Tracing the
GM Low Speed LAN wire, to help debug my 2006 dash gauges issue.
Most of the dark green wires
get connected together for the low speed LAN.
You will need to keep these green wires:
On the late model Cobalts the GM low speed LAN has these 5 wires:
1. OBD-II port (Pin A)
2. Theft deterrent module (Pin H)
3. Remote control door lock receiver (Pin M)
4. Instrument panel cluster (Pin D)
5. BCM (Pin C)
On my early model Cobalt it has these 4 wires:
-
OBD-II port Pin 1
- Instrument cluster Pin 9
- BCM
C2 pin 38
- PCM C1 pin 16
On the LSJ,
one dark green wire does not get connected.
Instrument cluster Pin 9 Dark Green goes to Data Link Connector (DLC) Schematics
Instrument cluster pin inspection:
DLC Schematics goes to BCM
C2 pin 38 (link may
need info) (C2 is one of the 72 pin Grey blocks, nearest the driver side when in a Goblin, vertical connector)
BCM C1 18 went to the radio receiver (not in Goblin)
BCM C1 36 went to vehicle communications interface module (VCIM) (not in Goblin)
BCM C2 inspection for bent pins:
PCM C1 pin 16 Dark Green goes to DLC Schematics, Computer/Integrating Systems (C1 is the Blue connector on the PCM)
PCM C1 inspection:
extra stuff:
BCM C1 22 GY/BK is left front
door ajar switch grounding signal. (needed for bradr's magical goblin interface)
2006 Remote Control Door Lock Receiver (
RCDLR) doesn't use the GM Low Speed LAN
MAP sensor has IAT2 going to the PCM, C1 (Blue), pin 14, L-BU Light Blue (I want these in my HP Tuner log files.)
MAF sensor has IAT going to the PCM, C2 (Black), pin 51, TN Tan