HARNESS AS-SENSOR 2942709 - Caterpillar

CONFIDENTIAL TIBU3964-00
TECHNICAL INFORMATION BULLETIN September 17, 2003
Marine Engines 3176C (6BW)
3196 (2XR)
3406E (9WR)
3412E (9KS, 9PW)
3126B (3GS, 9ZF)
C-12 (9HP)
C-18 (CKH)
C-30 (CLX)
C-9 (CSN)
Component Code: 1408SUBJECT: Certain 40-Pin to 70-Pin Adapter Harnesses That Are Used With a Troll Processor May Need to Be Rewired
PROBLEM:
On certain 40-Pin to 70-Pin Adapter Harnesses, the J1939 Shield and the J1939 Positive wires may be reversed between the 6-pin receptacle (labeled "J1939") and the 3-pin connector (labeled "J1939-ETP"). When a troll processor is connected to the 40-Pin to 70-Pin adapter harness, a loss of J1939 data link will result.
40-Pin to 70-Pin Adapter Harnesses
Part Number
Engine Models
ECM Type
9E-61801
3412E & C30
ADEM 2
9E-61791
3406E, 3176C, & 3196
ADEM 2
9E-61781
C9, C12, C18, & 3126B
ADEM 3
(1) Part number is not serviceable through Morton Parts. For questions regarding this part number, call the Caterpillar Commercial Engine Analyst at (309) 578-9015.
SOLUTION:
Remove the 18 AWG bare wire (J1939 Shield) from position "6" in the 6-pin receptacle.
Remove the 18 AWG yellow wire (J1939 +) from position "4" in the 6-pin receptacle.
Install the 18 AWG bare wire (J1939 Shield) into position "4" in the 6-pin receptacle.
Install the 18 AWG yellow wire (J1939 +) into position "6" in the 6-pin receptacle.
When the plug is wired correctly, it will conform to the following table.
6-Pin Receptacle Wiring
Color ? AWG Function Position
Red ? 14 Positive Battery 1
Black ? 14 Negative Battery 2
Orange ? 14 Troll 3
Bare ? 18 J1939 Shield 4
Green ? 18 Negative J1939 5
Yellow ? 18 Positive J1939 6
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