RADIO,VIC AND PHONE CONDITIONS DIAGNOSIS AND SERVICE
MODELS/YEARS 1989 TORONADO AND TROFEO MODELS
Five conditions have been identified on 1989 Toronados and Trofeos which could affect radio, VIC, and Cellular Telephone operation. Before diagnosing VIC, phone, and radio systems on the 1989 Toronado and Trofeo, review the following information:
RADIO BLANK WITH BCM WAKE-UP PRESENT AND KEY IN ACCESSORY POSITION
Models Affected: Vehicles with Climate Control Panel, from start of production to VIN KU300250 (without option U68/Visual Information Center).
The radio display may be blank with key turned to accessory and door open, courtesy lamp switch on, Twilight Sentinel on, or manual headlamps on. With the blank display, the radio will respond to key presses, change stations and balance, the antenna will be up and audio will operate.
The cause is incorrect Body Computer Module PROM which makes the radio display completely dim or blank with key in accessory and any BCM "wake-up" signal present.
To correct this condition check the BCM PROM I.D. (parameter BD99). A PROM I.D. of 3773 is OK. Vehicles before VIN KU300250 have a BCM PROM I.D. of 0593 or 593. This BCM PROM should be replaced with service PROM P/N 16123765, PROM I.D. 3773.
RADIO AUDIO INOPERATIVE WITH RADIO DISPLAY ILLUMINATED
Models Affected: Vehicles with Climate Control Panel, from start of production to VIN KU301352, with Steering Wheel Controls and without option U68/Visual Information Center.
The radio display may illuminate with the antenna in the down position and audio off. Pressing the radio on/off key twice will correct the condition for the remainder of the key cycle. This condition is highly intermittent and very difficult to duplicate for diagnostic purposes. The cause is the Climate Control Panel (CCP).
To correct the conditions on steering wheel control equipped cars only, replace the Climate Control Panel with service P/N 16134787 (production P/N 16134443). The Climate Control Panel is available through GMSPO on an exchange basis (like an ECM or BCM). The original 1989 service part number (1228878) has been superseded by the new part number.
NOTES: 1. This condition can only occur on steering wheel control equipped vehicles. Non-steering wheel control equipped vehicles have a different CCP that cannot cause the radio condition.
2. Some early cars with Climate Control Panel service P/N 1228878 have been revised to repair the condition. These parts may be identified by a pink dot (paper sticker) on the left or right side of the Climate Control Panel. Do not replace the "pink dot" parts.
WARRANTY INFORMATION:
Labor Operation Number: D0362 - Control Assembly, A/C, Replace.
INTERMITTENT RADIO FADES LEFT CAUSED BY STEERING WHEEL CONTROL DATA MESSAGES
Models Affected: All vehicles with Steering Wheel Controls option N32, from start of production to VIN KU303452
On cars equipped with option N32, steering wheel controls, all right radio speakers can mute after key on. (Audio comes out of left side speakers only.) The condition will be intermittent.
The cause is the computer in the steering wheel control assembly (under the horn pad) sending an invalid message to the radio when the ignition key is turned to run or accessory. On vehicles built prior to VIN KU303452, install P/N 16135280 "Delay Relay" in series with the steering wheel control translator module. Vehicles built after VIN KU303452 have the delay relay feature as a part of the steering wheel control/horn pad.
To install the delay relay:
1. Remove left hush panel.
2. Disconnect translator module.
3. Connect delay relay in series with the translator module and steering column connector.
4. Tape excess lead length and delay relay to the translator module and tape the translator module to the steering column.
5. Reinstall hush panel.
Refer to Sections 3F and 3F1 in the 1989 Toronado Service Manual for translator module component view and remove and replace procedure.
NOTES: Try and duplicate the fade left condition by performing key-on/key-off cycles to be sure that the steering wheel control is the cause. Duplicate the condition then disconnect the translator module and try to duplicate the condition again.
Some early Bose equipped cars (before VIN KU303452) were fitted with a delay relay at assembly.
Some steering columns incorporated the delay function as early as VIN KU302844, a delay relay should not be used.
WARRANTY INFORMATION:
Labor Operation Number: T6367 Labor Time: .2 hr. Trouble Code: 92
ANTENNA STAYS UP WITH RADIO OFF AND POSSIBLE AM-FM SWITCHING PROBLEM
Models Affected: Vehicles with Visual Information Center option U68 built prior to VIN KU301932.
The power antenna may not retract when the radio is turned off using the VIC "PWR" hard key. The antenna will always retract when the key is turned to the off position. The condition will be present for an entire key cycle and can only be corrected by tuning to certain AM or FM station numbers, turning the key off then back on. To test for the condition, verify the customer complaint (the antenna will not go down when the radio is turned off with the VIC "PWR" hard key). Tune to an AM station number below 600 or an FM station number below 89.1. Turn the key off, wait 60 seconds, then key back on. If the antenna will properly retract with the radio on-off hard key, the condition is caused by VIC software.
IMPORTANT: The power antenna will remain fully extended (regardless of the state of the radio) whenever the cellular phone power is on. If the vehicle is equipped with a factory-installed cellular phone, turn the phone off (via the power button on the handset) prior to attempting antenna diagnosis.
The radio may not switch from AM to FM or FM to AM in response to pressing the VIC AM-FM hard key. The condition can begin to occur at any time. Removing battery power to the radio or VIC controller will not correct the condition. Replacing the radio will not correct the condition.
To correct both of these conditions, replace the original VIC controller with a VIC controller having generation 4.1 software or higher. Perform the following procedure:
1. Check the VIC controller PROM I.D. by selecting "CRT DATA?" under "CRT?" in diagnostics.
If CD99 is 4.1 or greater, do not replace the VIC controller; diagnose per Sections 8D and 9A in the 1989 Toronado Service Manual.
2. If Parameter Number CD99 is 4.0, replace the VIC controller with the revised part containing software version 4.1.
An exchange part can be ordered for next day shipment from the Nippondenso 1-800-443- 3187 (Michigan) or 1-800-242-9901 (outside Michigan)
See Section 8C in the 1989 Toronado Service Manual for VIC controller (CRTC) remove and replace procedure.
WARRANTY INFORMATION:
Labor Operation Number: T6368 Labor Time: .8 hrs. Other Labor Hours: .2 hrs. Administrative Troubel Code: 92
Submit shipping charges for the VIC controller core return under "Sublet Material/Towing". There will be no repair charges from Nippondenso on controllers replaced to update software. Be sure to advise Nippondenso you are using Labor Operation T6368.
VIC PHONE PAGE DISPLAYED AFTER KEY ON
Models Affected: All 1989 with VIC option U68 and Oldsmobile factory cellular phone option U23.
The customer may comment that the phone menu page appears on the VIC after key on instead of the status page. The customer may describe the condition as an intermittent, because the phone menu display depends upon the on/off condition of the phone and the time allowed between entering the car and turning the key to run.
If the phone is turned on and the key is turned to run within 0 to 30 seconds of the BCM receiving a "wake-up" signal, the phone page display will appear instead of "status".
With the phone off, the display sequence will be the "Oldsmobile Toronado" or "Oldsmobile Trofeo" page followed by the "status" page (with radio, date/time, set and outside temp, warmer/cooler buttons, and "PHON" soft key).
This condition is normal, not correctable by part replacement or repair. The "status" page can be selected at any time by pressing the VIC "status" hard key.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
