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 MANAGEMENTTRANSMISSION CONTROL SYSTEMSDESCRIPTION AND OPERATIONFUNCTIONAL DESCRIPTIONDRIVE PROGRAMS
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Drive Programs
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Drive Programs
Drive Programs
The shift points for the economy and sports program as well as for kickdown are stored in the form of characteristic curves in the control unit. Selection can be made with the program switch between these programs and manual gearshift.
The program switch is designed as a push button connected with respect to ground. Two programs may be selected via push button "A and M".
A-Program
The "A" symbol means automatic or normal driving which requests comfortable shifts and optimum fuel economy. Selecting "A" will post an "E" (economy) in the instrument cluster matrix display.
Selecting the "A" program in conjunction with range position "3" will produce the S-program; shift characteristic will based on performance.
Selector Lever/Gear Assignments For Manual Drive Program:
M-Program
Selecting the "M" will provide the driver with full manual control of all upshift and downshift activity and will post an "M" (manual) in the matrix dispay.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.