Volvo TSI, Руководство пользователя, Страница: 237 / 250

Group 28 Troubleshooting
MID 144 SID 243 Cruise Control
Set Switch, Check
Other special equipment: J-39200, 9998551,
J-43340, J-43234
NOTE!
•
Read off the other fault codes for the VECU.
•
Check the particular connectors during the fault
tracing for oxidation and switch resistance. For
detailed circuit information, refer to “VNL, VNM Elec-
trical Schematics,” Group 37.
Appropriate Tests in the VCADS
Pro Tool
The following test(s) are useful for closely examining the
component’s function:
27503–8 Cruise control, switch, test
Measurement at the Component’s
Connector, to the VECU
Note: Faults in the wiring harness to the VECU can
damage the component. Therefore, a check of the com-
ponent should also be made if any of the measurement
values deviate from the expected value.
1
Disconnect the connector at the switch
for the cruise control. Measurements
should be taken only on the wiring
harness connector.
Supply wire:
2
Turn the ignition key to the ON posi-
tion.
3
Connect a voltmeter to the connector
and measure the voltage.
Measuring points Expected value
Wiring harness con-
nector A / alternate
ground
B+
J-39200
Signal wire:
SET+
4
Turn the ignition key to the OFF posi-
tion.
5
Connect an ohmmeter to the connec-
tor and measure the resistance.
Measuring points Expected value
Wiring harness con-
nector E / alternate
ground
1.2 ± 20% k
J-39200
RESUME
6
Turn the ignition key to the OFF posi-
tion.
7
Connect an ohmmeter to the connec-
tor and measure the resistance.
Measuring points Expected value
Wiring harness con-
nector H / alternate
ground
1.2 ± 20% k
J-39200
ON
8
Turn the ignition key to the OFF posi-
tion.
9
Connect an ohmmeter to the connec-
tor and measure the resistance.
Measuring points Expected value
Wiring harness con-
nector C / alternate
ground
1.2 ± 20% k
J-39200
SET-
10
Turn the ignition key to the OFF posi-
tion.
11
Connect an ohmmeter to the connec-
tor and measure the resistance.
Measuring points Expected value
Wiring harness con-
nector G / alternate
ground
1.2 ± 20% k
J-39200
Wiring harness
12
To check the wiring harness, see
“VNL, VNM Electrical Schematics,”
Group 37.
235