INSTRUMENT CLUSTER - REDESIGN
TECHNICAL SERVICE BULLETIN
Reference Number(s): 62 03 89 (1833), Date of Issue: June, 1990
BMW All E32 and E34
GROUP 62 - Instruments
Superceded Bulletin(s): 62 03 89 (1833), Date of Issue: March, 1989
SUBJECT

NOTE: This Service Information bulletin supersedes the (orange) Advance Dealer Information bulletin 62 03 89 (1833) dated March, 1989.

Please remove and discard (orange) Advance Dealer Information bulletin 62 03 89 (1833) dated March, 1989 from your S.I. binder.

Instrument Cluster - Redesign
SITUATION

During 2/89 production a redesigned instrument cluster was phased into production.

Cosmetically, changes to the cluster are minimal. However, technical changes, particularly in regards to servicing and troubleshooting, are extensive.
TECHNICAL CHANGES

* Internal faults within the cluster and Check Control are now recognized and stored in a fault memory that can be read using the Diagnostic Link of the BMW Service Tester.
* The coding plug is no longer part of the wiring harness connector X16. It plugs directly into the cluster.
* The audible turn signal relay is now located in the cluster on the main processing board.
* The mileage can be displayed after the ignition is turned OFF by depressing the trip odometer reset button. This is permitted up to 25 seconds after turning the ignition OFF
* The fuel economy display for M70 equipped vehicles is now calculated with ti signals from both DME Control Units.

SERVICING INFORMATION

The cluster system test and coding plug information display can now be performed by following this procedure.

1. Ignition position OFF.
2. Press and hold Check Control button located on the right side of the cluster.
3. Turn ignition to RUN while keeping the Check Control button depressed.
4. The following information will now be displayed: (release CC button at this time)
* internal BMW number
* number of the coding plug
* K number
* chassis number
* software version
* internal modification index

After this information has been displayed, the cluster system test begins.

This system test has been expanded to activate all instruments and the low fuel level light.

If the coding plug has been replaced, the red indicator in the odometer will be illuminated at this same time.
OTHER CHANGES

The instrument cluster - redesign can be easily identified by the new location for the phototransistor. Refer to Fig. 1 .

Fig. 1: New Location For The Phototransistor

The number, location, and wattage of individual lamps within the cluster has changed. At the rear of the electronic baseplate there are ten 1.2 watt bulbs and six 1.5 watt bulbs. Refer to Fig. 2 .

Fig. 2: 1.2 Watt Bulbs & 1.5 Watt Bulb Positions

In order to remove either the speedometer or tachometer from the instrument carrier, the four locking tabs for the instrument must be depressed as the instrument is pulled forward. Refer to Fig. 3 .

Fig. 3: Speedometer Lock Tab Release Slot Locations
DIAGNOSTIC INFORMATION

As previously mentioned, internal faults within the cluster and Check Control are now recorded in a fault memory These fault codes are readable via the BMW Service Tester.

Also, a speed signal can now be input through the diagnostic link without the use of additional hookups or adaptors.

NOTE: A printout of the fault report along with the Control Unit Test Code must accompany all warranty claims.