TIMM'S BMW E38
UNLOCKING THE ON-BOARD-COMPUTER (OBC)

To unlock the On-Board-Computer use the two Instrument Cluster buttons (L=Left, R=Right)

1) Press and hold "R" down for 5-6 seconds
2) You'll see TEST NR 01
3) Momentarily press "L"
4) You'll see your vin ID, for instance, mine is 08685
5) ADD THE DIGITS :: 8 + 6 + 8 + 5 = 27
6) press "R" again until you reach TEST NR 19
7) Press "L" to select
8) You'll see "LOCK: ON"
9) Press "L" until you reach "27" (the number that was the addition result)
10) AFTER you have the correct number showing, momentarily press the "R" button
11) Display will revert to TEST NR 01

The OBC is now unlocked


OBC HIDDEN INFORMATION



TEST-NR. 01
FGSTNR: GM8685 (VIN serial number)
K: 7744
BMWTNR: 8387061
CI:12 DI:06 BI:09
DAT: 43/98 (week and year of manufacture)
HW:04 SW:1100/1100
ZYL:08 M:4 S:4095 (cylinders, and what else?)
CAN:02 AEND:14

TEST-NR. 02
(Instrument test)
Only do this test in Ignition Position I or II with the engine not running

TEST-NR. 03
Current fuel consumption in Litres per Hour

TEST-NR. 04
Average fuel consumption, measured in Litres and over a rolling 100Km

TEST-NR. 05
Range remaining given the current fuel consumption and remaining fuel, measured in Km

TEST-NR. 06
TNK: 7.5/31.0/38.5L (current fuel levels: left, right, total)
TNKANZ: 39.4L PHASE1 (average total fuel level)

TEST-NR. 07
KTMP: xxxC (engine core temperature)
N: xxxxx U/MIN (engine RPM)
ATMP: +xx.0C (ambient temperature)

TEST-NR. 08
V: xxx KM/H (current velocity)

TEST-NR. 09
VB: xx.x V (battery voltage)

Useful for battery condition tests. Engine not running value should be above 12V....cranking voltage should not drop below 9V. When fully charged the voltage should show > 14V

TEST-NR. 10
LAND: 02 US (country of sale?)

TEST-NR. 11
EINHEIT 1: F7
EINHEIT 2: FA
EINHEIT 3: 4A


TEST-NR. 12
VANK: xxx.x KM/H
ANK: --:--


TEST-NR. 13
GONG


TEST-NR. 14
DIAG: 1 C7 81 000
DIAG: 2 00 00 000
DIAG: 3 00 00 000
DIAG: 4 00 00 000
DIAG: 5 00 00 000


TEST-NR. 15
PORT A00: xxxxxxxx
PORT A01: 00000111
PORT A02: xx0x0001
PORT A03: 00000011
PORT A04: 000x0101
PORT A05: 001B1111
PORT A06: 00110101
PORT B00: xxxxxxxx
PORT B01: 00100010
PORT B02: xx0x0110
PORT B03: x0111001
PORT B04: 000x1111
PORT B05: 11100111
PORT B06: 00000000

Tests No 15 and 16 show internal register values


TEST-NR. 16
OELTEMP: -48C

Oil Temperature

TEST-NR. 17
RCC-EMPF.: ----MIN


TEST-NR. 18
(No response)

TEST-NR. 19
LOCK: OFF (press Reset to turn the lock back on)

TEST-NR. 20
KVBR: 1000

KVBR is the correction factor for the fuel-consumption meters. By default it is set to '1000'. Adjustment of this default value will give erroneous MPG figures

TEST-NR. 21

RESET all values to default and LOCK the OBC



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