Schematic of Peake Research AB03 Adapter
The Peake Research AB03 is meant to adapt the older R5/FCX and R5/SRS code readers, which have a 20-pin round connector on the bottom, to newer BMWs that do not have the 20-pin round DLC connector under the hood. Around 2001 BMW deleted the DLC connector and put those functions onto manufacturer specific pins on the OBD-II connector under the dash.
So here is the pinout.
Rectangular OBD-II Connector, 16 Male Pins <---> Round DLC Connector,
20 Female Pins
|
OBD-II
|
DLC
|
Function
|
|
4 & 5
|
19
|
Ground
|
|
7 & 8
|
17
|
K-Line
|
|
15
|
15
|
L-Line
|
|
16
|
16
|
+12V Battery
|
On eBay there is a seller in Hong Kong that sells a OBD-II <--> DLC adapter cable, but, this is completely the opposite sex as the Peake AB03. The OBD-II is female pins and DLC is male pins. I ohm'd it out and the pinout is as follows. This pinout is wrong and I could not get this adapter to work with anything. I believe the problem is OBD-II pin 16 should to DLC pin 16, not 14. Some diagnostic cable/software want battery on OBD pin 16 and Ignition on OBD pin 1. OBD pin 1 needs to connect to DLC pin 16.
|
OBD-II
|
DLC
|
Function
|
|
4 & 5
|
19
|
Ground
|
|
7
|
17 & 20
|
K-Line
|
|
15
|
15
|
L-Line
|
|
16
|
14
|
+12V Battery
|
While I'm at it. I'll continue with the pinout for the Actron DB-15 <--> OBD-II cable. This cable has a DB-15 pin Female on one end which connects to some of Actron OBD scanners and on the other end is a OBD-II female connector.
|
OBD-II
|
DB-15F
|
Function
|
|
2
|
2
|
|
|
4 & 5
|
3 & 14
|
Gnd
|
|
6
|
11
|
|
|
7
|
8
|
K-Line
|
|
9
|
10
|
|
|
10
|
1
|
|
|
12
|
13
|
|
|
14
|
7
|
|
|
15
|
9
|
L-Line
|
|
16
|
15
|
+12V Battery
|
Carsoft DLC-20 <--> HD15F cable
|
DLC-20
|
HD-15F
|
Function
|
|
7
|
1
|
Service Reset
|
|
14
|
15
|
+12V Battery
|
|
15
|
14
|
L-Line
|
|
16
|
8
|
Ignition
|
|
17
|
7
|
K-Line
|
|
19
|
4
|
Gnd
|
|
20
|
6
|
K-Line
|
Carsoft OBD-II <--> HD15F cable
|
OBD-II
|
HD-15F
|
Function
|
|
1
|
8
|
+12V Ignition
|
|
2
|
2
|
|
|
3
|
3
|
|
|
4 & 5
|
4
|
Ground
|
|
6
|
5
|
|
|
7
|
6
|
K-Line
|
|
8
|
7
|
K-Line
|
|
10
|
9
|
|
|
12
|
11
|
|
|
14
|
13
|
|
|
15
|
14
|
L-Line
|
|
16
|
15
|
+12V Battery
|
PA Soft 1.3.6 Interface DLC-20 <--> DB-9F cable
|
DLC-20
|
DB-9F
|
Function
|
|
14
|
9
|
+12V
|
|
19
|
1 & 2
|
Gnd
|
|
15, 17 & 20
|
4
|
L & K-Line
|
PA Soft 1.3.6 Interface OBD-II <--> DB-9F cable
|
OBD-II
|
DB-9F
|
Function
|
|
16
|
9
|
+12V
|
|
4 & 5
|
1 & 2
|
Gnd
|
|
7 & 8
|
4
|
K-Line
|
|
Molex Mini-Fit
|
Function
|
Wire Color
|
DLC-20
|
OBD-II
|
|
1
|
F_TD
|
Blk
|
1
|
9
|
|
2
|
K-Line1
|
Wht/Vio/Yel
|
2
|
--
|
|
3
|
Vio/Wht
|
4
|
--
|
|
|
4
|
Service
|
Wht/Grn
|
7
|
--
|
|
5
|
Blu
|
12
|
--
|
|
|
6
|
Battery
|
Red
|
14
|
16 Red/Blk
|
|
12
|
Battery
|
Red
|
14 Red
|
--
|
|
7
|
Ignition
|
Grn/Wht
|
16
|
1
|
|
8
|
K-Line2
|
Wht/Vio/Yel
|
17 Wht/Vio
|
7
|
|
9
|
Wht/Vio
|
--
|
8
|
|
|
10
|
Ground
|
Brn/Blk
|
19 Brn
|
5
|
|
11
|
Ground
|
Brn
|
19
|
4
|
Service Reset on BMWs equipped with the DLC20 connector under the hood (before mid-2000).
Turn the ignition to the ON position
Short pins 7 and 19 for 3-5 seconds to reset the Oil Service
Short pins 7 & 19 for 11 seconds to reset the Inspection
Someone posted a mod of sorts on one of the forums that to use a BMW code reader through the OBD-II port on an older BMW (with 20-pin DLC connector under the hood) can be done by shorting pins 2, 17 and 20 on the connector under the hood and then no 16-pin to 20-pin adapter cable needed. I have not verified this myself and am not even sure it will work, so take it with a grain of salt.
GM5 Repair Service web page.
To V23078-C1002-A303 web page.
To V23072-C1061-A303 web page.
BMW General Module III (GM3) Page