Volvo TSI, Manual

Page: 222 / 250

Group 28 Troubleshooting
MID 144 PPID 72 Accelerator
Pedal, Supply Sensors, Check
Other special equipment: J-39200, J-41133,
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:
27102–8 Accelerator pedal, switches and sensor,
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 accel-
erator pedal. Install 5-pin breakout
harness J-41133 to the wiring harness
end only.
J-41133
Ground wire:
2
Turn the ignition key to the OFF posi-
tion.
3
Using ohmmeter J-39200, measure
the resistance from pin E (5–pin har-
ness) to the alternate ground.
Measuring points Expected value
Pin E / alternate
ground
<1
J-39200
Supply wire:
4
Turn the ignition key to the ON posi-
tion.
5
Connect a voltmeter to the connector
and measure the voltage from pin A to
pin E (5–pin harness).
Measuring points Expected value
Pin A / Pin E 5.4 ± 20% V
J-39200
Signal wire:
6
Turn the ignition key to the OFF posi-
tion.
7
Connect an ohmmeter to the 5–pin
breakout harness and measure the re-
sistance.
Measuring points Expected value
Pin B / Pin E 100 ± 20% k
J-39200
Wiring harness
8
To check the wiring harness, see
“VNL, VNM Electrical Schematics,”
Group 37.
Check of component
Accelerator position sensor
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 accel-
erator pedal. Install 5–pin breakout
harness J-41133 to the accelerator
pedal harness end only.
J-41133
2
Turn the ignition key to the OFF posi-
tion.
3
Connect an ohmmeter to the breakout
harness pins and measure the resis-
tance.
Measuring points Expected value
Pin A / Pin E 4 ± 20% k
Pin A / Pin B 4.5 ± 20% k (acceler-
ator pedal at idle)
J-39200
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