Smartbox X-431 - Mercedes Benz 16 PIN & 8 Pin Diagnostic Socket

Chapter A • Connector Usage/Chassis Identification Connector Usage
A-4 ©X-431 USA
Mercedes Benz 16PIN & 8pin Diagnostic Socket
- Black Lead
Red Lead
(or battery clip
connector if no
power is present)
Pin Definition
1 Body ground - Black Lead
2 On-board diagnostic switch
3CIS-E/DM
4EDS/LED
5 ASD
6AB
7 AC(124)/RB(129)
8 DI/HFM, SFI, MFI/DMS
9 ADS/RB(124)
10 RST(129)/Speed signal
11 ATA
12 IRCL
13 EATC
14 EA(124)/ISC(124)/ESCM(129)/CC
15 Not used
16
Postive pole of power
- Red Lead (Sometimes not present- If
so, then use battery clip)
Pin Definition
1 Body ground (black lead)
2 Ignition signal/Press button
3 Diagnosis percentage
4 Engine trouble code/LED
5 ASD
6 SUS trouble code
7 A/C trouble code
8 Ignition control system
U
SE 3-PIN UNIVERSAL CONNECTOR
Some Mercedes-Benz models up to 1996 may have an 8 or 16 pin diagnostic connector. The diagnosis
p
rogram for these models is performed through the “Flash Fault Code” option, which is at the bottom of
t
he Mercedes-Benz chassis number selection menu. See the below graphics below to help with the proper
c
onnections.
- Black Lead
Note: Use battery clip connector for positive (red
lead) connection.