BMW 1999-2005 M3, Service Manual

Page: 1243 / 1258

BMW
code P-code Fault type and
function Signal type and
range Explanation
45 Multi functional
steering wheel,
toggle-bit Input binary
stream (0-12V) Every 0.5 sec. a message that
includes a toggle bit (toggles
between 0->1 and 1->0) is
transmitted. Change bit is
monitored to indicate proper
function.
47 MS 43 Torque monitoring
level 1 DME internal
values logical
48 MS 43 Internal control
module DME HW test
memory
49 ECU internal test DME HW test
50 P1145
MS 42 Running losses
valve (3/2), final
stage Output digital
on/off (active low) DME final stage will set flag
whenever a short to ground, a
short to battery voltage or a
disconnection between output
transistor and component
exists.
MS 43 ECU internal test DME HW test
51 MS 43 ECU internal test DME HW test
52 Rear exhaust valve
flap Output digital
steady (active low) DME final stage will set flag
whenever a short to ground, a
short to battery voltage or a
disconnection between output
transistor and component
exists.
53 P1509 Idle control valve
opening coil Output digital
pulse width (active
low) DME final stage will set flag
whenever a short to ground, a
short to battery voltage or a
disconnection between output
transistor and component
exists.
55 P0155 Oxygen sensor
heater pre-cat
(Bank 2) Output digital
pulse width (active
low) DME final stage will set flag
whenever a short to ground, a
short to battery voltage or a
disconnection between output
transistor and component
exists.
56 Ignition feedback,
interruption at Input analog (32V) Check for correct signal
voltage. If voltage is 32V
On-Board Diagnostics http://ebahn.bentleypublishers.com/BMW/3/E46/Repair%20Manuals/8...
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