1989 BMW 3 SERIES ECU

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Page 126 of 228

BMW 3 SERIES 1989 E30 Workshop Manual slightly by hand. Release the throttle slowly
until it reaches 0.2 to 0.6 mm from the throttle
stop. There should be continuity.
29Check the resistance between terminals 3
and 18 as the throttle is op

Page 131 of 228

BMW 3 SERIES 1989 E30 Workshop Manual and cause the system to malfunction. If
the ABS wiring harness is damaged in any
way, it must be renewed.
Caution: Make sure the ignition is
turned off before unplugging or
re-making any electrical
co

Page 132 of 228

BMW 3 SERIES 1989 E30 Workshop Manual 6Be sure to inspect the wear sensor(s) (left
front wheel only, or left front and right rear
wheel). If they’re OK, transfer them from the
old pads to the new ones; if they’re worn by
abrasion, fit

Page 134 of 228

BMW 3 SERIES 1989 E30 Workshop Manual Inspection
1Loosen the wheel bolts, raise the vehicle
and support it securely on axle stands.
Remove the wheel, and refit three bolts to
hold the disc in place. If the rear brake disc is
being worked

Page 135 of 228

BMW 3 SERIES 1989 E30 Workshop Manual adjusting screw and contract the handbrake
shoes (see illustration).
Refitting
7Ensure that the disc is completely clean
before refitting. If penetrating oil was used to
remove the disc, make sure tha

Page 138 of 228

BMW 3 SERIES 1989 E30 Workshop Manual expel the air from the master cylinder. A large
Phillips screwdriver can be used to push on
the piston assembly.
11To prevent air from being drawn back into
the master cylinder, the plug must be refit

Page 139 of 228

BMW 3 SERIES 1989 E30 Workshop Manual the stop-light switch (see Section 13). Note:
On right-hand-drive models, the brake pedal
in on the right-hand side of the vehicle, and is
connected to the left-hand side by a cross-
shaft. The adjust

Page 140 of 228

BMW 3 SERIES 1989 E30 Workshop Manual and push it through until the forward end
comes out at the handbrake lever.
8Insert the cable conduit through the
backplate, and attach the rear end of the
cable to the handbrake lever (rear drum
mode