Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSMODIC(R) - LOSS OF PROGRAM
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
MoDic(R) - Loss of Program
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION MoDic(R) - Loss of Program
9215bmw01
Group 04
Tools and Equipment
Bulletin Number
04 30 91 (3454)
Woodcliff Lake, NJ
January 1992
Product Engineering
SUBJECT: Loss of Program in MoDiC
Units
Affected: MoDiCs with Serial Numbers 1610 through 3574
Situation: Loss of program may occur in MoDiCs with serial numbers 1610 through 3574. If this occurs, either of two malfunctions may occur:
- The MoDiC will display the message "No Coding Data Available;" or, - Certain Coding/Diagnosis procedures will not be possible.
Cause: Memory fault in the MoDiC.
Correction: If a memory fault is suspected in a MoDiC with a serial number in the above range, the following test should be carried out:
1. Connect the MoDiC to vehicle diagnostic connector. If the MoDiC displays the message "low batt" on the first line, both batteries (located in the handle) must be replaced.
2. Load the software (appropriate to the vehicle being coded or diagnosed) into the MoDiC via the BMW Service Test, then disconnect the MoDiC from the vehicle's diagnostic connector. Leave the MoDiC disconnected for at least 5 hours (e.g., overnight).
Once this time has passed, reconnect the MoDiC to the vehicle's diagnostic connector and carry out coding diagnosis.
If coding or diagnosis is possible with no malfunctions, then the MoDiC is not affected by this memory fault.
If, on the other hand, coding or diagnosis is not completely possible, or if the MoDiC displays the message "No Coding Data Available", proceed to step 3.
3. With the MoDiC connected to the diagnostic connector of the vehicle on which coding or diagnosis is to be performed, load the appropriate software into the MoDiC via the BMW Service Test. Under no circumstances disconnect the MoDiC from the vehicle's diagnostic connector after the loading procedure is completed.
Repeat the coding or diagnosis (that could not be performed in step 2). If it can now be performed without malfunction, this confirms a memory fault in the MoDiC.
If you confirm a memory fault in a MoDiC, coding and/or diagnosis can be performed as in step 3 in the event of malfunction during specific coding or diagnostic procedures.
If coding or diagnosis is not possible using the procedure in step 3, one or more of the following conditions could be the cause:
- The MoDiC is not loaded with the appropriate coding/diagnostic diskette.
- A control unit is being coded for which the coding data and diskette are not yet available.
- Operator error when using the MoDiC.
Warranty
Status: An Update Program is under development for the affected MoDiCs.
Details of this program will be announced in a separate Service Information Bulletin.
Any dealers experiencing this problem should supply us with written record listing their name, address, dealer code number, MoDiC serial number and send to:
BMW of North America, Inc.
1 BMW Plaza
Montvale, NJ 07645
Attn: Product Service Engineering (MoDiC)
as soon as possible.
Do not return any MoDiCs for this symptom until specifically instructed to do so under the terms of the MoDic Update Program.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.