BMW 1999-2005 M3 Service Manual page 99

On-Board Diagnostics
BMW P-code
code
45
47 MS 43
48 MS 43
49
50 P1145
MS 42
MS 43
51 MS 43
52
53 P1509
55 P0155
56
5 of 20
Fault type and Signal type and
function range
Multi functional Input binary
steering wheel, stream (0-12V)
toggle-bit
Torque monitoring DME internal
level 1 values logical
Internal control DME HW test
module memory
ECU internal test DME HW test
Running losses Output digital
valve (3/2), final on/off (active low)
stage
ECU internal test DME HW test
ECU internal test DME HW test
Rear exhaust valve Output digital
flap steady (active low)
Idle control valve Output digital
opening coil pulse width (active
low)
Oxygen sensor Output digital
heater pre-cat pulse width (active
(Bank 2) low)
Ignition feedback, Input analog (32V) Check for correct signal
interruption at
http://ebahn.bentleypublishers.com/BMW/3/E46/Repair%20Manuals/8...
Explanation
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.
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.
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.
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.
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.
voltage. If voltage is 32V
2/25/2009 11:23 PM