Volvo TSI, Manual

Page: 243 / 250

Group 28 Troubleshooting
MID 144 PSID 3 Idle Validation
Switch 3, Check
Other special equipment: J-39200, 9998551,
J-43340, J-43234, J-41133
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:
27104–8 Extra accelerator control, switches and
sensor, test
Measurement at the Component’s
Connector, to the VECU
Note: Faults in the component can be caused by faults
in the wiring harness of the VECU. A check of the wiring
harness should also therefore be made before connect-
ing a new component.
1
Disconnect the connector at the sec-
ond accelerator pedal. Install 5-pin
breakout harness J-41133 to the
wiring harness end only.
J-41133
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
Pin D / alternate
ground
B+
J-39200
Signal wire:
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
Pin C / alternate
ground
1.2 ± 20% k
J-39200
Wiring harness
6
To check the wiring harness, see
“VNL, VNM Electrical Schematics,”
Group 37.
Check of Component
Idle validation switch 3
Note: Faults in the component can be caused by faults
in the wiring harness of the VECU. A check of the wiring
harness should also therefore be made before connect-
ing a new component.
1
Disconnect the connector at the sec-
ond accelerator pedal. Install 5-pin
breakout harness J-41133 to the ac-
celerator pedal harness end only.
J-41133
2
Turn the ignition key to the OFF posi-
tion.
3
Connect an ohmmeter to the connec-
tor and measure the resistance.
Measuring points Expected value
open circuit (accelera-
tor at idle)
Pin C / Pin D
20-90 (full accelera-
tion)
J-39200
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