Volvo TSI, Manual

Page: 67 / 250

Group 28 Design and Function
Transmission ECU
W4001493
The transmission electronic control unit (ECU) receives
signals directly from switches and sensors and via the
data links. Based on those inputs, the transmission ECU
controls transmission operation via solenoid valves and
switches. The transmission ECU also supplies system
status and diagnostic information.
The transmission ECU is connected to both the J1939
control data link and the J1587/1708 information data
link.
Note: Early production model transmission ECUs may
be connected to the J1587/1708 and J1922 data links.
For detailed information about transmission ECUs see
the service literature for that particular transmission.
Communication
Equipment
(Expansion
capability)
Instrument Cluster
MIDs 234 & 140
SRS ECU
MID 232
Engine ECU
MID 128
Terminating
Resistor
Diagnostic
connector
Vehicle ECU
MID 144
SAE J1587
/1708
SAE J1939
Transmission ECU
MID 130
Control unit
(Expansion
capability)
Terminating
Resistor
ABS ECU
MID 136
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