be drawn into the CD player. If the CD comes back out, check to see if the CD is upside down, if the CD is dirty, scratched or wet, or if there is too much moisture in the air.
Press the VOL REC (Volume Recall knob | The CD track playing will be displayed
Press the SEEK + push-button | The CD will play the next track.
Press the SEEK - push-button | The CD will replay the current selection from the start
Press the SCAN/SEEK push-button | The CD will advance to the next forward track, play for a few seconds, then advance to the next forward track. To stop scanning, press the center of the SEEK/SCAN button again.
Press the COMP (Compression) push-button | Pressing the COMP button makes loud and soft passages more equal in volume.
Press the AUD SRCH (Audible Search) push-button | Press + or - to scan at a fast rate forward or backward within the present track.
Press the PLAY/PAUSE push-button | The CD will stop playing. Press PLAY/PAUSE again to restart the CD. The CD will resume playing at the point where it stopped.
Press the EJECT/STOP push-button | The CD will stop playing and the radio will start playing. Press EJECT/STOP again and the CD will be ejected. If the CD does not eject, press and hold the EJECT/STOP push-button for 5 seconds. The CD player will reset and release the disc.
Press the LOUD (Loudness) push-button | The bass sound is enhanced.