display BMW 328I CONVERTIBLE 1999 E36 Convertible Tops Manual

Convertible Tops - 20
CONTROL MODULE DIAGNOSIS/TROUBLESHOOTING
 Faults that occur during opera-
tion of the top are stored in the
CVM.
 They are accessed with the DIS
Tester or MoDiC.
 The table reflects the possible
fault codes stored in the CVM.
 Additionally, the diagnostic
requests (status) and compo-
nent activation function pro-
vides quick diagnostic checks
of signal status and output
function of components.
 Always verify the control mod-
ule identification against the
tester display screen when
testing or troubleshooting the
EM top system.
 Always check any associated
or inter-connected systems
when troubleshooting EM top
problems. (ie: ZKE IV).
 Check the coding data to
make sure the control module
is coded correctly for the spe-
cific top system in the vehicle.
 Always use the latest software
available to test and trou-
bleshoot the system.Fault Code Description
1 Short to ground motor
2 Short to B+ motor
3 Position not plausible
4 Distance/time measurement of the
convertible top
5 Fault “rollover sensor”
6 Internal fault of the module
7 Current through CVM too great

CONVERTIBLE TOP STORAGE LID POSITION HALL SENSOR TESTS
Before testing always verify pin numbers and
wire colors from the appropriate ETM.
DC Voltage Test Procedures:
•At X13145 disconnect and access ground
(pin 6) and the hall sensor supply voltage
(pin 3) = battery voltage.
•Re-connect plug and check hall sensor sig-
nal (pin 2), activate convertible top, with
storage lid in motion = 5.0 volts.
Tap switch to display high/low signal - High = 10.0 volts.
Low = 0 volts.
Voltage Frequency Test Procedure:
•With storage compartment lid moving in either direction, pin 2 = 70 Hz.
Convertible Tops - 22
v
v
mV
mA
mA
v
ACOM
FLUKE 87
FLUKE 87
FLUKE 87
Hz