Engine Faults - Volvo Link System Service Bulletin

Page 18

Engine Faults

These "engine faults" may be an indication of a fault in
the engine, or in the data link information coming from
the engine ECU or vehicle ECU.
Check for related faults on MID 128. If a related fault ex-
ists for MID 128, the problem is most likely in the engine
system. For more information about engine fault code
troubleshooting, see service information in group 28.
If there are no related faults on MID 128, the problem is
most likely in the data link wiring or connections between
the engine system and the Volvo Link ECU.
Begin checking at the Volvo Link ECU, and the wiring
connecting it to the data link. See the simplified
schematic.
For in-depth troubleshooting of the data link system, see
service information in group 371.
Volvo Link ECU
OPT 1 Two-pin Data Link Connector
OPT 2 Two-pin Data Link Connector. See
following tables for details.
OPT 1 Data Link Connector
Pin
A
B
Location: rear of TEC center
OPT 2 Data Link Connector
Pin
A
B
Location: rear of TEC center
W3005011
Circuit Description
401-B J1587/1708-
400-B J1587/1708+
Circuit Description
401-A J1587/1708-
400-A J1587/1708+