Diagnostic Connector
Figure 1.1 – CAT Comm Adapter 3 (to ATA-J1708/J1587)
Deutsch Connectors (6/9-Pin)
NOTE: On the Deutsch 9-pin SAE Standard Heavy-Duty Truck Connector, pins H and J are labeled “OEM Specific”. Some truck OEMs have used these pins differently (ie. PACCAR and ISO9141), however the most common use of these pins is for a second CAN channel (i.e. Freightliner Cascadia).
6-Pin Deutsch – Commonly Called the J1708/J1587 Heavy-Duty Truck Connector
Figure 1.2 – J1708/J1587 on Detroit Engine DDEC IV Series 60
Pin – Value
A-J1708/J1587 Hi
B-J1708/J1587 Lo
C-Battery (+)
D-OEM Specific (or Not Used)
E-Battery (-)
F-OEM Specific (or Not Used)
9-Pin Deutsch-SAE Standard Heavy-Duty Truck Connector
Figure 1.3 – Kenworth/ On-Highway Truck (C10/C13 Engine)
Pin – Value
A-Battery (-)
B-Battery (+)
C-CAN/J1939 Hi
D-CAN/J1939 Lo
E-CAN/J1939 Shield
F-J1708/J1587 Hi
H-OEM Specific (or Not Used)
G-J1708/J1587 Lo
J-OEM Specific (or Not Used)
9-Pin Deutsch-Freightliner Cascadia (H-J Used for Dual CAN)
Pin – Value
A- Battery (-)
B-Battery (+)
C-CAN/J1939 Hi
D-CAN/J1939 Lo
E-CAN/J1939 Shield
F-J1708/J1587 Hi
G-J1708/J1587 Lo
H-CAN 2 HI
J-CAN 2 Lo
9-Pin Deutsch-PACCAR (J Used for ISO9141 K-Line)
Pin – Value
A-Battery (-)
B-Battery (+)
C-CAN/J1939 Hi
D-CAN/J1939 Lo
E-CAN/J1939 Shield
F-J1708/J1587 Hi
G-J1708/J1587 Lo
H-OEM Specific (or Not Used)
J-ISO9141 K-Line
Figure 1.4 – PACCAR (with C13/ISX15 Engine)
Figure 1.5 – Adapter: Nexiq USB-Link
9-Pin Deutsch-CNH (Dual CAN and E Used for ISO9141K-Line)
Pin – Value
A-Battery (-)
B-Battery (+)
C-CAN1/J1939 Hi
D-CAN1/J1939 Lo
E-ISO9141 K-Line
F-N/C
G-N/C
H-CAN2/J1939 Hi
J-CAN2/J1939 Lo
9-Pin Deutsch – ALLISON Transmission/ Cummins Engine
Pin – Value
A-Battery (-)
B-Battery (+)
C-CAN/J1939 Hi
D-CAN/J1939 Lo
E-CAN/J1939 Shield
F-J1708/J1587 Hi
G-J1708/J1587 Lo
H-OEM Specific (or Not Used)
J-OEM Specific (or Not Used)
Figure 1.6 – 5th Gen Allison Transmission (4700-OFS)
9-Pin Deutsch-J1939 “Type 2” for J1939 @500k
Pin – Value
A- Battery (-)
B-Battery (+)
C-CAN/J1939 Hi
D-CAN/J1939 Lo
E-CAN/J1939 Shield
F-Protocol “Hi” Line, ie CAN/J1708/ J1939 Hi
G-Protocol “Lo” Line, ie CAN/ J1708/J1939 Lo
H-OEM Defined (or Not Used)
J-OEM Defined (or Not Used)
9-Pin Deutsch- CAT Industrial Connector – (J1708/J1587, J1939, CAT Data Link)
Pin – Value
A-Battery (+)
B-Battery (-)
C-CAN/J1939 Shield
D-CAT Data Link (CDL) Hi
E-CAT Data Link (CDL) Lo
F-CAN/J1939 Lo
G-CAN/J1939 Hi
H-ATA/J1587/ J1708 Lo (or Not Used)
J-ATA/J1587/ J1708 Hi (or Not Used)
Figure 1.7 – CAT Industrial Connector
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