Volvo TSI, Manual

Page: 179 / 250

Group 28 Troubleshooting
MID 128 SID 33 Fan Control,
Check
Special tools: J-43233, J-39200, J-41132, J-
43147
NOTE!
Check all the particular connectors for loose connections
as well as for switch resistance and oxidation.
For detailed circuit information, refer to “VNL, VNM Elec-
trical Schematics,” Group 37.
Measurement at the component’s
connector, to the EECU
1
Note: An incorrect value (below) can
also cause the component to fail;
therefore, it is important to check the
component if any of the values are in-
correct.
2
Disconnect the connector to the fan
control solenoid valve. Install breakout
harness J-43147 to the wiring harness
end only.
J-43147
“ Ground wire ” /Control wire:
3
Measure the resistance with ohmme-
ter J-39200.
Ignition key must be in the OFF posi-
tion.
Measuring
points Optimal value
B / alternate
ground 200 k
J-39200
Supply wire:
4
Measure the voltage with voltmeter J-
39200.
Ignition key must be in the ON posi-
tion.
Measuring
points Optimal value
A / alternate
ground B+
J-39200
Check of component
Fan control solenoid valve
1
Disconnect the connector to the fan
control solenoid valve. Install breakout
harness J-43147 to the solenoid valve
harness end only.
Measure the resistance with ohmme-
ter J-39200.
Ignition key must be in the OFF posi-
tion.
Measuring
points Optimal value
A / B 20
J-43147
J-39200
Check of Subsystem
Fan control
1
Ignition key must be in the ON posi-
tion.
Connect breakout box J-41132 in se-
ries between connector EB and the
EECU. Connect jumper harness J-
43233 in series between connector EA
and the EECU.
Measuring
points Optimal value
EB21 / EB9 B+ (fan on)
EB21 / EB9 0 V (fan off)
ground terminal
EB21 with a
jumper wire fan control sole-
noid valve
releases fan
J-41132
J-43233
J-39200
177