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Home >> Saturn Truck >> 2002 >> VUE V6-3.0L VIN B >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Description and Operation >> Part 2

Part 2





Radio/Audio System Description and Operation

On Board Diagnostic Mode

Follow the instructions below to enter and properly utilize the On Board Diagnostics:

To Enter On Board Diagnostic Mode

1. Key ON, engine OFF, radio in AM/FM mode.
2. Press and hold RCL button, preset 1 button, and preset 6 button.
3. While holding these buttons, press the VOL knob.
4. A beep sounds when the radio enters On Board Diagnostic Mode.

Use the Seek button to advance to the desired mode, menu options vary according to the radio:

- AM/FM CD Radio (U1C)
- (T-01) Diagnostic Trouble Code Mode
- (T-02) Test Tone Mode
- (T-03) LCD Display Segment Mode
- (T-04) Key Test Mode
- (T-05) Antenna Signal Meter Mode
- (T-06) Clear Diagnostic Trouble Code Mode
- AM/FM Cassette/CD Radio (UP0) and AM/FM Cassette/6 Disc CD Radio (UR9)
- (DTC) Diagnostic Trouble Code Mode
- (TT) Test Tone Mode
- (LCD) LCD Display Segment Test Mode
- (KEY) Key Test Mode
- (EQ) Equalization Settings
- (ANT) Antenna Signal Meter Mode
- (CDCH) Remote CD Player Communications Test
- (CC) Clear Diagnostic Code Mode

Press the RCL button to select the desired mode. Refer to the Diagnostic Mode descriptions.

Press the RCL button (U1C), or the AM/FM button (UP0 and UR9) to return to OBD menu or press VOL knob to exit OBD Mode.

Diagnostic Trouble Code Mode

The diagnostic trouble code mode is available to provide DTCs and the number of times each code has set. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information.

To use the DTC Mode:

- AM/FM CD Radio - Diagnostic trouble code E04 and the number of times it has set will be displayed first. Codes E01 through E03 do not apply to this radio. Use SEEK rocker button to tab through error codes E04, E05, and E06. Press the RCL button to return to the OBD menu. Press VOL knob to exit OBD.
- UP0 and UR9 - Diagnostic trouble code E01 is displayed first. Press the RCL button to see the number of times the DTC has set. Press AM/FM button to return to DTC codes. Use SEEK rocker button to scroll through error codes E01 through E06. Use the RCL button for each code to check the number of times the code has set. Press the AM/FM button again to return to the OBD menu.

Diagnostic Trouble Codes Diagnostic Trouble Code










Test Tone Mode

The Test Tone Mode is available to check for proper speaker function. Once Test Tone mode has been selected, a tone alternating between 100 Hz and 3 kHz will automatically begin to sound. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information.

To use the Test Tone Mode:

- U1C
- The display with show "1" indicating the left front speaker is selected.
- Use the SEEK rocker button to move between speakers, "2" indicates right front, "3" indicates left rear, and "4" indicates right rear.
- Press RCL button to return to OBD menu.
- UP0 and UR9
- The radio will start alternating tones on the left front.
- Use the TUNE rocker button to move between speakers.
- Press AM/FM to return to OBD menu.

If no test tone is heard audibly, increase the volume using the VOL knob. If any of the test tones are not heard from one or more speakers.

LCD Display Segment Mode

The LCD Display Segment Mode is available to verify that all display segments are operating properly. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. If any display segments are not displayed, replace the radio. Refer to Radio Replacement . Press the appropriate button to return to the OBD menu.

AM/FM CD LCD Display Segment






AM/FM Tape/CD and AM/FM Tape/6 CD Display Segments






Key Test Mode

The Key Test Mode is available to verify that each button will function. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. A tone is generated each time a button is pressed, to confirm button operation. If a button is pressed and a tone is not generated, replace the radio. Refer to Radio Replacement Service and Repair.

Important: The RCL button and VOL knob will not produce a tone in this test, as performance of their function is known once the On Board Diagnostic Mode and Key Test Mode have been entered. When the key test is complete, press the appropriate button to return to the OBD menu.

Equalization Setting Mode (UP0 and UR9 ONLY)

Radio equalization settings are customized for each vehicle design. The vehicle wiring to the radio determines proper equalization settings. If the "EQ" setting does not reflect the setting listed here, check for proper terminal connection of circuit 43 (IGN) at the 24-way radio connector. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. The EQ settings are:

- EQ:00 -- Any Saturn with amplifier (RPO WBM)
- EQ:02 -- Saturn ION without amplifier
- EQ:03 -- Saturn VUE without amplifier

Antenna Signal Meter Mode

The antenna signal meter mode is available to evaluate signal strength. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. Once this mode is entered, the audio of the last tuned station is played while the signal strength is displayed. This function may be useful for performing a side-by-side, vehicle-to-vehicle comparison, for evaluating audio system reception complaints. Press the appropriate button to return to the OBD menu.

Clear Diagnostic Trouble Code Mode

The Clear Diagnostic Trouble Code Mode is available to clear the diagnostic trouble code counters. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. Once this mode is selected, press and hold RCL for 2 seconds, a tone will be generated and the DTC counters will reset. Press the appropriate button to return to the OBD menu.

Theft Deterrent Feature

The U1C, UR9, and UP0 are equipped with a programmable theft deterrent feature. When the radio has the SEC (armed) mode activated, the radio will enter the LOCK (locked) mode if the power between the battery and the radio is interrupted for more than 20 seconds. While in the locked mode, "LOCK" appears on the radio display and all radio functions are disabled.

When the vehicle is first purchased or the radio is new or remanufactured, the theft deterrent feature is unarmed. If desired, the customer must program a four-digit code into the radio to activate the theft deterrent feature.

Operating Modes

The theft deterrent feature causes 3 operating modes:

- VULNERABLE (UNARMED) MODE -The radio does not have a 4-digit code stored. If stolen, the radio will operate normally when power is applied.
- SECURE (ARMED) MODE - The radio has a 4-digit code stored. The radio will enter the LOCK (locked) mode if the power between the battery and the radio is interrupted for more than 20 seconds.
- LOCK (LOCKED) MODE - The radio has been removed from power for more than 20 seconds or the wrong four-digit code has been entered while in the SEC (armed) mode.

Important: Before performing service on a vehicle, verify the theft deterrent feature is in the VULNERABLE (unarmed) mode. This check is made by the following steps:

1. Turn the ignition ON. Radio OFF.
2. Press and hold preset buttons "1'" and "2" for 5 seconds.
3. If SEC (armed), a 4-digit number will appear on the radio display. This number is NOT the customer's code. Ask the customer to disarm the feature by following the procedure given in the owner's manual. The procedure is the same procedure used for activating the theft deterrent feature.
4. If no number appears, the theft deterrent feature is VULNERABLE (unarmed) and service may be performed.

Activating Theft Deterrent

To arm the theft deterrent feature, perform the following:

1. Turn the ignition ON. Radio OFF.
2. Press and hold preset buttons 5 and 6, at the same time, for 5 seconds. The radio will display "- - - -".
3. Have the customer select a 4-digit code. (Suggest to use a number that is familiar to them.)
4. Enter the 4-digit code by using the SEEK/SCAN and TUNE rocker buttons. The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed.
4.1. Press the down arrow side of the SEEK/SCAN rocker button to change the left digit.
4.2. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit.
4.3. Press the down arrow side of the TUNE rocker button to change the third to left digit.
4.4. Press the up arrow side of the TUNE rocker button to change the fourth to left digit.
5. Push the AM/FM button. The display will show "REP" (repeat), requesting the 4-digit code to be entered again to verify correct entry.
6. Again, enter the same four-digit code, using the SEEK/SCAN and TUNE rocker buttons.
6.1. Press the down arrow side of the SEEK/SCAN rocker button to change the left digit.
6.2. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit.
6.3. Press the down arrow side of the TUNE rocker button to change the third to left digit.
6.4. Press the up arrow side of the TUNE rocker button to change the fourth to left digit.
7. Push the AM/FM button to store the code.
8. The display will show "SEC" indicating the radio is armed and the radio will return to normal operation.

If the radio displays "Err1", "Err2", or "LOCK", then the radio was already in the secure state and is armed with a different code than the one that was entered. Proceed to the appropriate part of this Theft Deterrent section to deactivate the system if deactivation is desired.

Deactivating the Theft Deterrent Feature -- Radio in "SEC" (ARMED) MODE

To deactivate the theft deterrent feature, enter the customer's code or the factory unlock code using steps 1-7 of the "Activating Theft Deterrent" procedure in this section. After completing those steps, the display will show no number. This indicates the theft deterrent feature is in the VULNERABLE (unarmed) mode and service may be performed.

When the vehicle is returned to the customer, remind the customer to reactivate the theft deterrent feature using the procedure given in the owner's manual.

Deactivating Theft Deterrent -- Radio in "LOCK" or "- - - -" MODE (CODE KNOWN)

When the theft deterrent feature is in the SEC (armed) mode, the radio can enter the locked state if the power is removed for greater than 20 seconds or an incorrect code entry is attempted three times. An error message is displayed after every wrong entry.

When the radio is in the LOCK (locked) mode, "LOCK" is displayed and all radio functions are disabled.

Before another attempt at the correct code can be made, the radio must be ON and the display must show "LOCK" for and hour. After an hour, "- - - -" will be displayed and the correct code may be entered using the following steps.

1. Turn the ignition ON.
2. Press the power button on the radio. The display will show "- - - -".
3. Enter the 4-digit code by using the SEEK/SCAN and TUNE rocker buttons. The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed.
3.1. Press the down arrow side of the SEEK/SCAN rocker button to change the left digit.
3.2. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit.
3.3. Press the down arrow side of the TUNE rocker button to change the third to left digit.
3.4. Press the up arrow side of the TUNE rocker button to change the fourth to left digit.
4. Press the AM/FM button after entering the 4-digit code. If the incorrect code has been entered, the radio will return to the SEC (armed) mode and normal operation will return. If the wrong code is entered, the display will show an error message and display "- - - -" indicating another attempt at the correct code can be made.

Deactivating Theft Deterrent - Radio in "LOCK" or "- - - -" Mode (Code Unknown)

When the theft deterrent feature is armed or secure (SEC), the radio can enter the locked state if the power is removed from the radio for greater than 20 seconds or an incorrect code is attempted 3 times. An error message is displayed after every wrong entry.

When the radio is in the LOCK (locked) mode, "LOCK" is displayed and all radio functions are disabled.

Before another attempt at the correct code can be made, the radio must be ON and the display must show "LOCK" for an hour. After an hour, "- - - -" will be displayed and the correct code may be entered using the following steps:

If the customer code is unknown, perform the following steps to retrieve the customer code:

1. Turn ignition ON.
2. Turn radio power OFF.
3. Press and hold preset buttons "1" and "2" for 5-seconds. A 4-digit code will be displayed. This number is not the customer's code. Record this number as it is needed before technical support is called.
4. Using a touch tone phone only, call the technical support system at 1-888-225-2306 (USA & Canada). When advised, give the following information:
4.1. Your retailer code.
4.2. The 4-digit radio display code obtained in step 3.
4.3. In response, you will receive the factory unlock code; record this number.

NOTE: The factory unlock code received is the same as the code that was entered by the customer.

5. Turn ignition ON.
6. Press the radio power button. The display will show "- - - -".
7. Enter the four-digit code by using the SEEK/SCAN and TUNE rocker buttons. The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed.
7.1. Press the down arrow side of the SEEK/SCAN rocker button to change the left digit.
7.2. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit.
7.3. Press the down arrow side of the TUNE rocker button to change the third to left digit.
7.4. Press the up arrow side of the TUNE rocker button to change the fourth to left digit.
8. Press the AM/FM button after entering the 4-digit code. If the correct code has been entered, the radio will return to the SEC (armed) mode and normal operation will return. If the wrong code has been entered, the display will show an error message and display "- - - -" indicating another attempt at the correct code can be made.
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